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Re: [Paparazzi-devel] log file UTM to WGS84 convert question

From: Andreas Philipp
Subject: Re: [Paparazzi-devel] log file UTM to WGS84 convert question
Date: Mon, 07 Jul 2014 07:39:35 +0200
User-agent: Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Thunderbird/24.3.0

Hi Kevin,

the letter for the latitudonal 8-degree band (T, R or S) may be calculated after converting UTM to WGS84. It is insignificant for that, since the utm_y is always the distance from the equator. For the utm_x value where you need the zone number (e.g. 50) this is different since it is the distance for the central meridian which depends on the zone. The letter describing the latitudonal band is just cosmetics. You can determine it after conversion to geographical coordinates:

the letters are "CDEFGHJKLMNPQRSTUVWXX" from 80 deg south in increasing order for each 8-deg-band. However there are exceptions over Scandinavia. May be better use a tool like:

linux pakage: proj-bin


Am 07.07.2014 03:17, schrieb afishindouban:
Hi everyone

sorry for bother you, I have a confuse about log file pos covert.

for example one line in a log file could be

130.5000 3 GPS 3 45628136 437386560 2918 20626 5 -6 1799 368074000 50 28

so the utm_x=45628136 utm_y=437386560 utm_zone=50, but it should say 50T,
50R or 50S for I can use UTM2WGS84 convertor. How can I get this information
by a log file ?

Please help me. thanks a lot.


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