Utah GIS Data Portal
Utah’s State Geographic Information Database (SGID) contains files and links to several different categories of data sets. Data presented for download on this site is considered to be in the public domain. Data includes imagery and vector data that can be downloaded or they also have several data servers that you can connect to to use your dynamic maps.
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Line of Sight Analysis
One of the big problems that the wind indusrty has run into in developing wind farms is that people do not want to see the towers. You can use some very expensive software to do a viewshed analysis, but I have found a very afforable alternative. Global Mapper has a built in function to be able to download elevation data from the web and then with a simple puch of a button to run the analysis. You can customize the variables for the tower height and even look at the terrain in 3D. I use have the expensive software (I am sure you know which one I mean) and it is not this easy to perform a line of sight. Global Mapper also has many other great features and the ability to work with a huge variety of file formats, mainly ESRI shapefiles, KML, and Mr. SID imagery. If you think that Global Mapper could be useful, you can download it free to try it out.
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The National Map Seamless Server
The National Map Seamless Server has a lot of useful GIS data. One of the best aspects is that they have ortho imagery that you can download in various formats so that you do not have to convert images if you do not have the ability to view a specific format. This is very useful to those that are using open source GIS software and do not have mr. sid viewers. Here is some links to the GIS data that is available for download.
1 meter Orthoimagery
Bureau of Transportation Statistics (BTS) Roads
Digital Raster Graphic (DRG)
High Resolution Orthoimagery
Landsat Mosaic Orthoimagery
List of High Resolution Orthoimagery Areas
LP DAAC MODIS
Modis NDVI Direct Broadcast
National Atlas
National Elevation Dataset (NED)
1 Arc Second
1/3 Arc Second
1/9 Arc Second
National LandCover Dataset (NLCD)
1992
2001
Shuttle Radar Topography Mission (SRTM)
1 Arc Second
3 Arc Second
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