Thursday, April 9, 2015

US Ground Conductivity Map

Have been doing a lot of work this winter on the various mediumwave FCC databases. I've also torn apart the published Canadian database offered by Industry Canada, and added all licensed entries to the combined database which I keep. Primarily the work this winter has been constructing groundwave and skywave pattern plots for all stations.

In the process of doing this, I also tidied up the FCC's M3 sequence file, which defines the distinct areas of ground conductivity across mainland U.S., Hawaii, Canada, and Mexico. Missing Great Lakes summer conductivities were also ferreted out from other sources. With that in hand, I created a nice Google-based HTML map of U.S. ground conductivities and thought I would share it with you. It's fully zoomable like all Google maps.

It can be downloaded from the link at the upper right of this blog. It's self-contained like my pattern maps. Unzip the file and click on the HTML file to view.

Hope you enjoy it.

Static rendering of the FCC's M3 ground conductivity map.