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  • Copyright 2016 Spatial Analytix, LLC

    GIS for Land Surveyors

    Precision. Accuracy. Reliability

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    GIS as more than just Software

    GeoSpatial Data

    Geoprocessing

    Metadata

    AGENDA

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    How is GIS different than CAD?

    Its about Data, not Drawings

    Points-Lines-Polygons-Symbology

    vs

    Topology-Attributes-Analysis

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    What do these

    Colors indicate?

    Depth to bedrock

    % Sand

    Conductivity

    % Clay

    Hydric Class

    Crop Yield

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    How is GIS different than CAD?

    Its about Data, not Drawings

    Points-Lines-Polygons-Symbology

    vs

    Topology-Attributes-Analysis

    Raster Data

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Copyright {c} 2014 by the McGraw-Hill

    Companies, Inc. All rights Reserved.

    1-10

    GIS data models

    Vector model Raster model

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Copyright

    {c} 2014

    by the

    McGraw-

    Hill

    Compani

    es, Inc.

    All rights

    Reserved

    .

    1-11

    Vector model

    Vertices

    Polygon

    Points

    Nodes

    Line

    X

    Y

    Features

    are stored as a series of x-ycoordinates in a rectangular coordinate system.

    Features can have one of three geometry types: points, lines, or polygons.

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    1-12

    GIS data models

    Three Pillars of GIS

    Imagery (and lots of it)- Raster

    Orthos, NAIP, Satellite, UAV

    Elevation Raster and Vector

    LiDAR, Contours, DEM, DTM

    Vectors- Vector is Vector

    Parcels, Planimetrics, NRI

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Copyright

    {c} 2014

    by the

    McGraw-

    Hill

    Compani

    es, Inc.

    All rights

    Reserved

    . 1-13

    Storing Elevation Data

    Contours

    Raster

    TIN

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Copyright

    {c} 2014

    by the

    McGraw-

    Hill

    Compani

    es, Inc.

    All rights

    Reserved

    .

    1-14

    Digital Elevation Model

    A DEM has cells or

    pixels, each of which

    contains a single

    elevation.

    Regularly spaced array

    of elevation values.

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Copyright

    {c} 2014

    by the

    McGraw-

    Hill

    Compani

    es, Inc.

    All rights

    Reserved

    .

    1-15

    The raster data model

    Rows

    ColumnsX, Y location

    Raster data fileN rows by M columns

    X, Y location

    Georeferenced to earths surface

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Copyright

    {c} 2014

    by the

    McGraw-

    Hill

    Compani

    es, Inc.

    All rights

    Reserved

    . 1-16

    Discrete rasters

    Discrete rasters essentially store

    featuresbut in raster format

    Have relatively few values that

    change abruptly from one category

    to another

    roads

    land use

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Copyright

    {c} 2014

    by the

    McGraw-

    Hill

    Compani

    es, Inc.

    All rights

    Reserved

    .

    1-17

    Continuous rasters

    Continuous rasters store surfaces or fields of variables that change continuously over space

    Many potential values. Adjacent cells rarely share the same value.

    Air photo

    DEM

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Copyright

    {c} 2014

    by the

    McGraw-

    Hill

    Compani

    es, Inc.

    All rights

    Reserved

    .1-18

    Continuous data

    Raster is the best way to store continuously

    changing values such as elevation or distance

    Analysis faster and more flexible than vectors

    for many applications

    Vertices slow processing down with vectors

    Some analysis only possible using rasters

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    The Power of Rasters: Map Algebra

    Rasters are essentially arrays of

    numbers

    Can be added, subtracted, etc

    Line up matching cells vertically

    Copyright 2015 by Maribeth H. Price11-19

    5 7

    2 4

    3 2

    1 6

    8 9

    3 10

    Ingrid1

    +

    Ingrid2

    =

    Outgrid

    Map algebra

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Copyright

    {c} 2014

    by the

    McGraw-

    Hill

    Compani

    es, Inc.

    All rights

    Reserved

    . 1-20

    Raster analysis functions

    Density

    Least cost path

    Distance Interpolation

    Viewshed

    Buffers

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    GIS Software

    Free- QGIS

    Affordable- Global Mapper

    Industry Standard- ArcGIS

    Specialty Extensions

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    ArcGIS Options

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    GIS DATA TYPES

    Imagery

    NYS Orthos, local orthos

    Hydrography

    Stream lines

    Water body polygons

    Wetlands (NWI)

    Planimetrics

    Building footprints

    Pavement/sidewalks

    Land cover

    Impervious Surface

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    GIS DATA TYPES

    Elevation Data

    Contours

    DEMs

    LiDAR Point Clouds

    Parcel Data

    Boundaries

    Centroids

    RPS Data Extract (lots of Attribute data)

    Local Data

    Zoning

    NRI

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Where do I get data?

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    NYS DATA RESOURCES

    NYS GIS Clearinghouse

    https://gis.ny.gov/

    NYS DEC

    http:// www.dec.ny.gov/eafmapper/

    http:// www.dec.ny.gov/gis/erm/

    NYS DOS- Geographic Information Gateway

    http://opdgig.dos.ny.gov/

    Counties/municipalities

    Westchester, Monroe, Dutchess, Albany, Erie, etc

    http://www.spatialanalytixllc.com/https://gis.ny.gov/http://opdgig.dos.ny.gov/

  • Copyright 2016 Spatial Analytix, LLC

    REGIONAL DATA RESOURCES

    PA MAP = PASDA

    http://www.pasda.psu.edu/

    NJ Bureau of GIS

    http://www.nj.gov/dep/gis/listall.html

    MA Office of Geographic Information

    ugly

    CT DEEP or UCONN MAGIC

    www.ct.gov/deep/gisdata

    http://magic.lib.uconn.edu/connecticut_data.html

    http://www.spatialanalytixllc.com/http://www.pasda.psu.edu/http://www.nj.gov/dep/gis/listall.htmlhttp://www.ct.gov/deep/gisdatahttp://magic.lib.uconn.edu/connecticut_data.html

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Copyright {c} 2014 by the McGraw-Hill Companies, Inc. All

    rights Reserved.

    GIS Data Compilation

    1-37

    Old: All data is local and

    works in the GIS program

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Copyright {c} 2014 by the McGraw-Hill Companies, Inc. All

    rights Reserved.

    Web Mapping Services

    1-38

    New: Servers provide data and services to many uses

    on many platforms

    http://www.spatialanalytixllc.com/

  • Copyright 2016 Spatial Analytix, LLC

    Copyright

    {c} 2014

    by the

    McGraw-

    Hill

    Compani

    es, Inc.

    All rights

    Reserved

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