A common GIS operation. Used to determine whether a point lies within a polygon's bounds.
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ray casting on earth's surface
Is it safe to use ray casting algorithm to check if a coordinate is inside a polygon specified as coordinates? Purpose of my question is because the longitudes are not parallel in a Cartesian sense, ...
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How can I improve my Ray casting algorithm?
I have been using the following function below which have been working well to decide if a point in the polygon but once I have many points which is building the polygon say over few thousand it seems ...
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Matching points in table to polygons
this is my first post to this forum. I hope to start participating actively.
I have a table with several records (aprox 200.000), each with its own coordinates. And I need to identify the "Polygon" ...
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How to update polygon field with point count for multiple rows? (Temporal point-in-polygon)
I have a shapefile with several regions. It contains basic info like ID, Code, Name1, Name2, etc.
It is overlaid with a shapefile of points (nearly 200k). Each point represents an event with a type ...
