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Precision Positioning for ESRI

User Guide // Version 2.96

Copyright © 2003-2016 Effigis

All rights reserved

Printed in Canada

This revision reflects GNSS Driver for ArcPad software release 2.96

June 2016

The information contained in this document is the exclusive property of Effigis.

No part of this work may be reproduced or transmitted in any printed form, by any digital means, by any information storage or retrieval system, except as expressly permitted in writing by Effigis. All requests should be sent to:

Effigis 4101, rue Molson, Suite 400 Montréal (Québec) Canada H1Y 3L1

The information contained in this document is subject to change without notice. The information contained within this manual is believed to be true and correct at the time of publication.

The software described in this document is provided under a license agreement. This license agreement is on the CD-ROM and is displayed before installing the software. The software may be used or copied only in accordance with the terms of the agreement. It is against the law to copy the software on any medium except as specifically allowed in the license agreement.

GNSS Driver for ArcPad software is a registered trademark of Effigis.

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Contents

OnPOZ.com

1 Introducing the GNSS Driver for ArcPad 1

1.1 Overview 2

1.2 Data Flow 4

1.3 Scope of this User Guide 4

2 Getting Started 6

2.1 Selecting the GNSS Driver for ArcPad as the GPS Pro tocol 7

2.2 Selecting an Existing GNSS Receiver Profile 8

2.3 Creating a New GNSS Receiver Profile 9

2.4 Configuring the GNSS Parameters 10

2.5 Configuring other Options 11

2.6 Viewing Information about the GNSS Driver for ArcPa d 12

3 Collecting Point Features 13

3.1 Creating a New ArcPad Map (APM) using a QuickProjec t 14

3.2 Creating a New ArcPad Map (APM) using New > Map… 15

3.3 Connecting to the GNSS Receiver 16

3.4 Creating Point Features 17

3.5 Creating Point Features using an Average 18

3.6 Moving an Existing Point 19

3.7 Creating Point Features using Offsets 20

3.8 Moving an Existing Point using an Offset 21

3.9 Using Quality Warnings when Capturing Features 22

3.10 Opening an Existing ArcPad Map (APM) 23

4 Collecting Polyline and Polygon Features 24

4.1 Creating Polyline and Polygon Features (Discrete) 25

4.2 Creating Polyline and Polygon Features (Streaming) 26

4.3 Extending Polyline and Polygon Features 27

4.4 Creating a Polyline Connected to an Existing Polyli ne 28

4.5 Creating Polyline and Polygon Features with Offset 29

4.6 Moving Vertices within an Existing Polyline or Poly gon 30

4.7 Creating a Point while Collecting a Polyline or Pol ygon 31

5 Managing the Workflow 32

5.1 Selecting a Coordinate System 33

5.2 Transferring Shapefiles to your Mobile Computer 34

5.3 Modifying and Creating Shapefiles on the Mobile Com puter 35

Contents // ii

5.4 Transferring Shapefiles Back from your Mobile Compu ter 36

5.5 Correcting Shapefiles with EZSurv® 37

5.6 Viewing the Corrected Shapefiles 38

5.7 Known Limitations in ArcPad 39

GNSS Driver for ArcPad // Precision Positioning for ESRI User Guide

Chapter 1

GNSS Driver for ArcPad User Guide 1 effigis.com

1 Introducing the GNSS Driver for ArcPad

The GNSS Driver for ArcPad enables the use of a wide range of professional GNSS receivers for applications requiring the level of precision permitted by the EZSurv® GNSS post-processor.

The GNSS Driver for ArcPad is fully compatible with EZSurv® . GNSS/GIS data collected with ArcPad can be post-processed and corrected using EZSurv® high-end differential GNSS correction algorithms.

The GNSS Driver for ArcPad requires very little additional training for existing ArcPad users, as it is a fully compatible ArcPad extension.

This guide describes how to use GNSS Driver for ArcPad .

GNSS Driver for ArcPad // Precision Positioning for ESRI

User Guide


1.1 Overview The GNSS Driver for ArcPad enables the collection of ESRI Shapefiles using ArcPad for later correction with EZSurv® at the office. The resulting corrected Shapefiles can then be opened with software applications compatible with the Shapefile format. In short the steps are as follows:

1. Collect Shapefiles using ArcPad and the GNSS Driver for ArcPad ;

2. Correct the Shapefiles using EZSurv® (see the EZSurv® documentation for details);

3. Use the corrected Shapefiles with your favorite GIS application.

IMPORTANT: GNSS Driver for ArcPad has limited support for the AXF format: you can collect data in AXF files using the GNSS Driver for ArcPad but you will not be able to post-process the AXF files using EZSurv® . In order to enable post-processing you must collect GNSS data into Shapefile layers instead.

� User Interface The GNSS Driver for ArcPad includes a toolbar containing the OnPOZ icon, leading to the main menu. All preferences for the driver can be set from the GNSS Driver for ArcPad menu.

