| Re: converting Lat/Long to UK Ordnance Survey National Grid Reference (NGR) [message #17162] |
Wed, 15 September 1999 00:00 |
Ben Tupper
Messages: 186
Registered: August 1999
|
Senior Member |
|
|
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Paul Morris wrote:
<blockquote TYPE=CITE>I was wondering if anyone had an IDL routine available
to take latitude and
<br>longitude co-ordinates and convert them to UK Ordnance Survey Eastings
and
<br>Northings? I have found some C code to do the conversion but was hoping
to
<br>avoid using CALL_EXTERNAL if I possibly can! I have searched for a
suitable
<br>IDL library or user-written routine but with no success.
<br> </blockquote>
<p><br>I have written some code for converting from Lat/lon to UTM False
Eastings/Northings for NAD27 and WGS84 (NAD83) map datums. You welcome
to have them if useful to you. In any event, you should get your
hands on this reference: Snyder, J.P., "MapProjections Used by the U.S.
Geological Survey", 2nd ed., Geol. Survey Bulletin 1532, 313pp, U.S. Government
Printing Office, Washington, DC, 1982. It has detailed
explanantions of mapping datums and conversion methods. I don't
recall if it has info on mapping systems used outside of North America.
<br>
<br>
<pre>--
Ben Tupper
Bigelow Laboratory for Ocean Science
tupper@seadas.bigelow.org
Pemaquid River Company
pemaquidriver@tidewater.net</pre>
</html>
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
