pyfor.clip
Functions
Section titled “Functions”square_clip
Section titled “square_clip”square_clip(points, bounds)Clips a square from a tuple describing the position of the square.
| Parameter | Type | Description |
|---|---|---|
points |
A structured numpy array of points, as held in CloudData.points. |
|
bounds |
A tuple of length 4, min y and max y coordinates of the square. |
Returns: A boolean mask, true is within the square, false is outside of the square.
ray_trace
Section titled “ray_trace”ray_trace(x, y, poly)Determines for some set of x and y coordinates, which of those coordinates is within poly. Ray trace is generally called as an internal function, see poly_clip
| Parameter | Type | Description |
|---|---|---|
x |
A 1D numpy array of x coordinates. | |
y |
A 1D numpy array of y coordinates. | |
poly |
The coordinates of a polygon as a numpy array (i.e. from geo_json[‘coordinates’] |
Returns: A 1D boolean numpy array, true values are those points that are within poly.
poly_clip
Section titled “poly_clip”poly_clip(points, poly)Returns the indices of points that are within a given polygon. This differs from ray_trace in that it enforces a small “pre-clip” optimization by first clipping to the polygon bounding box. This function is directly called by Cloud.clip.
| Parameter | Type | Description |
|---|---|---|
points |
A structured numpy array of points, as held in CloudData.points. |
|
poly |
A shapely Polygon, with coordinates in the same CRS as the point cloud. |
Returns: A 1D numpy array of indices corresponding to points within the given polygon.