jsts

If you're looking to embed maps in a web page I've had good experiences with using both Mapbox and Google Maps' js libraries directly from cljs. On the geospatial side JSTS (https://github.com/bjornharrtell/jsts) has been super helpful. Like you, I was looking for a cljs wrapper for these things, but ended up not needing them in the end. The js interop ended up being pretty straightforward. Happy to chat further, email in bio.

You should be able to this JSTS I think. Create a line with the gps track, create a buffer with the specified distance, feed the resulting polygon to your mapping library. https://github.com/bjornharrtell/jsts/blob/master/README.md Sample use: http://bjornharrtell.github.io/jsts/

I like his notion that IEEE errors result from sloppiness. So here are 2 "non-sloppy" version of the computation of the sign of a determinant: https://github.com/bjornharrtell/jsts/blob/master/src/jsts/a... http://www.cs.cmu.edu/afs/cs/project/quake/public/code/predi... Remember, the determinant value is not the rounded value of the exact computation with those things unless it is is zero, it's still "sloppy" if it's far from zero. You get only 1 bit of guaranteed accuracy in a 64bits FP number if the result is not zero. I think there is a little bit to "sloppiness" in the fact that we carry very inexact results in FP. Even "good enough" FP computation is PhD level.