[gdal-dev] Problem using gdal_contour after gdal_merge.py

[Andre Joost]

Am 22.03.2014 18:59, schrieb Tom Beddard:

> Are there any tricks to generating contours from merged files or is
> it just going to be a case of scripting the generation of lots of
> .shp contour files from each of the elevation tiles?
>
>
> Thanks for any help, I’m still on the steep bit of the learning curve
> with all of this :)
>
>


The SRTM data is in EPSG:4326, so I suggest to do the merging and 
contour creating in that CRS. Reprojecting of rasters always causes 
nasty edges, and the contour process might stumble upon that.

HTH,
André Joost