2025-09-02, 15:30–17:00 (Europe/Amsterdam), Expert Room 3
Digital Elevation Model provides knowledge of topography, hydrology, geomorphology. Geomorphometry is a domain to extract the land surface parameters from DEMs. This tutorial introduces leveraging the state-of-art geo-processing softwares to create spatial information from DEMs.
The tutorial starts with the introduction of DEMs and provides a first fully opened ~30m digital terrain model as the material. A single COG DTM would be provided and the code to crop the small area of interest. Aftermath, we will run the geo-processing from GRASS and WhiteboxTools.
The first part is local land surface parameters such as slope, hillshade, and northerness, etc. Equi7 projection system is implemented to create accurate parameters.
The second part is regional surface parameters. We focus on running topographic wetness index, which involves generating specific catchment area and slope. The border effect would be introduced and we introduce the overlapping technique.
Last but not least, we would provide the 15 land surface parameters of the world in COG for comparison with the generated result.
Other links:
https://docs.google.com/presentation/d/1xNoDH3HRkFhm7laYPmtit6j3fuPrEuAJoUnLoczcGC8/edit?usp=drive_link
https://differ.blog/p/access-openlandmap-gedi-via-cloud-native-geo-parquet-827a51
Research Assistant | Geoinformatician at OpenGeoHub Foundation, focus on big data analysis and processing
Mustafa Serkan Isik is a post-doctoral researcher at the OpenGeoHub Foundation, focusing on time-series analysis of Earth Observation data and space-time modelling. He holds a PhD in Geomatics and has a background in geodesy and remote sensing.