OpenStreetMap Beginner's GuideOpenStreetMap Beginner's GuideOpenStreetMap Beginner's GuideOpenStreetMap Beginner's Guide

——Ep.3 JOSM

by MRY

ContentsContentsContentsContents

• Introduce JOSM for OSM Users• Download and Install JOSM• How to Use JOSM to Edit Map

information

Edit OpenStreetMap Data Offline by JOSM

JOSM stands for "Java OpenStreetMap Editor".

It's an cross-platform editor for OpenStreetMap, just like the Potlatch online editor, but with a

more complicated interface and you can use it to edit map information even if you are not

connected to the network.

Download and Install JOSM

Google JOSM and open "josm.openstreetmap.de/"

Download and Install JOSM

Choose a proper installer that fits your computer.

Download and Install JOSM

Follow the instruction and finish installing.

Use JOSM to Edit Map information

When you open JOSM, it looks like this.It shows the information about the version your are using.

Use JOSM to Edit Map information

Let's start editing map using JOSM:

First, an original map data is needed. So let's download it from OpenStreetMap server. Later you can save the map data in your computer and use it for offline editting next time.

Open the File -> download from OSM

Use JOSM to Edit Map informationIf you are using a mouse: left-click and drag: select a range that you want to download. right-click and drag: move the map and change the center of the view. mouse scroll: zoom in and zoom out

If you prefer using keyboard:"Ctrl" + "." : zoom in"Ctrl" + "," : zoom out"Crtl" + "up/lef/down/right": move the map

But be aware: if the range you select is too big, the sever might not agree the downloading. So focus on where you want to edit once a time.

Use JOSM to Edit Map information

After the downloading, you maybe find the map like the left pic.

To change the view, go to Imagery ->Bing Setand the bing map will show as background.

Use JOSM to Edit Map information

Zoom in and choose the "draw nodes" botton so that than you can line out the buidling you want to edit like the one showed left.

press "Q" to right the angle of the shape you drew if you want.

Use JOSM to Edit Map information

Now you can edit the properties of the building:

Press "+Add" in the properties/membership window.

Fill the key conlum "building" and the value "yes" and click "OK" so the area will be recognized as a building.

Use JOSM to Edit Map information

Then you can add another property to show where you got this data:

Key:sourcevalue:bing

Use JOSM to Edit Map information

To save the edition, you can choose uploading to OpenStreetMap directly by go toFile ->Upload Data

Use JOSM to Edit Map information

Then, this window is opened and you can make a brief comment about why you made these changes. And click "Upload".

If you are not yet logged in, a window of authentication will be opened and ask for username and password. Fill out and click enter to go on.

And the changes will be saved in the OSM server, which you can check on minutes later.

Use JOSM to Edit Map information

If you are not connected to the network or you want to edit more detailed information later, you may choose to save the changes in your computer:

File -> Save as...

Now, Learn More by Yourself !

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