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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Python Script Zonal Stats as Table Loop Question

I'm trying to write a small script loop script which retrieves rasters from each folder, performs zonal statistics using watershed polygons and saves it as a table. I've written similar loop scripts, ...
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2answers
852 views

ArcGIS Multiband Raster [duplicate]

I know this has been asked and answered here but since I don't have enough rep to ask a clarifying question to the person who answered it I am having to post a completely different question. I am ...
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3answers
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ArcGIS 10.3 Build Raster Attribute Table fails for large rasters

I am looking at forest loss in Central and South America within protected and unprotected areas. So I have a binary raster (0 or 1) for forest in 2000 and another raster for forest in 2013. I want to ...
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Zonal Statistics As A Table missing Features in Results?

I have a point shapefile that includes parcel centroid features across a county in Pennsylvania. I am trying to get a sense of the percentage of forest land within half-mile and mile buffers around ...
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91 views

Function to count pixels within polygons with a given attribute in Google Earth Engine

I am working with the Hansen Global Forest Change loss year layer. This raster tells us the year a 30m pixel transitioned to zero forest cover (2000-2014), if relevant (otherwise zero). I am producing ...
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1answer
376 views

Multiple Output for Zonal Statistics as Table [closed]

I am trying to merge NDVI data from 2005 to 2018 (two .tif per decade) with a region land use. For this, I have used "iterate rasters" with 36 of .tif I'll be using, as the 'Input value raster' of ...
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1answer
406 views

Looping zonal statistics in QGIS?

Has anybody successfully used Zonal statistics in a loop in QGIS 3.8? I have to go through several rasters using a vector file. Batch processing seems to fail in QGIS 3.8 too - see Zonal statistics ...
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2answers
351 views

Calculating Centroids with Zonal Geometry in ArcGIS

I have a shapefile containing polygons. Each polygon is defined by its postal code. I want to calculate the centroid of each polygon using Zonal Geometry. Sadly, for some polygons there are no ...
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1answer
887 views

Calculating first quartile of a raster by zonal statistics?

I want to calculate the 1st quartile (25th percentile) of a raster (beneath polygons) using zonal statistics but it does not this option. Zonal statistics has: MIN, MAX, MEAN, MAJORITY, RANGE, and ...
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1answer
363 views

Missing buffer values when using zonal statistics in ArcGIS Desktop?

I am using zonal statistics in ArcGis 10.2.2 to calculate the mean value of fire frequency within 1km buffers. However, I have noticed that this is not being calculated for all of my sites. There are ...
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580 views

Zonal statistics results in some NULL values in QGIS?

I used zonal statistics through QGIS to assign raster image values to polygons. Here, Raster image has value in range from 0 to 238.567. As a result, some NULL values are assigned to polygons, even ...

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