The GNSS Driver for ArcPad menu opens the GNSS Driver for ArcPad window, which presents the GNSS receiver preferences as well as other application options.

This window provides a central user interface to configure the driver’s operation, although some of the settings echo settings from ArcPad’s own GPS Preferences… window.


User Guide


� GNSS Data Files In order to enable GNSS post-processing with EZSurv® , the GNSS Driver for ArcPad associates GNSS data files with your ArcPad projects (APM) and Shapefile (SHP) layers.

GNSS data files associated with your ArcPad projects (APM) have the same name as your ArcPad project but with the following extensions:

File Extension Description GNSSP GNSS Project File. The GNSSP file represents the GNSS project to EZSurv® , and is

required for GNSS post-processing with EZSurv® .

GPS, OBS, ORB, POS

GNSS Data Files. These files are also required for GNSS post-processing with EZSurv® .

IN.BIN, OUT.BIN GNSS Log Files. The BIN files are binary log files useful for support purposes.

GNSS data files associated with each Shapefile (SHP) layer have the same name as the Shapefile layer but with the following extensions:

File Extension Description GNSSX GNSS Extension File. Associates this layer with the GNSSP project file.

PRJ Projection File. If the Shapefile layer does not already have a PRJ file, then the GNSS Driver for ArcPad will automatically create one.


User Guide


1.2 Data Flow The following figure illustrates the data flow of a typical data capture project with ArcPad and the GNSS Driver for ArcPad .

• Existing Shapefiles are transferred from the GIS to the mobile computer;

• The GNSS Driver for ArcPad is used to provide GNSS positions to ArcPad while collecting new or editing existing Shapefiles; the GNSS Driver for ArcPad associates GNSS data files to the ArcPad project and Shapefile layers;

• Data is transferred back to the Windows powered device from the Mobile device using Mobile File Manager in OnPOZ Tools ;

• On the Windows powered device, the GNSS data is post-processed using EZSurv® and the Shapefiles are corrected accordingly;

• Finally the corrected Shapefiles can be viewed in a GIS.

� Synchronization between Windows Mobile and the PC A Microsoft synchronization tool (Microsoft ActiveSync on Windows XP or Microsoft Windows Mobile Device Center on Windows Vista, Windows 7, Windows 8, Windows 8.1 or Windows 10) is used to transfer data between the PC and the Windows Mobile device.

Please refer to the following link in order to find more information about the Microsoft synchronization tools: http://www.onpoz.com/Support/Tools.aspx

1.3 Scope of this User Guide This user guide explains the specifics about the GNSS Driver for ArcPad within the context of ArcPad. Most of the guide is designed as a tutorial on using some of the features of ArcPad, annotated with comments about the

EZSurv ®

GNSS Driver for A rcPad

Mobile Device

Synchronization (Microsoft ActiveSync or

Microsoft Windows Mobile Device Center)

Windows powered device

GIS

Corrected Shapefiles are ready for your GIS

ArcPad (APM / GNSSP) map including new and/or edited Shapefiles

Existing Shapefiles

Mobile File Manager


User Guide


GNSS Driver for ArcPad or EZSurv® . We strongly recommend you refer to the Using ArcPad manual and the ArcPad Reference Guide for complete and official ESRI information about using ArcPad.


Chapter 2


2 Getting Started This chapter introduces the configuration steps needed to get you started with using the GNSS Driver for ArcPad .


User Guide


2.1 Selecting the GNSS Driver for ArcPad as the GPS Protocol Once the GNSS Driver for ArcPad is installed, you will need to select it as the current GPS protocol in ArcPad.

From the OnPOZ toolbar, select GNSS Driver for ArcPad

Select the Receiv. tab.

Check the GNSS Driver box to enable the GNSS Driver for ArcPad as the current GPS protocol.

Click the ok button.

This will automatically set OnPOZ GNSS Driver in the Protocol field of the GPS tab from ArcPad’s GPS Preferences dialog.

If you need to go back to one of ArcPad’s GPS protocol, you can uncheck the GNSS Driver box and click ok . By default this will automatically select NMEA 0183 as the Protocol in ArcPad’s GPS Preferences dialog.

You can alternatively select the protocol from ArcPad’s GPS Preferences dialog.

However you will need to use the OnPOZ GNSS Preferences… dialog in order to select a specific GNSS receiver profile, since the ArcPad GPS Preferences dialog does not include the concept of GNSS receiver profiles.

You can alternatively select the desired protocol from ArcPad’s GPS Preference dialog. This will automatically uncheck the OnPOZ GNSS Driver box if you select anything other than OnPOZ GNSS Driver .


User Guide


2.2 Selecting an Existing GNSS Receiver Profile Once you have selected OnPOZ GNSS Driver as the GPS Protocol in ArcPad, you must select a GNSS profile for the GNSS receiver that you are using. A GNSS profile contains all the parameters (COM port, baud rate, etc.) needed to operate your GNSS receiver.



Make sure that the GNSS Driver box is checked and select the desired GNSS receiver profile from the Receiver Profile list box.

