2010/6/14 Gianni Olivieri <[email protected]>: > 2010/6/11 Gianni Olivieri <[email protected]>: >> 2010/6/11 Matt Klaric <[email protected]>: >>> While you certainly can accomplish this using GDAL, you'll need to first >>> figure out which hgt file to open, then translate the geographic coordinate >>> to the image coordinate to know what pixel value to lookup. >>> >>> An alternative solution is OSSIM (http://www.ossim.org/). It has a >>> command-line app called ossim-height. You can use it as follows: > > thanks... I've looked to ossim... but there is a versione for linux? > or only form mac and windows?
I've see the source, I'll try to compile. I need this tool for a hobby/study project... I'd like to create an image of an altitude profile of a path... something like: http://www.heywhatsthat.com/profiler.html but I'd like to do all myself... I've Eurasia maps from SRTM NASA already downloaded. I've looked to mapserver and GDAL and now OSSIM... I'm on a right direction? > >>> >>> $ ossim-height 45 10 >>> Opened cell: /srtm1/N45E010.hgt >>> MSL to ellipsoid delta: 39.049 >>> Height above MSL: 37 >>> Height above ellipsoid: 76.049 >>> Geoid value: 39.049 >> >> thanks for this link, I didn't know this software. >> >> I try this. >> >> Thanks... >> >>> >>> You can setup a configuration file (see: >>> http://trac.osgeo.org/ossim/wiki/ossimElevationSetup) that points to your >>> directory of hgt files and OSSIM will figure out which file is needed for >>> your query. >>> >>> If you're needing to embed this in an application of yours, you can use the >>> OSSIM API to accomplish the same thing. Check out the source for >>> ossim-height for an example of how to do this. >>> >>> --Matt >>> >>> >>> On Fri, Jun 11, 2010 at 9:33 AM, Gianni Olivieri <[email protected]> >>> wrote: >>>> >>>> Hallo, >>>> >>>> I need to extract the altitude of a GPS coordinate from a serie of >>>> HGT (SRTM or DEM) (I've download the entire Eurasia... >>>> >>>> So, for example, If I have a directory with all htg file and I'd like >>>> to know the altitude of this coords: >>>> >>>> 48°01'35.89" N >>>> 8°23'51,86" E >>>> >>>> how can I preceed? >>>> >>>> The elevation in that point is: 761m (google earth result) >>>> I'd like to have a similar results. >>>> >>>> Best regards >>>> >>>> >>>> >>>> -- >>>> Gianni Olivieri >>>> [email protected] >>>> _______________________________________________ >>>> gdal-dev mailing list >>>> [email protected] >>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev >>> >>> >> >> >> >> -- >> Gianni Olivieri >> [email protected] >> > > > > -- > Gianni Olivieri > [email protected] > -- Gianni Olivieri [email protected] _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
