Re: Convert from ED50 to WGS84
Paul Wessel <[email protected]>
| Newsgroups | gmane.comp.gis.gmt.user |
|---|---|
| Message-ID | <[email protected]> |
You should not have to deal with any projection. Barring bugs it should just be mapproject olddatumfile -TFROM/- > newdatumfile where FROM is the datum ID number from mapproject -Qd. There are many European 1950 listed depending on region, see IDs 54-69. If you have lon, lat, z data then use -Th. -p On Mar 12, 2014, at 11:02 PM, Andreas <[email protected]> wrote: > Hei Maarten, > > So you have to do this conversion through a projection? Why is it not possible to do this purely in the geo domain? > > Thank you for your answer. > > Andreas > > On 13 Mar 2014, at 07:48, Maarten Vanneste <[email protected]> wrote: > >> Hei, >> >> Assume that your coordinates would fall into UTM zone 31, CM3°E, and within the geographical area >> RR=-R0/6/60/62 >> The conversion would be something like this: >> >> mapproject -C -F -Ju33/1:1 $RR yourdata.ed50 -T65/220 | mapproject -C -F -I -Ju33/1:1 -T220/220 > yourdata.wgs84 >> >> You may have to play around with the D_FORMAT parameter, not to lose resolution. >> >> Maarten >> >> >> With best regards / Vennlig hilsen >> Maarten >> >> Dr. Maarten Vanneste >> Offshore Geotechnics Division >> NGI, Oslo - Norway >> www.ngi.no >> >> See also: International Centre for Geohazards >> www.geohazards.no >> >> >> On Wed, Mar 12, 2014 at 6:53 PM, Andreas B <[email protected]> wrote: >> Hey all, >> >> How can I convert a set of lat/lon points in ED50 (International-1924) to WGS84? I guess mapproject is the right tool, but I'm very unsure about the results I'm getting. >> >> Best regards, >> ANdreas >> To unsubscribe, send the message "signoff gmt-help" to [email protected] >> >> To unsubscribe, send the message "signoff gmt-help" to [email protected] > To unsubscribe, send the message "signoff gmt-help" to [email protected] To unsubscribe, send the message "signoff gmt-help" to [email protected]