Geomorpho90m, empirical evaluation and accuracy assessment of global high-resolution geomorphometric layers
| Main Authors: | Giuseppe Amatulli, Daniel Mc-Inerney, Tushar Sethi, Peter Strobl, Sami Domisch |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 2018
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/1806849 |
Daftar Isi:
- Topographical relief comprises the vertical and horizontal variations of the Earth’s terrain and drives processes in geomorphology, biogeography, climatology, hydrology and ecology. Its characterisation and assessment, through geomorphometry and feature extraction, is fundamental to numerous environmental modelling and simulation analyses. We, therefore, developed the Geomorpho90m global dataset comprising of different geomorphometric features derived from the MERIT-Digital Elevation Model (DEM) - the best global, high-resolution DEM available. The fully-standardised 26 geomorphometric variables consist of layers that describe the (i) rate of change across the elevation gradient, using first and second derivatives, (ii) ruggedness, and (iii) geomorphological forms. The Geomorpho90m variables are available at 3 (~90 m) and 7.5 arc-second (~250 m) resolutions under the WGS84 geodetic datum, and 100 m spatial resolution under the Equi7 projection. They are useful for modelling applications in fields such as geomorphology, geology, hydrology, ecology and biogeography. Publication https://www.nature.com/articles/s41597-020-0479-6
- Geomorphometric layers (second order derivative) base on MERIT-DEM computed at 100 m under Equi7 projection and then re-sampled at 7.5 arc-second (~250m) under WGS84 geographic coordinate system. Higher resolution (~90m) available at https://portal.opentopography.org/dataspace/dataset?opentopoID=OTDS.012020.4326.1 Technical documentation available at http://www.spatial-ecology.net/dokuwiki/doku.php?id=topovar90m