New answers tagged geotiff
In general, you may simply enable the GDAL-internal geotiff: ./configure \ --with-geotiff=internal --with-libtiff=internal ... Rationale: Citation from the manual page: "When built with internal libtiff or with libtiff >= 4.0, GDAL also supports reading and writing BigTIFF files (evolution of the TIFF format to support files larger than 4 GB)."
I've had similar issues with gdalwarp producing black strips around image edges. Usually these happen around the international dateline, but your edges appear to be around the central meridian instead so it's no wonder you wind up with an empty strip in the middle of the output GeoTIFF. Try playing around with the -wo SOURCE_EXTRA=XXX argument. Depending ...
Yes, you can make Geospatial PDF from QGIS raster maps to Avenza PDF map. If you have vector layers you can save the QGIS map to an Image (Projects > Save as Image...). Use this image as input in a Geospatial PDF convertion from menu Raster > Convertion > Translate (Convert Format)... Upload PDF to Avenza PDF Maps. I use Android, don't know the dark ...
You should be able to export from QGIS as a geotiff and that can then be brought into PDF Maps.
The units of the extent will inherit from the units of the projection of the data, so to convert the extent to lat/long, you would need to reproject your data to a geographic projection (usually WGS1984) that uses degrees as units. Your data appears to have been projected to NAD27 / UTM zone 11N, which has units of meters. The extent refers to the x and y ...
In fact you can turn the GeoTIFF files into an OpenLayers base map with the help of MapTiler software (http://www.maptiler.com/). Once the GeoTIFF file is processed with the software on your desktop - you get a directory with JPEG/PNG tiles together with a sample viewer made using OpenLayers. Such a viewer and the folder with tiles can be uploaded to any ...
The MapTiler (http://www.maptiler.com/) can be used to turn any GeoTIFF or an image with world file into a Google Maps overlay or into standalone web viewer with OpenLayers. You just have to drag&drop the file into MapTiler and choose what sort of tiles you want to generate (if standard Mercator tiles a la Google Maps or tiles in local coordinate system ...
I posted a python script to use from ArcGIS here: Exporting 3GB ArcGIS Raster to KML without losing resolution? The different models support different numbers of tiles. You have to look at this limitation, the extent of imagery you want to use, and the minimum resolution you want to use. Then you need to possibly create multiple files from your original ...
I don't think that Adobe Illustrator can read UInt16 data, so you have to rescale your raster first with r.rescale to 0-255 values and then export it with r.out.gdal with option type=Byte to Byte datatype.
Using the GRASS r.out.gdal module, you specify createopt="TFW=YES" to get a *.tfw world file. When exporting with type=UInt16 you should also get the proper colors saved into the geotiff. (I don't know specifically if Adobe iluustrator will read those tif color ramp headers)
All GRASS color tables formats (v.6.4) are in this link: https://svn.osgeo.org/grass/grass/branches/releasebranch_6_4/lib/gis/colors/ If you have GRASS 6.4 in Linux, they are in /usr/lib/grass64/etc/colors. For example, if you used the elevation table, this is the format: 0% 0 191 191 20% 0 255 0 40% 255 255 0 60% 255 127 0 80% 191 127 ...
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