raster conversion for GIS work

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0
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2answers
269 views

ArcGIS: Export GRID to TIFF keeping its (classified) symbology

I want to export an esri grid-raster into a *.tiff without losing the symbology I created for the grid (the symbology is classified). No matter how I try to solve it I get a stretched symbology in ...
2
votes
2answers
2k views

How to convert .geotiff --> .tiff?

How to convert .geotiff files to .tiff files (ordinary plain images)? Basically, I have cropped the image to a rectangle of interest and knowing its left-lower location and having chosen the pixel ...
3
votes
1answer
52 views

Create conditional to check if raster has value

I have a problem with this code: ac = ExtractByMask(raster, "area.shp") arcpy.RasterToPoint_conversion(ac, "point.shp", "VALUE") The problem is that sometimes the raster has no value. (It's a flow ...
1
vote
1answer
111 views

QGIS 2.2 Raster Merge losing color data

I'm trying to merge a couple of GeoTiff maps using Raster > Miscellaneous > Merge but the merge is only coming out in grayscale. The geotifs are using palettes color. How do I get the merge to keep ...
2
votes
2answers
105 views

Exporting 16 bit single-band to 8 bit in SAGA/QGIS

Everytime with every function (e.g convert data storage type or gdal-translat -ot Byte) the output is a completely white map with a black border. only the "save as" export works, but the TIFF also ...
0
votes
2answers
108 views

Low resolution raster conversions to vector yielding millions of single pixel polygons. Trying to merge all directly adjacent polygons

I'm trying to scan plain pdf maps containing color-coded geographic regions and convert them into undifferentiated (I don't actually need them to contain any attribute data) overlays. My workflow is ...