# Category: ImageMagick

# Landscape Position Continued– Median and ImageMagick

Highlighting ridges with 250ft buffer (on 2.5ft DEM) with just ImageMagick: convert lscape_posit.png -median 100 median100.png composite -compose difference lscape_posit.png median100.png difference_median100.png Input: Output: BTW, median calculations of this size are slow, even in ImageMagick. Continue reading Landscape Position Continued– Median and ImageMagick

# Landscape Position Continued– absolutely relative position calculation

I apologize in advance– this first post will be heavy on code, short on explanation. Landscape position, e.g. previous posts, can be trivial to calculate, but to make the calculations scalable to a large area, some batching is necessary. In this case, instead of a McNab index, we’re calculating the traditional GIS landscape position. Enter my favorite non-geographic tool, PovRay… . To the difference between, … Continue reading Landscape Position Continued– absolutely relative position calculation