Click the ok button.

IMPORTANT: The GNSS Driver for ArcPad ignores all the serial port parameters configured in ArcPad’s Serial Port Parameter dialog. The GNSS Driver for ArcPad uses the parameters defined in the GNSS receiver profile instead.

Before testing your GNSS connection you must save an ArcPad map (APM). Use either File > New > QuickProject… or File > Save Map to save an ArcPad map.

To test your GNSS connection, hook up and power up your GNSS receiver, then select GPS Active and GPS Position Window from ArcPad’s GPS menu. If successful, then the GPS Position Window will show some activity.

If for any reason the connection is not established, you will get the Error opening GPS port message. Check the following:

•••• Is the ArcPad map (APM) saved ?

•••• Is the GNSS receiver powered on and properly attached to the COM port ?

•••• Are you using the appropriate GNSS receiver profile ?

•••• Is the GNSS receiver already in use by another application ? Use the GNSS Control Panel to find out. See the GNSS Control Panel User Guide for details.

The GNSS Driver for ArcPad comes with a set of predefined GNSS receiver profiles.

If your GNSS receiver has no corresponding profile in the list you can create new profiles with the Profiles… tab. See the next section for details.

A GNSS receiver profile contains all the information necessary for establishing a connection to a GNSS receiver, including:

• COM port

• Baud rate

• Receiver protocol

• etc.

If you try to test the GNSS connection before saving your ArcPad map, you will get the following messages upon clicking GPS Active :


User Guide


2.3 Creating a New GNSS Receiver Profile If no suitable GNSS profile exists for your GNSS receiver, you can use the Profiles tab to create a new one.


Select the Profiles tab.

This opens the GNSS Receiver Profiles Editor for editing the currently selected profile or for creating a new profile.

The GNSS Receiver Profiles Editor is part of the GNSS Control Panel . See the GNSS Control Panel User Guide for details about editing profiles.


User Guide


2.4 Configuring the GNSS Parameters You can configure some other GNSS parameters.



Use the Antenna Height field to specify the antenna height in meters. This field is grayed-out when the GPS is active.

IMPORTANT: Only the antenna height that is active at the time of first GNSS receiver connection for that ArcPad map (APM) will be used by EZSurv® correction of Shapefiles at the office. Do not change the antenna height until you create a new ArcPad map.

Use the Mask Angle field to specify an angle above the horizon below which the GNSS receiver should ignore satellites. Only satellites above this angle will be used.

Click ok to accept.


User Guide


2.5 Configuring other Options


Select the Options tab.

Check the OnPOZ Toolbar box to view the OnPOZ Toolbar in ArcPad.

Check the Automatically Pan View box to automatically pan the map view according to the current GNSS position.

Check the Record Log File box to enable logging of raw GNSS data to IN.BIN and OUT.BIN files for your recorded projects. This is meant for support purposes, and you should normally leave this box unchecked.

Select the level of confidence for the Estimated Position Error (EPE) . The selected type of EPE will be used in ArcPad. Available choices are:

• 1 Sig. Hor. (39%) : one time horizontal (2D) variance.

• 2 Sig. Hor. (86%) : two times horizontal (2D) variance.

• 3 Sig. Hor. (99%) : three times horizontal (2D) variance.

Click ok to accept.

REMARK Use the Record Log File option with care. The IN.BIN file can get quite large after a few hours of data collection.

The Record Log File check box is not related to ArcPad’s Log check box under GPS Preferences > GPS .

The value of the Automatically Pan View box is synchronized with ArcPad’s GPS Preferences > GPS > Automatically Pan View box.

If you uncheck OnPOZ Toolbar , you can later restore the toolbar from ArcPad’s Toolbar > OnPOZ GNSS Driver menu.


User Guide


2.6 Viewing Information about the GNSS Driver for ArcPad

From the OnPOZ toolbar, select About GNSS Driver for ArcPad

Or select About… from the Home menu of the GNSS Driver for ArcPad window.

The information about the GNSS Driver for ArcPad is displayed.

Click ok (on Windows Mobile) or X (on Windows) to exit this window.

Note that if you have activated the GPS, then the about box will contain additional information about the GNSS Universal Driver .

Select Help… from the Home menu of the GNSS Driver for ArcPad window.

This opens a page with help information about the GNSS Driver for ArcPad .

Click OK to close the window.

Alternatively you can view this information from ArcPad’s help menu, under About Extension > OnPOZ GNSS Driver .

Note: On some Windows Mobile devices the ArcPad help menu may be hard to reach: you must click to the right of this icon:


Chapter 3


3 Collecting Point Features This chapter provides a quick introduction to collecting point features using your GNSS receiver and ArcPad standard tools, and includes insights about the contribution of the GNSS Driver for ArcPad .

This chapter requires that you have read and mastered chapter 2 about getting started with the GNSS Driver for ArcPad . At this point you should already be able to connect to your GNSS receiver using the GNSS Driver for ArcPad .

