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location Missoula, MT
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Apr
11
revised Calculate Number Of Pixels Visible From Pixel
wrong output
Apr
11
comment Calculate Number Of Pixels Visible From Pixel
Also it has a small(ish) memory footprint, on the order of three lines from the dem.
Apr
11
answered Calculate Number Of Pixels Visible From Pixel
Mar
17
answered Is there a way for multiple users to use an SQLite/SpatiaLite db simultaneously?
Feb
14
comment Sqlite, Python 2.7 and Spatialite
What are the details of your binaries? Are you using Arc built python and/or spatialite? How new is the spatialite build? Are spatialites dependencies available(geos, iconv, etc)?
Feb
7
comment Update a NetCDF file using GDAL
You can't really. I don't think you want to use GDAL for your netcdf access. GDAL only works on netcdf files that follow GDALDatasets schema (all bands are the same). Maybe try libnetcdf.
Feb
5
comment Update a NetCDF file using GDAL
Update support has not been implemented. You could create a new one, using Create or CreateCopy(), but no in place updating.
Feb
5
comment Recommended programming language for remote sensing?
+1 on python. It's a general purpose language, and if you need to use tools that may fall 'out of the box' withing GIS scripting, python can do it.
Jan
27
comment GDAL: Convert specific RGB (GeoTIFF) color to transparent
It's a shortcoming (or not) of the geotiff format/driver, it looks like you submitted the ticket: trac.osgeo.org/gdal/ticket/2083
Jan
27
comment GDAL: Convert specific RGB (GeoTIFF) color to transparent
This won't work for GeoTiffs, at least persistently. GeoTiffs can't have different Nodata values for different bands. If you close the dataset and re-open it, all the no data values will be 247. You may need to wrap it with a vrt to get it to work.
Jan
24
comment Choose what zoomlevel to read from for mbtiles file in GDAL
The lower zoom levels are probably registered as overviews. How are you accessing the data? Normal overview access should work (in RasterIO) or maybe GDALRasterBand::GetOverview() (although I've never used that fx).
Jan
15
answered How do I use wildcards to work around the GDAL character limit?
Jan
15
comment QGIS not interpreting Lambert Conformal Conic projection correctly
Checked in to the trunk. Should be available in dev builds tomorrow.
Jan
9
comment GDAL/proj4 equirectangular projection coordinate system units assumed by OGRSpatialReference and GDALDataset::GetGeoTransform()?
AutoCreateWarpedVRT is a simplified implementation of the warp API. There is very little control over what it does, but if it works, it works. I think WarpOptions are passed through, and band mapping is supported, but little more.
Jan
3
comment Weather conditions forecasting / interpolation
[windninja](windninja.firemodels.org) may be useful. It simulates the affect that terrain has on wind. It' s usually used for fire behavior modeling. It's free.
Jan
2
comment using GDAL/python to stack georeferenced images of different sizes
gdalbuildvrt is a standalone executable, not a python command, sorry for the confusion. It should be installed with your gdal installation.
Dec
31
comment using GDAL/python to stack georeferenced images of different sizes
That looks right to me. Check the docs page for more info. You may have to quote your input file names in the inputlist.txt if you have spaces. I can't really help without seeing your data :)
Dec
31
comment QGIS not interpreting Lambert Conformal Conic projection correctly
If someone takes a look at the ticket(s) and agrees with my logic, I'll apply it to the trunk and it should get into Tamas' dev build after that. Thanks for the reporting.
Dec
31
comment GDAL/proj4 equirectangular projection coordinate system units assumed by OGRSpatialReference and GDALDataset::GetGeoTransform()?
I'd argue that it's probably not too numerous/large to use gdalwarp, but if you have to do it in C++, try the warp api tutorial. You are mixing projected and geographic coordinate systems, and I suspect that is why some nodes aren't getting set, because they aren't there. Use the warp api and helper functions like GDALGetSuggestedWarpOutput.
Dec
30
comment using GDAL/python to stack georeferenced images of different sizes
No clue. The VRT should work, although you may have to use a numpy masked array to handle no data issues. I've not had to use that much.