Data Sources

Transmission data in GIS form is protected for national security reasons. Thus, we were unable to obtain adequate data for this analysis. However, we were able to obtain one publicly available data file, downloaded from the California State BLM GIS webpage (http://www.blm.gov/ca/gis/). While this file does not contain complete transmission line data, it is used here as a proxy. Data for the slope analysis came from a digital elevation model (DEM) with 30 square meter resolution, obtained from the USGS National Map Seamless Server (http://seamless.usgs.gov).