Viewshed
tr_viewshed
What it does
What observers see (forward), where a target is seen from (reverse), or how many sampled targets each cell sees (coverage), with earth curvature and refraction.
Like Viewshed / Viewshed 2 / Visibility (Spatial Analyst) in ArcGIS Pro and Viewshed (GRASS r.viewshed, Visibility Analysis plugin) 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.
Viewsheds from up to 5 dominant heights
Visible from 5 observer(s): 57.3% of the ground within 10000 m (244.812 km2); k = 0.13.
Parameters
| Parameter | Value |
|---|---|
| cell_size_m | 30 |
| observers | auto:5 (the 5 dominant heights of the area) |
| radius_m | 1e+04 |
Numbers
| Measure | Value |
|---|---|
| mode | forward |
| visible_frac | 0.5732 |
| visible_area_m2 | 244,811,700 |
| visible_cells | 272,013 |
| cells_in_range | 474,581 |
| cells_with_elevation | 474,581 |
| missing_cells | 0 |
| unknown_cells | 0 |
| k | 0.13 |
| method | sweep |
| radius_m | 1e+04 |
| 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
- observers: on the dominant heights DH-1 (2,456 m), DH-2 (2,080 m), DH-3 (2,046 m), DH-4 (2,027 m), DH-5 (2,026 m)
- the grid (30 m) is finer than the DEM (30.9 m): values between DEM samples are interpolated
- bare earth; vegetation and buildings not modeled
