GeoJSON Developer

GeoJSON is the universal exchange format for geodata between backend and frontend. It is human-readable, easy to process, and supported by MapLibre, Leaflet, PostGIS, and QGIS alike. I use GeoJSON for APIs, data exports, and embedding static data directly into map applications — with attention to clean validation and performance on larger datasets.

GeoJSON — Standard for Geo Data on the Web

GeoJSON is the universal exchange format for geographic data between backend and frontend. JSON-based, human-readable, and supported by practically all map libraries and GIS tools (MapLibre, Leaflet, PostGIS, QGIS) — the standard whenever spatial data is transferred or embedded.

When GeoJSON Makes Sense — and When It Doesn't

For static data layers (up to a few thousand features), API responses, and data exports, GeoJSON is the pragmatic choice. For larger datasets, pure GeoJSON responses hit performance limits — then I switch to vector tiles (PMTiles, MVT) or server-side filtering with PostGIS.

GeoJSON Services

Design of spatial APIs with clean GeoJSON output, validation of incoming data, conversion between GeoJSON and other formats (Shapefile, GeoPackage, KML), integration into MapLibre and Leaflet, and performance optimization for large feature sets.