I am running TPI on an elevation raster for an island (England). Depending what the window is for the TPI calculation, I seem to get no data at the coastline - if i use 250m it is fairly narrow
- if i use 1000m it becomes quite wide. Please is there a way to ensure the moving window or the output fills to the edges. Output pictures shown are at 1 pixel = 1 hectare. Thank you.
tpi250 <- tpi(ELEVATION, win = "circle", scale=250, zero.correct = TRUE)
tpi1000 <- tpi(ELEVATION, win = "circle", scale=1000, zero.correct = TRUE)
