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| GeoCommunity Mailing List |
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| Subject: | Re: [gislist] srtm3 projection |
| Date: |
04/17/2004 01:05:01 AM |
| From: |
Dan CRACIUN |
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Thanks Vassil, that little piece of software is awsome.
Cheers,
Dan CRACIUN
Vassil Vassilev wrote:
> Hi Dan,
> I have never tried to follow the instructions given how to import SRTM
> data.
> But I did the following:
> Download from
> www.visualizationsoftware.com/3dem.html
> the 3dem software. It is free. This software could import HGT files
> and then exports them as GeoTIFF - no problem.
> And something more this software fills the gaps (errors) in the SRTM
> data.
>
> Hope it helps - with me it was OK.
> V. Vassilev
>
>> From: Dan CRACIUN <dcsquare@myrealbox.com>
>> To: gislist@lists.geocomm.com
>> Subject: [gislist] srtm3 projection
>> Date: Thu, 15 Apr 2004 11:02:47 +0300
>>
>> Hi listers,
>>
>> Back to work, back to the same problem. The specs for srtm3 say that
>> the projection is geographic WGS1984.
>>
>> So after I convert the .bil to grid, I went into ArcCatalog and
>> assigned WGS_1984 as the projection. Then when I add the grid in
>> ArcMap I get the scale of 1:653.957.328 !!!! OK, so that doesn't work.
>>
>> I assigned the WGS1984 projection directly to the .bil and tried to
>> import that. The scale is correct this time (1:108.902), but...
>> ArcMap doesn't display anything. So this doesn't work either.
>>
>> I've tried both types of .prj:
>>
>> the one created by ArcGis
>>
>> GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]
>>
>>
>> and the one that is in the gtopo distribution:
>>
>> Projection GEOGRAPHIC
>> Datum WGS84
>> Zunits METERS
>> Units DD
>> Spheroid WGS84
>> Xshift 0.0000000000
>> Yshift 0.0000000000
>> Parameters
>>
>> None works.
>>
>> Any ideas?
>>
>> TIA,
>>
>> Dan CRACIUN
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>
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