Tagged Questions
1
vote
0answers
26 views
QGis Grid statistics for polygons error - Module caused access violation!
I'm trying to calculate statistics for a raster layer using an overlaying polygon layer, I'm using SAGA "Grid Statistics for polygons" function, but it returns an error, sadly.. So in the sextante log ...
3
votes
1answer
49 views
Differences in raster extents in gdalinfo, SAGA & Quantum after resampling
I recently resampled a raster file using SAGA's Resampling module. The aim was to widen the extent of the new raster to two decimal places, where the original raster has three decimal places. The ...
0
votes
2answers
209 views
how to convert grid from Saga gis to have raster in Arcgis?
i am new in Saga Gis, i created grid- LS factor (from Rusle equation for erosis) in Saga gis and now i need to "put" it to Arcgis. How can i do this? I tried a lot of possibilities and none of them ...
4
votes
1answer
134 views
How can I avoid reprojection gaps when merging DEM rasters?
I have two raster DEMs in same resolution I want to bring together. I was using the merge-function in SAGA, GRASS and QGIS but I always get the following result:
What do I need? Where could the ...
1
vote
2answers
126 views
SAGA-GIS Produces different results in command line than GUI
I have been working on a lidar processing workflow using SAGA-GIS. I determined my workflow on a single tile in the SAGA GUI and now I need to batch the operations on 100 more tiles. I wrote a batch ...
4
votes
1answer
164 views
Stripes in Landsat-image after topographic correction (SAGA)
I got stripes in my topographic corrected Landsat images (see second image below).
I used SAGA GIS 2.0.8 at xubuntu 12.04
Image and DEM are in the same projection, tried it with EPSG:32636 and ...
6
votes
3answers
2k views
How to calculate raster statistics for polygons?
how can I calculate sums, averages etc of raster-points (multi-band) per polygon of a vector-layer. I was told that this is called "zonal statistics". I tried that with QGIS first.
There is a way to ...
