Tagged Questions

3
votes
2answers
56 views

Buffer of different radius - Intersect with raster

I have a polygon shape with buffers. However, the buffers are of different size from 4m radius to 15m. In total I have 7 different buffers. I have a landcover raster and I would like to extract ...
0
votes
0answers
39 views

R-raster versus ArcMap Bioclim clipped values differ?

I have a set of lat/long ccordinates for which I wanted to pull corresponding BioClim (1-19) values. I first used ArcMap, without interpolating, and came up with a set of data. I then used R's ...
3
votes
3answers
193 views

How to extract raster values and create new raster in Qgis?

I want to extract certain values of a raster image in order to create a new raster which then should only contain the extracted/chosen values. How to do this in QGis?
3
votes
2answers
566 views

Extract raster by mask output does not completely overlap the mask

I have a flow accumulation grid and a shapefile containing catchment areas. Now I want to do some calculations on them so I need to extract data from cells in the raster adjacent to certain catchment ...
0
votes
1answer
147 views

What is the easy way for extracting a dted raster file?

i have some srtm data which was converted to dted file with globalmapper or arcmap ascii to raster. i want to extract raster from vector with easy way.. i have tried "extract by mask" method but it ...