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QGIS Model



Compute zero-mean values for polygon regions of interest (ROI) and count pixels below a threshold (default threshold: mean, can be adjusted by an offset). This model was developed for agricultural field trials (ROI were plots) but can be used in other contexts, too.

Inputs: * ROI polygon layer (regions of interest, e.g. field trial plots) * single band image (e.g. surface model, vegetation index) * threshold offset to adjust default mean

The algorithm computes the mean of each ROI, substracts it from the input and thresholds values below (mean+threshold_offset).

Useful to compare relative differences within ROIs.

Atttention: this model converts the inputs to a common metric CRS (UTM, EPSG:25832), this is hardcoded and needs to be changed, if you want to use different one.

Uploaded Date
30 May 2022
Approved Date
20 August 2022
Model File

This Model is made available under the CC-0 license.

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