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Summer Term
Assignment 2
Finding, downloading and reprojecting data
You will now begin to build a database of basemap information
for your GPS project, trying to add useful layers to your project file.
Use the area around PSU and Duniway park. First you need to find data
that is at a high enough level of resolution to be useful. You
will need elevation, topo map, and aerial photo. Anything else you can
think of? Be sure to collect any METADATA that you can find!!!!! Be especially
careful to know the EXACT PROJECTION of any data you download. You can
get other vector data (like streams) to dress up your map if you wish.
At the minimum, get a DOQ, a DEM, and a DRG.
Use these sites:
NW GeoData Clearinghouse
Oregon
GIS Service
Seamless USGS NED and
LandUse
Now that you have downloaded some basemap data, you need
to convert your landslide data
to the same projection. Sure, sure, you could let the "on the fly"
capabilities of ArcMap take care of this, but it's better to do that AFTER
you understand the basics of projections.
Load the ArcToolbox and under Data Management you will find
Projection tools for both Raster and Vector (Features). Remember the "Import"
trick!
Reproject your NED from DD to UTM83_zone10. Same with landslides.
In the end you should have 3 copies of your landslides in
DD, ORSP and UTM83. Each will overlay with a different set of base data.
Answer these questions and turn in the following products
with figure captions and a brief description of each in a well-organized
document. Turn in a printed copy.
- Map from assignment 1 (Include an introduction and
brief overview of how the map was produced)
- Three maps from Assignment 2 (DOQ, DRG, DEM) with landslides.
- What are the major differences between raster and vector data?
- What are some uses for each?
- What are the key ideas in classification? Discrete vs continuous data?
Give examples from an area that you are interested in or your
work.
- What is scale and why is it important? Use examples from your
maps.
updated: June 23, 2008
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