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U.S. Electric Transmission GIS Shapefile Map Layer

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About GIS Maps: Maps are critical to our understanding of the effects and impacts of climate change and how we will adapt. You can create your own maps using the GIS shapefiles below. If you are new to GIS and mapmaking, check this brief introduction. Using this free tutorial, learn to make your own GIS maps. Lastly, there are plenty of free GIS software programs available as well as many free ArcGIS shapefiles you can use to create your maps.


U.S. Electric Transmission Shapefile - NREL received this data from the Federal Emergency Management Agency (FEMA) sometime around 1993. It is our understanding that the data represents a schematic of transmission line connectivity. This is based on conversations with people at FEMA, utility companies, and others familiar with actual transmission routing. The data can appropriately be used to show whether there is or is not a transmission line of some stated voltage in some general area. The user should not use the data for analysis that would require actual knowledge of easement locations. This coverage is undocumented and has not been updated.

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