When âone size fits allâ fails: PostGIS bounding boxes for maps
Blog post from Felt
Felt, a mapping company, focuses on delivering an intuitive data interaction experience by making complex data layers easily accessible through features like fast tile delivery and interactive geometric attributes. The challenge lies in the subjective nature of creating effective maps and the difficulty of implementing universal solutions. To address this, Felt engineers embrace heuristics when determining the extent of data layers, using PostGIS to calculate bounding boxes for large datasets. They leverage PostGIS functions like ST_Extent and ST_EstimatedExtent to optimize performance, with ST_EstimatedExtent providing a significantly faster, though slightly less precise, estimation of spatial data extents. This approach allows Felt to effectively manage large data layers while maintaining efficient frontend performance.
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