[IRCA] Fwd: Topband: FCC Map of Ground Conductivity in US

[Nick Hall-Patch <nhp@xxxxxxxx>]

Just in case you have a wall that is bare and just begging for 
nerdish covering, behold, the FCC offers a printable 43x69-inch map 
(in many sheets) of ground conductivity in the US (info from Topband 
Reflector; see below).   There is also a text file of ground 
conductivities for the western hemisphere, including such hot beds of 
DX as Gabriola Island and Mayne Island.   I haven't quite figured out 
what all the numbers and locations mean however, or where the data 
originates.  Does anyone know?

best wishes,

Nick




>         From:
>
>
> http://www.radiomagonline.com/fcc/0019/fcc-reveals-m3-map-of-ground-conductivity-in-us/37366
> [1]
>
>         FCC M3 Map of Ground Conductivity in US
>
>         Commission offering printable 43x69-inch map
>
>         January 28, 2016
>
>         The map shows that ground conductivity across the U.S. ranges from
> 0.5 to 30 millimhos (or millisiemens) per meter. The FCC also reports
> that the conductivity of seawater is 5,000 millimhos per meter.
>
>         The downloadable map comes in 48 portions that can be printed.
>
>         https://www.fcc.gov/media/radio/m3-ground-conductivity-map [2]
>
>         The FCC is also offering the conductivity data as text files and also
> includes data for the Chesapeake Bay and Puget Sound, which is not
> shown on the printable map.


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