IMPORTANT: We strongly recommend you read the Using ArcPad manual and the ArcPad Reference Guide for a more in-depth description of GNSS data collection under ArcPad.


User Guide


3.1 Creating a New ArcPad Map (APM) using a QuickProject Before you start collecting points, polylines or polygons, you must create a new ArcPad map (or open an existing one as discussed later in this chapter). This section shows how to do so with a QuickProject. The next section shows how to do so using New > Map…

Note: You must create an ArcPad map (APM) before attempting the connection with your GNSS receiver.

Select New > QuickProject … from ArcPad’s File menu.

Click ok when asked to confirm. This creates an ArcPad map (APM) for you.

IMPORTANT: We strongly recommend that you uncheck the Keep layers from current map box at all times.

If you leave it checked you may get a warning message indicating that a layer from the previous map cannot be used for GNSS data collection in the new map. This layer will be turnd off for editing.

This is because the GNSS Driver for ArcPad requires that a layer used for GNSS data collection be always used with the same map.

IMPORTANT: If you later turn on this layer (the one that was automatically turned off) for editing and capture a feature, you will get a message indicating that no GNSS data can be collected for that layer.

The layer will be automatically turned off again for editing, and the feature just captured will not be post-processed by EZSurv® .

Tip: use Tools > Options… > Path to configure the folders where the QuickProject will be created.

The warning message explicitly names the layer and map:


User Guide


3.2 Creating a New ArcPad Map (APM) using New > Map… Before you start collecting points, polylines or polygons, you must create a new ArcPad map (or open an existing one as discussed later in this chapter). The previous section shows how to do so using a QuickProject. Now this section shows how to use New > Map… instead.

Note: You must create an ArcPad map (APM) before attempting the connection with your GNSS receiver.

Select New > Map… from ArcPad’s File menu.

This creates a new empty ArcPad map in memory (but not yet on disk).

Select New > Shapefile to create a new Shapefile for your map. Refer to the Using ArcPad manual for details.

Alternatively use the layers button to add an existing Shapefile for your map. Refer to the Using ArcPad manual for details.

Once you are done creating and adding Shapefiles for your map, select Save Map from ArcPad’s File menu to save the map to an APM file on disk.

This opens the Save As dialog.

Enter a name for your map in the Name field.

You can optionally select the folder location for your map. Click Save to save the map to an APM file.


User Guide


3.3 Connecting to the GNSS Receiver Once the current ArcPad map (APM) is saved, you can connect to your GNSS receiver.


Use the Antenna Height field to enter the antenna height that you are going to use for GNSS capture with this map.

Connect to your GNSS receiver, as described in Chapter 2 .

IMPORTANT: Only the antenna height that is active at the time of first GNSS receiver connection for that ArcPad map (APM) will be used by EZSurv® correction of Shapefiles at the office. Don’t change the antenna height until you create a new ArcPad map.

Once the connection is established, the GNSS Driver for ArcPad automatically adds a file with extension GNSSP file to the ArcPad map.

As soon as the GNSS Driver for ArcPad is receiving GNSS data it will also create files with extensions GPS, OBS, ORB and POS.

The GNSS Driver for ArcPad will automatically add a file with extension GNSSX to a layer as soon as you start collecting GNSS data into that layer. Layers where you have not collected GNSS data will not have the GNSSX file.

IMPORTANT: The GNSSX file links the layer to the project containing this layer. The GNSS Driver for ArcPad requires each Shapefile layer containing data captured with the GNSS driver to be included in only one ArcPad map (APM).

Files with extensions IN.BIN and OUT.BIN will be present if you have activated the Record Log File option in the GNSS Driver’s options.

If you try to connect to the GNSS receiver before saving your ArcPad map, you will get the following messages upon clicking GPS Active :


User Guide


3.4 Creating Point Features With the GNSS Driver for ArcPad active you can add point features to a point layer of your current ArcPad project.

From ArcPad’s Edit toolbar, select Point . This will indicate to ArcPad that you will be collecting point features into the point layer that is selected for edition.

Make sure that the Offset Point menu is not marked as active.

Tip: it is not active if there is not red border around the icon to the left of the Offset Point menu.

From ArcPad’s Edit toolbar click the Capture Point button:

Fill in the attribute data and click ok .

The new point will display on the map:

IMPORTANT: As soon as the GNSS Driver for ArcPad collects GNSS data for a layer, it adds a GNSSX file to the file set for the layer.

The GNSSX file binds that layer to the current ArcPad map. Only when you have this map open will the GNSS Driver for ArcPad collect GNSS data for post-processing this layer. When this map is not open, then no GNSS data for post-processing can be collected for this layer.

If your ArcPad project contains more than one point layer, you can use the ArcPad Table of Contents to select which of the point’s layers will be editable.

Click the button to access the Table of Contents then select the point’s layer in the

column:

You can have one of each type (points, polylines and polygons) of layers editable.


