Add raster_to_points #313

CHANGELOG.md

@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased / Draft
 
+### Added
+
+- New processes in proposal state:
+    - `raster_to_points`
+
 ## [1.2.0] - 2021-12-13
 
 ### Added

proposals/raster_to_points.json

@@ -0,0 +1,81 @@
+{
+    "id": "raster_to_points",
+    "summary": "Sample random points from rasters",
+    "description": "The given raster data cubes is converted into a set of point samples per geometry given. The samples are always taken at the pixel center.",
+    "categories": [
+        "cubes",
+        "vector"
+    ],
+    "experimental": true,
+    "parameters": [
+        {
+            "name": "data",
+            "description": "The raster data cube to extract a sample from.",
+            "schema": {
+                "type": "object",
+                "subtype": "raster-cube"
+            }
+        },
+        {
+            "name": "geometries",
+            "description": "Geometries to extract samples for. If not given or `null`, the bounding box of the raster data cube is used as the Polygon to sample for.\n\nTo maximize interoperability, a nested `GeometryCollection` should be avoided. Furthermore, a `GeometryCollection` composed of a single type of geometries should be avoided in favour of the corresponding multi-part type (e.g. `MultiPolygon`).",
+            "optional": true,
+            "default": null,
+            "schema": [
+                {
+                    "type": "null"
+                },
+                {
+                    "type": "object",
+                    "subtype": "geojson"
+                },
+                {
+                    "type": "object",
+                    "subtype": "vector-cube"
+                }
+            ]
+        },
+        {
+            "name": "num_samples",
+            "description": "The number of samples.\n\nThe number of samples can be given in three different ways:\n\n* An integer >= 1: The absolute number of samples to take.\n* A number > 0 and < 1: The fraction of samples to take, e.g. 0.5 to take a sample for 50% of the data. To take a sample for 100% of the data (i.e. each pixel) see the next point.\n* If not given or `null`, it takes a sample for each pixel.",
+            "optional": true,
+            "default": null,
+            "schema": [
+                {
+                    "title": "Absolute",
+                    "type": "integer",
+                    "minimum": 1
+                },
+                {
+                    "title": "Fraction",
+                    "type": "number",
+                    "minimumExclusive": 0,
+                    "maximumExclusive": 1
+                },
+                {
+                    "title": "All",
+                    "type": "null"
+                }
+            ]
+        },
+        {
+            "name": "seed",
+            "description": "A randomization seed to use for random sampling. If not given or `null`, no seed is used and results may differ on subsequent use.",
+            "optional": true,
+            "default": null,
+            "schema": {
+                "type": [
+                    "integer",
+                    "null"
+                ]
+            }
+        }
+    ],
+    "returns": {
+        "description": "Returns a vector data cube with the sampled points as `MultiPoint` per geometry given.",
+        "schema": {
+            "type": "object",
+            "subtype": "vector-cube"
+        }
+    }
+}