Global OpenTopography
- Author: O.Conrad (c) 2025
- Menu: File | Web Services | Global Elevation Data
Description
Download and optionally project global digital elevation model (DEM) data for the area of your interest provided by the OpenTopography project. The download needs a personal API key which can be obtained easily after login at the OpenTopography Data Portal.
Available DEM products are:
- SRTM GL3 90m
- SRTM GL1 30m
- SRTM GL1 Ellipsoidal 30m
- ALOS World 3D 30m
- ALOS World 3D Ellipsoidal, 30m
- Global Bathymetry SRTM15+ V2.1 500m
- NASADEM Global DEM
- Copernicus Global DSM 30m
- Copernicus Global DSM 90m
- EU DTM 30m
- GEDI_L3 DTM 1000m
- Global Ice Bathymetry 500m
- Global Sub-Ice Bathymetry 500m
References
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Grid | grid, input | GRID | - | - |
| Shapes | shapes, input | SHAPES | - | - |
| Output | Grid | data object Grid, output, optional | RESULT | - | - |
| Options | DEM Type | choice | DEMTYPE | - | Available Choices:
[0] SRTM GL3 90m
[1] SRTM GL1 30m
[2] SRTM GL1 Ellipsoidal 30m
[3] ALOS World 3D 30m
[4] ALOS World 3D Ellipsoidal, 30m
[5] Global Bathymetry SRTM15+ V2.1 500m
[6] NASADEM Global DEM
[7] Copernicus Global DSM 30m
[8] Copernicus Global DSM 90m
[9] EU DTM 30m
[10] GEDI_L3 DTM 1000m
[11] Global Ice Bathymetry 500m
[12] Global Sub-Ice Bathymetry 500m
Default: 3 |
| API Key | text | API_KEY | - | - |
| Extent | choice | EXTENT | - | Available Choices:
[0] user defined
[1] shapes extent
[2] grid system extent
[3] grid system
Default: 0 |
| Grid System | grid system | GRID_SYSTEM | - | - |
| West | floating point number | XMIN | - | Default: 538350.000000 |
| East | floating point number | XMAX | - | Default: 598020.000000 |
| South | floating point number | YMIN | - | Default: 5906910.000000 |
| North | floating point number | YMAX | - | Default: 5965170.000000 |
| Columns | integer number | NX | - | Minimum: 1
Default: 1990 |
| Rows | integer number | NY | - | Minimum: 1
Default: 1943 |
| Buffer | floating point number | BUFFER | add buffer (map units) to extent | Minimum: 0.000000
Default: 0.000000 |
| Take Cellsize | choice | CELLSIZEDEF | - | Available Choices:
[0] data type resolution
[1] user defined
Default: 0 |
| Cellsize | floating point number | CELLSIZE | - | Minimum: 0.000100
Default: 90.000000 |
| Coordinate System Definition | text | CRS_STRING | Supported formats comprise PROJ and WKT strings, object codes (e.g. "EPSG:4326"). | - |
Command Line
Usage: saga_cmd io_webservices 4 [-RESULT ] [-DEMTYPE ] [-API_KEY ] [-EXTENT ] [-GRID ] [-SHAPES ] [-XMIN ] [-XMAX ] [-YMIN ] [-YMAX ] [-NX ] [-NY ] [-BUFFER ] [-CELLSIZEDEF ] [-CELLSIZE ] [-CRS_STRING ]
-RESULT: Grid
data object Grid, output, optional
-DEMTYPE:
DEM Type
choice
Available Choices:
[0] SRTM GL3 90m
[1] SRTM GL1 30m
[2] SRTM GL1 Ellipsoidal 30m
[3] ALOS World 3D 30m
[4] ALOS World 3D Ellipsoidal, 30m
[5] Global Bathymetry SRTM15+ V2.1 500m
[6] NASADEM Global DEM
[7] Copernicus Global DSM 30m
[8] Copernicus Global DSM 90m
[9] EU DTM 30m
[10] GEDI_L3 DTM 1000m
[11] Global Ice Bathymetry 500m
[12] Global Sub-Ice Bathymetry 500m
Default: 3
-API_KEY: API Key
text
-EXTENT:
Extent
choice
Available Choices:
[0] user defined
[1] shapes extent
[2] grid system extent
[3] grid system
Default: 0
-GRID: Grid
grid, input
-SHAPES: Shapes
shapes, input
-XMIN: West
floating point number
Default: 538350.000000
-XMAX: East
floating point number
Default: 598020.000000
-YMIN: South
floating point number
Default: 5906910.000000
-YMAX: North
floating point number
Default: 5965170.000000
-NX: Columns
integer number
Minimum: 1
Default: 1990
-NY: Rows
integer number
Minimum: 1
Default: 1943
-BUFFER: Buffer
floating point number
Minimum: 0.000000
Default: 0.000000
-CELLSIZEDEF: Take Cellsize
choice
Available Choices:
[0] data type resolution
[1] user defined
Default: 0
-CELLSIZE: Cellsize
floating point number
Minimum: 0.000100
Default: 90.000000
-CRS_STRING: Coordinate System Definition
text