User Guide


3.5 Creating Point Features using an Average You can configure ArcPad to capture point features using an average. The captured average point will be post-processed and corrected by EZSurv® as an average of the GNSS observations covering the average period. This can yield significantly higher precision than capturing without averaging.

From the Capture tab of the GPS Preferences , check the Enable Averaging box.

Use the Points field to enter the average duration as a number of points to average together.

Click ok .

Start the capture of a new point. Note that during the capture of the point the percentage of completion will be indicated. You should normally wait until 100% completion is achieved. Click ok when complete.

IMPORTANT: Do not move the antenna during the averaging process, otherwise this will have impact on the precision of the average point.

REMARK Back at the office, EZSurv® will compute the position over the average of post-processed GNSS observations.

To go back to single, non-averaged point, uncheck the Enable Averaging box.

If you click ok before completion of the average, ArcPad will ask you to confirm before stopping the average.


User Guide


3.6 Moving an Existing Point You can use the GNSS to move the position of an existing point.

From the Edit toolbar, choose the Select tool.

Select an existing point to modify on the map.

From the Edit toolbar, choose the Feature Properties tool.

Select the Geography tab.

Click the satellite icon to take a new GNSS position for this point:

Click ok to accept the new position.

See the section entitled Moving an Existing Point using an Offset for an alternate way of moving a point, through the Move to GPS context menu.

This will also work if you have enabled averaging. In this case wait until the average is complete before clicking ok .


User Guide


3.7 Creating Point Features using Offsets You can use ArcPad to create a point feature using a 1 point offset or 2 points offset. This section gives an example using 2 points offset. Please refer to the Using ArcPad manual for details about all possible types of point offsets.

From the Edit toolbar activate the Offset Point menu item. With this item active any point feature that you create or edit will be captured using a 1 point or a 2 points offset.

From ArcPad’s Edit toolbar, click the Capture Point button:

This opens the Point/Vertex offset dialog. Select the 2 Point Offset tab.

Now suppose that on the field you have the scenario illustrated in the sidebar.

Walk to reference point A on the field and select Offset is left of A-B from the list.

Enter the Slope Distance calculated from point A to the object.

Click on the icon to capture the GNSS position for reference point A.

Click the satellite icon to take a new GNSS position for this reference point:

Click ok once the capture is completed.

Walk to reference point B on the field.

Enter the Slope Distance from point B to the object.

Use the icon to capture the GNSS position for reference point B.

Fill in the attribute data and click ok . The new point will display on the map.

REMARK At the office EZSurv® will compute the corrected position of the point feature after post-processing the reference points A and B.

A fence prevents you from walking to the object marked by the star.

A

B

You can capture two reference points (A and B) and indicate the distance from each point to the object.

You can use a rangefinder device to measure distances. See the ArcPad documentation for how to use your rangefinder device.


User Guide


3.8 Moving an Existing Point using an Offset You can use the GNSS to move the position of an existing point using an offset.

From the Edit toolbar, choose the Select & Vertex Editing tool.

Click and hold the point to move. This will open a context menu.

Select Move To… from the menu.

This opens the Point/Vertex dialog where you can apply an offset (from the Offset or 2 Point Offset tabs) as described in the previous section.

Click on the check mark icon to confirm the change:

You can use the Move To GPS menu to move the point without using offset. This is an alternative to the method described in the section titled Moving and Existing Point. As with Move To… you will have to use the check mark icon to confirm the change.

Yet another method to move the point without using offset is to use the Move To… menu and select the XYZ tab instead of one of the offset tabs.


User Guide


3.9 Using Quality Warnings when Capturing Features With the GNSS Driver for ArcPad active, you can use the regular ArcPad quality warnings to help you filter out GPS data that does not meet you quality requirements while capturing points, polylines and polygon features.

Select GPS Preferences… > Quality to open the Quality page of the GPS Preferences dialog. Select one of the following:

• No Warnings – there will be no quality check on GPS data;

• Non-Compulsory Warnings – there will be a quality check and you will be asked to confirm whether you want to keep or discard the GPS data when it does not meet your quality criteria;

• Compulsory warnings – GPS data that does not meet your quality criteria will be discarded automatically.

Check the box for each of the critera that you want ArcPad to monitor.

• Maximum PDOP : enter a value for the maximum acceptable PDOP;

• Maximum EPE : enter a value for the maximum acceptable estimated position error in meters.

• DGPS Mode Only : this warning will be raised when the position is not a DGPS solution. Unless you are using a DGPS radio you should leave this option unchecked;

• 3D Mode Only : this option has no effect when using the GNSS Driver for ArcPad , since the driver will only send 3D positions to ArcPad.

In addition to quality warnings applicable to data capture, ArcPad allows you to configure alerts that will inform you when your quality requirements are not met, even when not capturing data. Select GPS Preferences… > Alerts to setup the alerts. Each alert can be configured to generate a visual and/or audio signal.

