Segmenting Topography with LandSerf and RSGISLib
Tags: SRTMRSGISLibLandserfobject-based segmentationDTM03 Aug 2014 - MawKernewek
As a training for segmenting Martian topography, I have done a little work on Earth.
Using the software LandSerf by Prof. Jo Wood (the website www.landserf.org appears to be down at the moment), I created a number of derived topograhic layers from Shuttle Radar Topography mission data, i.e. slope, aspect, and plan, longitudinal, cross-sectional, profile and mean curvature. I then layerstacked these files (taking the aspect in degrees from north-facing).
Using RSGISlib to segment these (using min 128px sized objects where a pixel is ~ 72m) I get results like this:
The curvature layers seem to enable it to segment along ridge and valley lines and it can sometimes be seen how the topography is orientated spatially.
Using the software LandSerf by Prof. Jo Wood (the website www.landserf.org appears to be down at the moment), I created a number of derived topograhic layers from Shuttle Radar Topography mission data, i.e. slope, aspect, and plan, longitudinal, cross-sectional, profile and mean curvature. I then layerstacked these files (taking the aspect in degrees from north-facing).
Using RSGISlib to segment these (using min 128px sized objects where a pixel is ~ 72m) I get results like this:
The curvature layers seem to enable it to segment along ridge and valley lines and it can sometimes be seen how the topography is orientated spatially.