The topographic position index or TPI:
The topographic position index helps us distinguish topographic features such as a hilltop, valley bottom, exposed ridge, flat plain, upper or lower slope. It is calculated by comparing the elevation of each pixel to its surrounding neighbours.
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For more information refer to this link:
blogs.ubc.ca/t....
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in this video we've shown you how to calculate the TPI in ArcGIS.
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Негізгі бет Topographic Position Index (TPI) in ArcGIS Using DEM
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