The GNSS Driver for ArcPad requires a minimum of 4 satellites and will not compute 2D positions. In cases where 3D positions cannot be computed then ArcPad receives not position from the driver and will display the following message if the Not a 3D Fix alert is active (see next section about alerts):

The DGPS Mode Only warning will be raised even if a position was computed using SBAS corrections. There is no way to setup a warning on non-SBAS positions.


User Guide


3.10 Opening an Existing ArcPad Map (APM) In a later session of ArcPad you may want to reopen the ArcPad map (APM) that you created previously.

Select Open map … from ArcPad’s File menu.

Select the APM file to open and click Open .

This closes the current map and opens the selected map.

REMARKS The GNSS Driver for ArcPad automatically opens the GNSSP file if there is one with the same name as the ArcPad map (in the above example it would be QuickProject GNSSP). Otherwise it will create the GNSSP file and all the other required GNSS files for this project.


Chapter 4


4 Collecting Polyline and Polygon Features

This chapter provides a quick introduction to collecting polyline and polygon features using your GNSS receiver and ArcPad standard tools, and includes insights about the contribution of the GNSS Driver for ArcPad .

This chapter requires that you have read and mastered the previous chapters about getting started with the GNSS Driver for ArcPad and about collecting point features. At this point you should already be able to connect to your GNSS receiver using the GNSS Driver for ArcPad and to create and edit point features.



User Guide


4.1 Creating Polyline and Polygon Features (Discrete) With the GNSS Driver for ArcPad active, you can add polyline (or polygon) features to a polyline (or polygon) layer of your current ArcPad project. This section shows how to do so in discrete mode, by entering each vertex one by one.

From ArcPad’s Edit toolbar, select Polyline (or Polygon ). This will indicate to ArcPad that you will be collecting polyline (or polygon) features into the polyline (or polygon) layer that is selected for edition.

Make sure that the Offset Polyline/Polygon menu is not marked as active. (We will be using offsets later in this chapter, but right now let’s collect a polyline without offset).

From ArcPad’s Edit toolbar, click the Capture Vertex button to add a vertex to the polyline. Click it a few more times to add more vertices:

If you have enabled averaging, the Vertex window will open each time you add a vertex (otherwise this window will not open). The duration of the average is specified in the GPS Preferences > Capture > Vertices field. The progress bar will reach 100% once the average is complete.

Click on the arrow icon to terminate the polyline (or polygon):

Fill in the attribute data and click ok . The new polyline (or polygon) will display on the map.

IMPORTANT: Do not exit ArcPad before closing the polyline or polygon . If you do so you will lose the polyline or polygon as it will not be saved to the Shapefile layer.

If your ArcPad project contains more than one polyline (or polygon) layer, you can use the ArcPad Table of Contents to select which of the polyline (or polygon) layers will be editable.

Click the button to access the Table of Contents then select the polyline (or polygon)

layer under the button.

Averaging of vertices is similar to averaging of points discussed in the section entitled Create Point Features using an Average . Use the GPS Preferences > Capture > Vertices field to setup the number of positions to include in the average.

REMINDER As soon as the GNSS Driver for ArcPad collects GNSS data for a layer, it adds a GNSSX file to the file set for the layer.

The GNSSX file binds that layer to the current ArcPad map. Only when you have this map open will the GNSS Driver for ArcPad collect GNSS data for post-processing this layer. When this map is not open, then no GNSS data for post-processing can be collected for this layer.


User Guide


4.2 Creating Polyline and Polygon Features (Streaming) With the GNSS Driver for ArcPad active you can add polyline (or polygon) features to a polyline (or polygon) layer of your current ArcPad project. This section shows how to do this in streaming mode, by having ArcPad automatically add vertices as a continuous stream.

From ArcPad’s Edit toolbar, select Polyline (or Polygon ), and make sure that the Offset Polyline/Polygon menu is not marked as active.

From ArcPad’s Edit toolbar click the Capture Vertices button to start adding vertices automatically to the polyline (or polygon):

You can use the GPS Preferences > Capture dialog to define how to filter the vertices.

• The Position Interval field specifies how many GNSS positions ArcPad will wait until entering a new vertex into the polyline (or polygon);

• The Distance Interval field specified the minimal distance between the last vertex and the next one to be added.

Click the Capture Vertices button again to stop the automatic capture of vertices.


Fill in the attribute data and click ok . The new polyline (or polygon) will display on the map.

IMPORTANT: ArcPad will collect a maximum of 2000 vertices in a single continuous capture. To capture more than 2000 vertices in a polyline or polygon, see the next section about extending a polyline or polygon, or see the tip in the sidebar.

TIP: If you are planning to create a line for 2 hours (7200 seconds), set Position Interval to 4 in order to make sure that your line will contain less than 2000 vertices.

ArcPad combines the Position Interval and Distance Interval together while filtering positions.


User Guide


4.3 Extending Polyline and Polygon Features With the GNSS Driver for ArcPad active, you can add vertices to the beginning or to the end of polyline (or polygon) features.

From ArcPad’s Edit toolbar, choose the Select tool.

