expand README, links to used projects

1 files changed, 16 insertions, 3 deletions

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-Data source: https://download.geofabrik.de/europe/denmark.html
-Data extractor: https://osm2pgsql.org/examples/poi-db/
-Postgresql int data types extension https://github.com/petere/pguint
+# POI map
+
+## Features:
+
+- [Voronoi polygons](https://en.wikipedia.org/wiki/Voronoi_diagram): Showing which *Point Of Interest* is nearest a given area as the crow flies
+- Heatmap
+
+## Links
+- [Live version - map.node5.net](https://map.node5.net/)
+- Data source (OpenStreetMap data): https://download.geofabrik.de/europe/denmark.html
+- Data extractor: https://osm2pgsql.org/examples/poi-db/
+- [leafletjs.com](https://leafletjs.com/)
+- [Leaflet.heat - github.com](https://github.com/Leaflet/Leaflet.heat)
+- [postgresql.org](https://www.postgresql.org/)
+  - [postgis.net/](https://postgis.net/)
+    - [ST_VoronoiPolygons - postgis.net](https://postgis.net/docs/ST_VoronoiPolygons.html)