bg_buffer_point - ObjectVision/GeoDMS GitHub Wiki
Geometric functions bg_buffer_point
- bg_buffer_point(point_data_item, size, nr_angles)
bg_buffer_point(point_data_item, size, nr_angles) results in a polygon data item with buffer circles around each point in the point_data_item. The resulting data item has the same domain unit as the point_data_item.
The size argument indicates the buffer circle size.
The nr_angles argument indicates how many angles are used to make the buffer circles. More angles results in smoother circles but also in more data.
The bg_ prefix of the function name indicates that the implementation of operator uses boost geometry library, more specifically, the buffer function.
- data item point_data_item with a point value type
- data item size with a float64 value type (until version 14.11.2 argument size could only be a parameter)
- data item nr_angles with a uint8 value type (until version 14.11.2 argument nr_angles could only be a parameter)
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attribute<fpoint> point_buffer_circles (poly, pointset) := bg_buffer_point(pointset/geometry, 10.0, 16b);
more examples of buffer functions can be found here: Buffer processing example