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Maproom / qmapshack

Consumer grade GIS software
GNU General Public License v3.0
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Sonny Lidar 0,5" with QMS #590

Open siouxme opened 1 year ago

siouxme commented 1 year ago

Describe the bug

comment: # VRT Builder does not accept DEM data based on 0,5" from Sonny

What have you done to circle down the problem?

comment: # 1" DEM data works, 0,5" DEM cannot be converted

To Reproduce

  1. Go to '...'
  2. Scroll down to Austria
  3. Download DEM 0,5" https://bit.ly/dtm-austria-05s-v2
  4. open QMS VRT Build with such a file and try to convert
  5. see error msg

Expected behavior

comment: # should work as with 1" DEM data

Desktop

wthaem commented 1 year ago

Most likely not a QMS but a GDAL issue. gdalinfo.exe reports

gdalinfo.exe d:\GPS\N49E014.hgt <==== one of the 0.5'' DEM files! ERROR 4: d:\GPS\N49E014.hgt not recognized as a supported file format.

Compare also GDAL driver capabilities at

https://gdal.org/drivers/raster/srtmhgt.html

HGT file sizes the driver can handle:

3601 3601 3601 3601 2 3601 3601 4 1801 3601 2 1201 1201 * 2

HGT file mentioned above has size 7201 7201 2. Compare _Readme.txt in HGT.ZIP