[time-nuts] question about Thunderbolt geo acuracy

[Jim Lux]

On 5/11/12 5:54 AM, Chuck Harris wrote:
> Go to your local building and planning commission, and get yourself
> a copy of the topographical map for your address. They are cheap, and
> are the standard by which everyone (insurance, zoning, ...) determines
> your flood plane exposure.
>


I have been informed (in the last 5 minutes) that whether you are in a 
flood plain, these days, are determined almost entirely by the 
geographic position of your property on the FEMA flood plain map.  (at 
least as far as lenders and HO insurance goes) FEMAs maps may or may not 
align with USGS maps.  They almost certainly do NOT align with the 
county recorder's maps.

If you're in an area where FEMA doesn't issue maps then it's something 
else, and USGS or local maps may determine.  But I notice from the FEMA 
Flood Map server that they cover even things up in the mountains (e.g. 
Alpine county in California)