ppgrid
mrzk.io- Category
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- No. 2624Tools index
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- Open Source
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- TOOL
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About
ppgrid is an open-source GIS library that rasterizes large point datasets using a modified Inverse Distance Weighting algorithm, precalculating which points intersect which grid cells to avoid the multiplicative O(N×M) cost of traditional IDW implementations like those in gdal_grid or GRASS. Its author reports processing 16 million points on a modest laptop, roughly 17 times faster than standard IDW tools, though it has not yet been validated for statistical correctness beyond visualization use.
Why it made the leaderboard
It replaces slow O(N*M) inverse-distance-weighting raster interpolation with a precomputed approach that handles tens of millions of points where existing GIS tools like gdal_grid choke.
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