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[aprssig] Need some Coordinate and math help

Tom Russo russo at bogodyn.org
Sun Mar 6 00:43:22 UTC 2005


On Sat, Mar 05, 2005 at 06:46:42PM -0500, we recorded a bogon-computron collision of the <kb2scs at optonline.net> flavor, containing:
> Hi All
>          I am presently working on a new mapping system that uses the 
> USGS DLG 1000k optional format.
> 
> What I need is a mathematical formula to take the UTM coordinates in 
> the DLG file and convert them to Lat and long.

Look at the open source proj4 library, which can do all of that and more, 
and you don't have to code up your own math.  You can find it at
http://www.remotesensing.org/  (look on the right, under "featured links")

I'm curious how you're reading the DLG-O format --- there seem to be no
open-source DLG-O readers, and I have been unable to find any converters to
more open formats that don't cost a couple hundred bucks.

-- 
Tom Russo    KM5VY     SAR502  DM64ux         http://www.swcp.com/~russo/
Tijeras, NM  QRPL#1592 K2#398  SOC#236 AHTB#1 
 "When life gives you lemons, find someone with a paper cut."




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