Ravines and ridges
tr_ravine_ridge
What it does
Ravine lines (drainage of the filled DEM) and ridge lines (the negated DEM), classed with length, catchment, depth or prominence.
Like Stream to Feature + ridge extraction workflow in ArcGIS Pro and GRASS r.stream.extract / SAGA Channel Network in QGIS. Run by the product's terrain engine on 30 m cells from Copernicus DEM GLO-30 (full resolution): 740 x 930 = 688,200 cells; no model was called.
Ravines and ridges
32 ravine line(s) and 7 ridge line(s); ravines drain at least 6.194 km2.
Parameters
| Parameter | Value |
|---|---|
| cell_size_m | 30 |
Numbers
| Measure | Value |
|---|---|
| ravines | 32 |
| ridges | 7 |
| thresholds.ravine_min_catchment_m2 | 6,193,800 |
| thresholds.ridge_min_catchment_m2 | 3,096,900 |
| thresholds.min_length_m | 150 |
| thresholds.relief_radius_m | 120 |
| backend | pure |
| dem.rows | 740 |
| dem.cols | 930 |
| dem.cell_m | 30 |
| dem.crs | EPSG:32737 |
| dem.missing_frac | 0 |
| dem.elev_min_m | 1,562 |
| dem.elev_max_m | 2,456 |
| dem.elev_mean_m | 1,824 |
| dem.relief_m | 894.3 |
| dem_source.kind | copernicus |
| dem_source.native_res_m | 30.91 |
| dem_source.crs | EPSG:4326 |
| dem_source.dataset | Copernicus DEM GLO-30 |
Notes
- DEM: Copernicus DEM GLO-30 (open data; cached). Copernicus DEM GLO-30: produced using Copernicus WorldDEM-30 (c) DLR e.V. 2010-2014 and (c) Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA
- the grid (30 m) is finer than the DEM (30.9 m): values between DEM samples are interpolated