SAGA.ta_channels.7: Valley Depth
Valley depth is calculated as difference between the elevation and an interpolated ridge level. Ridge level interpolation uses the algorithm implemented in the 'Vertical Distance to Channel Network' tool. It performs the following steps:<br/> - Definition of ridge cells (using Strahler order on the inverted DEM).<br/> - Interpolation of the ridge level.<br/> - Subtraction of the original elevations from the ridge level.<br/>
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{"id": "SAGA.ta_channels.7", "title": "Valley Depth", "description": "Valley depth is calculated as difference between the elevation and an interpolated ridge level. Ridge level interpolation uses the algorithm implemented in the 'Vertical Distance to Channel Network' tool. It performs the following steps:<br/> - Definition of ridge cells (using Strahler order on the inverted DEM).<br/> - Interpolation of the ridge level.<br/> - Subtraction of the original elevations from the ridge level.<br/>", "version": "1.0.0", "jobControlOptions": ["sync-execute", "async-execute", "dismiss"], "outputTransmission": ["value", "reference"], "links": [{"rel": "http://www.opengis.net/def/rel/ogc/1.0/execute", "type": "application/json", "title": "Execute End Point", "href": "http://tb17.geolabs.fr:8111/ogc-api/processes/SAGA.ta_channels.7/execution"}, {"rel": "alternate", "type": "text/html", "title": "Execute End Point", "href": "http://tb17.geolabs.fr:8111/ogc-api/processes/SAGA.ta_channels.7/execution.html"}], "inputs": {"ELEVATION": {"title": "Elevation", "description": "Elevation", "extended-schema": {"oneOf": [{"allOf": [{"$ref": "http://zoo-project.org/dl/link.json"}, {"type": "object", "properties": {"type": {"enum": ["image/tiff", "application/x-ogc-envi", "application/x-ogc-aaigrid", "image/png"]}}}]}, {"type": "object", "required": ["value"], "properties": {"value": {"oneOf": [{"type": "string", "contentEncoding": "base64", "contentMediaType": "image/tiff"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "application/x-ogc-envi"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "application/x-ogc-aaigrid"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "image/png"}]}}}]}, "schema": {"oneOf": [{"type": "string", "contentEncoding": "base64", "contentMediaType": "image/tiff"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "application/x-ogc-envi"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "application/x-ogc-aaigrid"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "image/png"}]}, "id": "ELEVATION"}, "THRESHOLD": {"title": "Tension Threshold", "description": "Maximum change in elevation units (e.g. meter), iteration is stopped once maximum change reaches this threshold.", "schema": {"type": "number", "default": 1, "format": "double", "nullable": true}, "id": "THRESHOLD"}, "MAXITER": {"title": "Maximum Iterations", "description": "Maximum number of iterations, ignored if set to zero", "schema": {"type": "integer", "default": 0, "nullable": true}, "id": "MAXITER"}, "NOUNDERGROUND": {"title": "Keep Ridge Level above Surface", "description": "Keep Ridge Level above Surface", "schema": {"type": "boolean", "default": false, "nullable": true}, "id": "NOUNDERGROUND"}, "ORDER": {"title": "Ridge Detection Threshold", "description": "Ridge Detection Threshold", "schema": {"type": "integer", "default": 4, "minimum": 1, "maximum": 7, "nullable": true}, "id": "ORDER"}}, "outputs": {"VALLEY_DEPTH": {"title": "Valley Depth", "description": "Valley Depth", "extended-schema": {"oneOf": [{"allOf": [{"$ref": "http://zoo-project.org/dl/link.json"}, {"type": "object", "properties": {"type": {"enum": 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Level", "extended-schema": {"oneOf": [{"allOf": [{"$ref": "http://zoo-project.org/dl/link.json"}, {"type": "object", "properties": {"type": {"enum": ["image/tiff", "application/x-ogc-envi", "application/x-ogc-aaigrid", "image/png"]}}}]}, {"type": "object", "required": ["value"], "properties": {"value": {"oneOf": [{"type": "string", "contentEncoding": "base64", "contentMediaType": "image/tiff"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "application/x-ogc-envi"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "application/x-ogc-aaigrid"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "image/png"}]}}}]}, "schema": {"oneOf": [{"type": "string", "contentEncoding": "base64", "contentMediaType": "image/tiff"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "application/x-ogc-envi"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "application/x-ogc-aaigrid"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "image/png"}]}, "id": "RIDGE_LEVEL"}}}
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http://tb17.geolabs.fr:8111/ogc-api/processes/SAGA.ta_channels.7.html Last modified: Sat Dec 4 00:09:36 CET 2021