pythonpython-3.xplotlyshapely
How to calculate the shape from lon/lat coordinates and draw it with plotly
I have a plotly based map where I am showing several coordinates in a Mapbox scatter plot. Now I want to get a shape from these coordinates and draw a shape on the map.
The coordinates are available as a pandas.Series. Below an extract of the coordinates.
0 [[51.795, 3.363], [51.79483333333334, 3.363], ...
1 [[51.42536, 2.622246666666667], [51.4256883333 ...
How can I get a shape for these coordinates which boundaries are the outmost coordinates of the cluster?
Solution
In geometry, there are basically two main concepts Convex hull and Alpha shape (also called Concave hull) to get the shape of a finite set of points. The following picture should visually describe the differences between them [2].
In case you want to have the convex hull you can use scipy.spatial.ConvexHull [4].
As alternatives to scipy you can also check geopandas and alphashape.
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