FEAT: Scales and Measurements and Distances (oh my!)

[IndianBoy42]

Thanks for the library, its nice to have an easy to use and performant library for map visualization in rust.

Something I really want is the ability to measure and compute distances between different points (accounting for coordinate systems and projections and spherical geometry nonsense).

Applications:

• Showing the current scale of the map view
• Denoising paths of GPS data for plotting (points close enough together can be collapsed)
• Measure distance between selected points on the map