st_tri
How PostGIS Raster runs Terrain Ruggedness Index: st_tri.
| Engine | PostGIS Raster |
|---|---|
| Tool name | st_tri |
| Interface | sql |
| Implements | Terrain Ruggedness Index |
| Documentation | Not stated |
| Effects | modifies input: no, network: no |
| Notes | Not stated |
| Status | active |
Parameters
| Name | Type | Required | Default | Choices | Note |
|---|---|---|---|---|---|
rast | raster | no | Not stated | Not stated | Not stated |
nband | integer | no | 1 | Not stated | Not stated |
customextent | raster | no | Not stated | Not stated | Not stated |
pixeltype | text | no | '32BF'::text | Not stated | Not stated |
interpolate_nodata | boolean | no | false | Not stated | Not stated |
SQL overloads
-
st_tri(rast raster, nband integer, customextent raster, pixeltype text DEFAULT '32BF'::text, interpolate_nodata boolean DEFAULT false) → raster -
st_tri(rast raster, nband integer DEFAULT 1, pixeltype text DEFAULT '32BF'::text, interpolate_nodata boolean DEFAULT false) → raster
How it maps to the operation
| Operation parameter | Parameter here | Note |
|---|---|---|
raster | rast | Not stated |
algorithm | Not stated | always wilson |
Differences from the operation
- The mean of the absolute differences from the eight neighbours.
Harvested by the postgis harvester from engine version
3.7.0. Names can change when an engine is harvested again.