Tuesday, March 3, 2009

County Data Collection Progress

After searching around for the best sites to get county level data, I have come to the conclusion that http://datagateway.nrcs.usda.gov/GatewayHome.html is the best one. Provided by the USDA and NRCS this site allows FTP downloads by county and offers a wide range of GIS shape files.

Today I have been trying to collect the data for one county (ouray county) to try to set up a standard dataset that I will use to find the rock glaciers and explain their existence. At the moment I have the following data for this county:

  • 12-Digit Watershed Boundary Dataset 1:24,000
  • Digital Ortho Quad County Mosaic by APFO
  • Digital Ortho Quad County Mosaic by NRCS
  • Enhanced Digital Ortho Quad TerraServer
  • 2006 National Ag. Imagery Program Mosaic
  • Geographic Names - Populated Places
  • National Land Cover Dataset by State
  • Soil Survey Spatial and Tabular Data (SSURGO 2.2)
  • U.S. General Soil Map (STATSGO)
  • U.S. General Soil Map (STATSGO) - State Subset
  • Annual Average Precipitation by State
  • Monthly Average Precipitation by State
  • Annual Minimum Temperature by State
  • Annual Maximum Temperature by State
  • Annual Average Temperature by State
Brad will also be providing me DEMs for the study area as well so I can extract elevation, aspect, hillshades, etc. I will hopefully be doing this next week during Spring Break.

Also, I have re-referenced the original map of the study area to line up with the lat/long lines instead of the rivers which gave considerable error before. The current raster also has a high error but it fills the study area correctly and is easier to read. Here is the image:




Currently 16/90 hours completed as of March 3rd, 2009


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