Questions tagged [sample]

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34 views

Sampling list of rasters in ArcPy?

I've been trying several times to sample (Sample tool from Spatial Analysis ArcGis 10.5.1) a list of rasters to a location sample (also in raster format .tif). Here's the code I've been using, and ...
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22 views

Error in sampleStratified() r

I am trying to randomly distribute points in a raster (that has 11 unique values). I followed this posting and was able to recreate it, being partially successful. As mentioned about, my raster has ...
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0answers
109 views

R raster - take stratified sample

This question was posted in stackexchange, where there were no views/comments/answers. I have a raster file and would like to take a stratified sample. library(raster) f = system.file("...
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Kriging with a non-uniform (not space filling with concentrated data in certain regions) sampling design?

I am using Kriging for optimization where local searches are often carried out. However, because of these local searches my sample design becomes poor and my Kriging prediction as well as variance ...
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637 views

Converting table asset data type from 'Long' to 'String'

I am attempting to generate 50 random points per land use class through Google Earth Engine. I have performed this operation before on an earlier instance, where the inputs were the following (1) ...
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208 views

Small sample size for geographically weighted regression; limitations

I am studying West Nile Virus risk factors in a specific county using mosquito surveillance data over a ten year study period. The highest resolution of the mosquito data that could be obtained was at ...
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0answers
94 views

Random Stratified Sample in QGIS and Scale

I need to sample 7 raster layers all 30 m resolution (as some of the remotely sensed products I'm using are Landsat). I have all of my layers ready to go, but I am not sure how I can conduct a ...
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43 views

Randomly Sample Raster Pixels With a Minimum Distance in QGIS

Is there a way I can sample random raster pixels from a satellite image with QGIS or QGIS plugin? I also need each randomly-chosen pixel to have a pre-defined minimum distance from the other raster ...