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474/574 Remote sensing Lab: Digitizing Sweet water Wetland Park areas, Tucson AZ by using remote sensing imagery (Aerial and Landsat) and ArcGIS software. Study area. Sweet Water wetlands viewing from Google Earth Imagery. Objectives.
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474/574 Remote sensing Lab: Digitizing Sweet water Wetland Park areas, Tucson AZ by using remote sensing imagery (Aerial and Landsat) and ArcGIS software
Study area Sweet Water wetlands viewing from Google Earth Imagery
Objectives • Get to know different types of remote sensing imagery with different resolutions. • Identify the Sweet Water Wetlands areas in Tucson
Methods • Landsat imagery (30m resolution) 3rd June 2010 • Aerial imagery (1m resolution) with available ortho photography 27th June 2010 from NAIP (National Agriculture Program). • Digitize wetland areas by using ArcGIS 10
How to • Copy 3 available files to your folder : • sww_naip.img : geo_referenced aerial imagery (1m resolution) • sww_landsat.img : geo_referencedlandsatimagry (30m resolution) • sww.shp : available shapefile (with polygon type) of the sweet water wetland feature for digitizing process
How to display the imagery and the shape file in AcrGIS • Open ArcGIS • At Table of Content =>Layer =>Add data • Note: we are working with the aerial imagery first
How to display the imagery and the shape file in AcrGIS • The display window in your ArcGIS will be like this:
How to start digitizing Display Editor toolbar: Customize => Tools=> Editor Then click Start Editing It will appear a create feature window
Digitizing Find wetland areas and Start digitizing:
Click on Layout View feature From here to get a display like this
Create Title, Legend and North Arrow, Scale Go to Insert => Title=> give the tile for the map Go to Insert => Legend => to get Sweetwater Wetland as a legend for the map Go to Insert => North Arrow => Choose one of them Go to Insert => Scale Bar=> choose one of these
Deliverable File => Export Map => Save file as an JPG file.
Then repeat the same procedures for the Landsat imagery (using sww_landsat.img and sww.shp files)
Comparison between two maps: High resolution (1m) imagery gives better features for digitizing than the 30m resolution imagery (Landsat). We can see more detail information in the aerial imagery than the satellite imagery. • Deliverable Sweet water wetland map using Landsat Sweet water wetland map using aerial photo