[gdal-dev] Opening gridded xyz data that is out of order

[Andreas Neumann]

Hi,

Forgot to mention the link to the file, just in case you have time 
testing - see https://services.geo.zg.ch/temp/dtmav.zip (138 MB zipped 
file).

Thanks,

Andreas


On 11.09.2017 15:43, Andreas Neumann wrote:
> Hi,
>
> I received a DTM from a Swiss province (OpenData) which is of the 
> following format:
>
> One coordinate per line, already gridded. See f.e.
>
> 2708001.00 1218001.00 1541.52
> 2708003.00 1218001.00 1542.35
> 2708005.00 1218001.00 1542.98
> 2708007.00 1218001.00 1543.58
> 2708009.00 1218001.00 1544.20
> 2708011.00 1218001.00 1545.13
> 2708013.00 1218001.00 1545.88
>
> The issue is that further down the file there seems to be an issue of 
> ordering the coordinates. gdalinfo produces the following error:
>
> ERROR 1: Ungridded dataset: At line 4125001, change of Y direction
> gdalinfo failed - unable to open 'DTM_swissALTI3D_XYZ.txt'.
>
> If GDAL could open the data - it would open as ungridded data - right? 
> Issue is, this data is already gridded as you can see above. I 
> actually want to save this is a gridded GeoTIFF file for later usage 
> in QGIS.
>
> Is there still a chance that GDAL can open this data set, even if 
> coordinates are out of order?
>
> How about the gridded vs ungridded aspect of xyz files?
>
> Thanks,
>
> Andreas
>
>
>
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