![]() ![]() This process allows for the extraction of information from the raster dataset that is relevant to each zone. The statistics are then assigned as attributes to the corresponding polygons. When performing zonal statistics, the GIS software calculates various statistics (such as mean, median, sum, minimum, maximum, range, standard deviation, etc.) of the raster values within each polygon zone. The vector polygon layer represents zones or areas of interest, such as administrative boundaries, land parcels, or habitat areas. The raster dataset typically contains continuous or categorical data, such as elevation, temperature, or land use, and each raster cell has a specific value. The term “zonal” implies that the analysis is done for each zone, which is represented by a polygon, using the underlying raster data. In the context of GIS, Zonal Statistics refers to the process of calculating statistical values based on the spatial relationship between a raster dataset and a set of vector polygons (zones). You can save the updated vector layer as a new file by right-clicking the layer and selecting “Export” > “Save Features As…” and choosing your desired format (e.g., shapefile or GeoJSON). Now, you’ve successfully extracted raster values into polygon attributes.
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