Questions tagged [zonal-statistics]
Zonal statistics summarize the values of one raster within the zones of another dataset (either raster or vector) and output the results as a raster (for a single statistic) or table (for multiple statistics).
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Manual replication of exact extract results
I am trying to better understand how exact extract works.
For this reason, I am trying to manually replicate the results obtained by this function.
Consider the following toy example. I create the ...
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ArcGIS Pro Zonal Statistics not working properly
I am trying to use Zonal Statistics to determine the highest point within polygons. I previously did this in ArcMap w/o problems, but now I am finding that certain polygons are only partially ...
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Information in addition to Raster zonal statistics
I have a layer of polygons and a DSM. I want to know if I can extract average aspect, slope, and elevation statistics all at once in QGIS. I know another software does this but I forgot the name.
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QGIS Zonal Statistics Crashing
I am trying to run zonal statistics to assign elevation to ungauged nodes (point data, 130000 points) across Ireland. I have converted the point data to a polygon to run the zonal statistics. When ...
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Getting negative values after a zonal_stats in Python
I have a shapefile with overlapping polygons and raster data about suitability, both of them have the same CRS.
I would like to summarize some statistics on my polygons, using the "all touched&...
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Zonal statistics batch process using QGIS
I am working with QGIS 3.34.3-Prizren and I carried out a rasteranalysis using zonal statistics batch process. I have some problems choosing the right autofill settings for the column spatial ...
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ReducetoVectors in Google Earth Engine not working with the Mollweide transformation. Need to calculate zonal statistics for global scale analysis
My study is a global-scale analysis of the factors driving forest gain, with grid cells as the unit of analysis. I need to calculate the amount of forest gain per ~65km2 hexagonal grid cell at the ...
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Performing a zonal statistics looping over rasters and over polygons
I have a shapefile with overlapping polygons and a set of rasters. I would like to summarize some statistics on my polygons. However, as my polygons are overlapping, to avoid issues with zonal_stats, ...
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Iterating over the features of a vector layor then performing zonal statistics algorithm on each feature in PyQGIS
I composed this script in PyQGIS to perform the zonal statistics on a vector layer as for all its features at once, it works perfectly, when the script is finished, I inspected the attribute table and ...
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How to get zonal statistics of a vector map by areas from another vector map in GRASS GIS?
I have a map with areas (polygons) and another map with lines for example. Lines have multiple attributes and I want some of them to be summed and written to new columns of my areas map. Each polygon ...
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Earth Engine Zonal Stats export table error message
I am trying to calculate zonal statistics of vegetation indices (Sentinel 2) for each week in 2023 and export the results in a wide table format (.csv). For the specific region, I am using points data....
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Zonal statistics over Trend Raster [closed]
I have a raster containing Mann-Kendall trend values and p-values for each pixel. Essentially, I possess both the magnitude of the trend and the corresponding significance level per pixel. I aim to ...
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Selecting a subset of features from feature collection in reduceRegions()
In an attempt to find ndvi and gndvi over a geometry containing 160 polygons, I have the following code.
var s2 = ee.ImageCollection('COPERNICUS/S2_HARMONIZED');
var geometry = ee.FeatureCollection('...
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Zonal Statistics in QGIS
I am using raster layer zonal statistics in QGIS. I want to quantify the water yield contribution of each LULC class, but the results of the zonal statistics is greater than the value given by the ...
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Zonal statistics
I am using Python on Visual Code Studio. Basically, I have two raster images, GHS SMOD (which classifies areas into 8 catergories of urban) and GHS POP (which uses world pop to calculate population). ...
