Show HN: Ppgrid – Rasterising points in minutes, not hourshttps://mrzk.io/posts/ppgrid-fast-continentscale-raster-interpolation
Hi all, I wanted to share a recent library I made for myself since I continually have to work with large-scale point data spanning millions of rows. I generally found existing IDW tools are insanely slow and unreliable with the datasets I commonly work with. ppgrid is an open source GIS tool and it is intended to create beautiful visualisations that don't take an absurd amount of time to process. It uses a modified Inverse Distance Weighting (IDW) approach: instead of having to traverse every single point for every single grid O(N*M), it precalculates which points intersect which grids. This…
