[gdal-dev] SRTM maps and altitude...

[Gianni Olivieri]

2010/6/14 Gianni Olivieri <gianni.olivieri at gmail.com>:
> 2010/6/11 Gianni Olivieri <gianni.olivieri at gmail.com>:
>> 2010/6/11 Matt Klaric <matt at klaric.com>:
>>> 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 <gianni.olivieri at gmail.com>
>>> 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
>>>> gianni.olivieri at gmail.com
>>>> _______________________________________________
>>>> gdal-dev mailing list
>>>> gdal-dev at lists.osgeo.org
>>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>
>>>
>>
>>
>>
>> --
>> Gianni Olivieri
>> gianni.olivieri at gmail.com
>>
>
>
>
> --
> Gianni Olivieri
> gianni.olivieri at gmail.com
>



-- 
Gianni Olivieri
gianni.olivieri at gmail.com