I have a DEM of Saint Lucia, obtained from the CHARIM database. It is a large geotiff (150MB), and I would like to crop it as I only need a small part of it. I have been trying to use
Raster -> Extraction -> Clipper in QGIS, but it fails because it says I need thousands of TB of disk space to complete the operation. From reading around, I presume that this is because the file is already compressed, however I don't really know how to go about solving it.
This is the layer metadata:
GDAL provider GTiff GeoTIFF Dataset Description /Users/cameron/Desktop/Design IV/St Lucia GIS/topography.tiff AREA_OR_POINT=Area TIFFTAG_RESOLUTIONUNIT=1 (unitless) TIFFTAG_XRESOLUTION=1 TIFFTAG_YRESOLUTION=1 Band 1 STATISTICS_MAXIMUM=779.13000488281 STATISTICS_MEAN=nan STATISTICS_MINIMUM=-inf STATISTICS_STDDEV=nan Dimensions X: 4536 Y: 8763 Bands: 1 Origin -61.0813,14.1115 Pixel Size 4.61889e-05,-4.61889e-05 No Data Value -1e+38 Data Type Float32 - Thirty two bit floating point Pyramid overviews Layer Spatial Reference System +proj=longlat +datum=WGS84 +no_defs Layer Extent (layer original source projection) -61.0812601912316993,13.7067470580471564 : -60.8717473436720837,14.1115003832598784 Band Band 1 Band No 1 No Stats No stats collected yet
Can anyone tell me what I should be doing instead? I am relatively new to GIS and this is the first thing I have come across that I can't immediately find my way around.
EDIT: The Clipper settings are as follows:
gdal_translate -projwin 507118.619912 1549423.97735 511757.851837 1546542.77015 -of GTiff
And the error log:
Warning 1: Computed -srcwin 1.09806e+10 -3.35451e+10 1.0044e+08 6.23788e+07 falls completely outside raster extent. Going on however. ERROR 3: Free disk space available is 8291942400 bytes, whereas 25061401106245716 are at least necessary.`