Select an existing polyline (or polygon) on the map.

Select Append Vertices to start adding vertices to the end of the feature (or select Insert Vertices to start adding vertices to the beginning of the feature).

Click the Capture Vertex to add a discrete vertex.

Click Capture Vertices to add a stream of vertices to the feature.

Click Capture Vertices again to stop the stream.

Click on the check mark icon to terminate addition of vertices to the polyline (or polygon):


User Guide


4.4 Creating a Polyline Connected to an Existing Polyline With the GNSS Driver for ArcPad active, you can create a new polyline that will automatically connect to the last position of an existing polyline. This does not apply to polygons.

From ArcPad’s Edit toolbar, choose the Select tool.

Select an existing polyline on the map.

Select the Segment Polyline menu.






The new polyline will display on the map. Its first point will be at the same location as the last point of the reference polyline.


User Guide


4.5 Creating Polyline and Polygon Features with Offset With the GNSS Driver for ArcPad active, you can create a new polyline (or polygon) using an offset at some distance to the left or to the right of the polyline (or polygon).

From ArcPad’s Edit toolbar, select Polyline (or Polygon ).

Click the Offset P olyline/Polygon menu.

Select Left or Right as the direction with regards to the start-to-end direction of the polyline (or polygon). Use the Distance field to enter the distance by which to offset the polyline (or polygon).






The new polyline is displayed on the map, as computed with the specified offset.

REMARK At the office, EZSurv® will compute a new polyline or polygon offset after post-processing the original vertices. All Z coordinates and M values will be set to zero on the offsetted feature.

IMPORTANT: ArcPad will allow you to offset only a new polyline or polygon. You will not be able to offset the vertices added to an existing polyline or polygon.


User Guide


4.6 Moving Vertices within an Existing Polyline or Polygon With the GNSS Driver for ArcPad active, you can move vertices within existing polyline and polygon features. You can do so with or without the use of a vertex offset.

From the Edit toolbar, choose the Select & Vertex Editing tool.

Select an existing polyline (or polygon) on the map.

Click and hold the vertex to move. This will open a context menu.

Select Move To GPS if you want to move the vertex without offset, or Move To… is you want to move the vertex using a 1 point or 2 point offset.

If you selected Move To… the Point/Vertex dialog will open to let you select your offset reference points and parameters. Click ok when done.

If you selected Move To GPS this dialog will not be displayed.

REMARK If an offset was used then at the office EZSurv® will compute the corrected position of the vertex after post-processing the reference point(s) A (and possibly B).

Click on the check mark icon to confirm the change:


User Guide


4.7 Creating a Point while Collecting a Polyline or Polygon With the GNSS Driver for ArcPad active, you can create point features while collecting a polyline or polygon.

From the Edit toolbar, select Polyline (or Polygon ).

Click the Capture Vertices button to start adding vertices automatically to the polyline (or polygon):

From the Edit toolbar, select Point .

This will pause the polyline (or polygon) in progress and give you the opportunity to create one or more new points.

Walk away from the path of the line and click the Capture Point button:

Once done adding points, walk back to the path of the line and select Polyline (or Polygon ) again to resume the polyline (or polygon) feature.

You will need to click Capture Vertices again if you want to resume capturing vertices in a continuous stream; then click Capture Vertices again to stop the stream.


Fill in the attribute data an click ok .

You can alternatively add vertices individually using the Capture Vertex button.

You can alternatively add additional vertices individually using the Capture Vertex button.

This procedure will work when editing an existing a polyline (or polygon), as well as when creating one.


Chapter 5


5 Managing the Workflow This chapter provides a review of the data collection workflow for a typical scenario where you would need to update existing Shapefiles on the field using ArcPad and the GNSS Driver for ArcPad .

This chapter requires that you have read and mastered the previous chapters.



User Guide


5.1 Selecting a Coordinate System An ArcPad map (APM) is required to collect Shapefiles for GNSS post-processing. The ArcPad map and all the Shapefiles it contains must share a single coordinate system, either geographic or projected.

Make sure that you identify the PRJ file that contains the parameters of the geographic or projected coordinate system that you are planning to use.

To use this coordinate system as a default for all your maps in ArcPad, create a copy under the name ArcPad.prj . then copy the file to the Default Maps and Data Path folder (use Options… > Paths to select this folder).

If ArcGIS is installed on the same computer as EZSurv® , EZSurv® will use the ArcGIS projection engine. Otherwise, it will use EZSurv® projection engine.

IMPORTANT: When using the EZSurv® projection engine, you must select the projection in EZSurv® to match the one used in your shapefiles.

You must do so for each ArcPad map you want to post-process, unless all maps share the same coordinate system (in which case you can do it once). Each maps having a different coordinate system must be post-processed separately, after selection of the appropriate mapping system. Please refer to the EZSurv® documentation for details.

On your PC installation of ArcPad, a complete set of PRJ files is located under the Coordinate System folder of your ArcPad installation. Ex:

C:\Program Files\ArcPad 10.0\Coordinate System

Users who require the use of special datum transformations can use the ArcPad Datum Configuration Tool .

