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About the Data Datasets available for download through the Wyoming BLM clearinghouse are available in two formats: Arc/Info export format and ArcView shapefile format. Arc/Info is the proprietary GIS software that this data was developed in, and is available from ESRI. Both export files and shapefiles can be brought into ARC/INFO, ArcView, and several other GIS software systems. Shapefile format can also brought into ArcExplorer, ESRI's free data explorer. Because some statewide datasets may be extremely large and slow to process, they are also provided in smaller-areas tiles, either by counties (23 in Wyoming), by 30 by 60 minute quadrangle (56 in Wyoming), or by 7.5 minute quadrangles. Most of datasets are in latitude/longitude (decimal degrees), North American Datum 1983, unless otherwise noted. Check the Spatial Reference Information section of the dataset's metadata document to find out its projection and datum information. Most GIS software packages can easily convert decimal degrees into other projections. In ArcView, data in decimal degrees can be projected "on the fly" simply by selecting the desired projection from off a menu. The ArcView Projector extension can also be used to perform permanent projection changes, which is necessary in order to overlay datasets in different projections. |
Steps for Downloading the Data
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Steps for Importing the Data |
ARC/INFO users
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ArcView users
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Created by BLM Wyoming Contact: |
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www.wy.blm.gov/gis/aboutgis.html This is a US Government computer |