Please refer to the Using ArcPad manual for details.


User Guide


5.2 Transferring Shapefiles to your Mobile Computer To edit existing Shapefiles with ArcPad, you must first transfer the Shapefiles to your mobile computer. This section gives a quick overview of what files need to be transferred.

Each Shapefile layer that you want to edit must contain at least the SHP, SHX and DBF files. See sidebar for possible additionnal file extensions.

Use a single folder to gather all files from all layers that you want to bring for editing into ArcPad.

Alternatively, ArcGIS users can use the Get Data for ArcPad to prepare an ArcPad map (APM) and the Shapefiles layers to be used on the field. Open the Shapefile layers in ArcMap and click the Get Data for ArcPad button:

Select the layer(s) and click Next .

Click Finish . This will create a new folder containing the ArcPad map file (APM) as well as the Shapefile layer files (SHP, SHX, DBF, PRJ, APL , SBN, SBX) for the layers that you have selected.

Whether you have prepared the folder of Shapefiles manually or using Get Data for ArcPad , copy the entire folder to the mobile computer.

REMARK If your mobile computer is a Windows Mobile device you should use Microsoft ActiveSync to transfer from Windows XP or Microsoft Windows Mobile Device Center to transfer from Windows Vista , Windows 7, Windows 8 , Windows 8.1 or Windows 10 .

The Shapefile layer may also include additional files. Here is a summary of the typical extensions for Shapefile layer files:

APL – ArcPad layer PRJ – coordinate system SBN, SBX – spatial index AIN, AIX – attribute index

.

Sample content of a folder created using Get Data for ArcPad , including and ArcPad map (APM) in addition to the layer files.

.


User Guide


5.3 Modifying and Creating Shapefiles on the Mobile Computer Use the instructions from previous chapters to modify existing Shapefiles or to create new Shapefiles.

See Chapter 2 … …for a reminder about how to prepare for collecting with the GNSS Driver for ArcPad .

See Chapter 3 … …for a reminder about how to create new maps, how to open existing maps as well as how to create and edit point features.

See Chapter 4 … …for a reminder about how to create and edit polylines and polygons.


User Guide


5.4 Transferring Shapefiles Back from your Mobile Computer Once you are done collecting data using ArcPad, you must transfer the data back from your mobile computer onto the computer that runs EZSurv® .

.

We strongly recommend using the Mobile File Manager in OnPOZ Tools to transfer your files.

If you decide to transfer the files manually, transfer the entire content of your ArcPad map folder from the mobile computer to the desktop computer where EZSurv® is installed.

IMPORTANT: You must preserve the file hierarchy. Keep all the files in the same folder on the PC if they are all on the same folder on the mobile. If you put some files in subfoders on mobile, they must appear in the same subfolder on the PC.

You need to transfer • The GNSSP, GPS, OBS, ORB and POS;

• For each layer, you need the SHP, SHX, DBF, PRJ and GNSSX;


User Guide


5.5 Correcting Shapefiles with EZSurv® Once the data is back from the field, you can post-process it with EZSurv® . EZSurv® will automatically correct the Shapefiles based on the post-processed GNSS data.

IMPORTANT: We strongly recommend you read the EZSurv® User Guide for an in-depth description of GNSS post-processing with EZSurv® .

Drag and drop the GNSSP file to the Project Manager’s Observations folder to open the GNSSP file.

If ArcGIS is installed on the same computer as EZSurv® , EZSurv® will use the ArcGIS projection engine. Otherwise, it will use EZSurv® projection engine.

IMPORTANT: When using the EZSurv® projection engine, you must select the projection in EZSurv® to match the one used in your shapefiles.

You must do so for each ArcPad map you want to post-process, unless all maps share the same coordinate system (in which case you can do it once). Each maps having a different coordinate system must be post-processed separately, after selection of the appropriate mapping system.

Use Tools > Process Auto… or Tools > Process Manual to post-process the GNSS data.

Select File > Save to save the post-processed data and to correct the Shapefiles. After 100% progress a message will indicate that Shapefile correction is in progress. Please wait until this is completed.

IMPORTANT: You must save in order to apply the corrections to the Shapefiles.

It is convenient to save to a sub-folder of your ArcPad map folder.

Please refer to the EZSurv® documentation for details.


User Guide


5.6 Viewing the Corrected Shapefiles You can view the corrected Shapefiles using any Shapefiles compliant software.

Once EZSurv® has post-processed your map, it corrects the Shapefiles using the post-processed GNSS data.

EZSurv® makes a copy of the un-corrected Shapefile layers using a suffix _RT1 (or more generally _RTi if you go back on the field after post-processing).

You can view both the corrected and un-corrected versions of the Shapefiles using your favorite Shapefile viewer.


User Guide


5.7 Known Limitations in ArcPad See the GNSS Driver for ArcPad Release Notes for a list of known limitations in ArcPad.

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