Georelation between 2 sets og geojson

Question

I have 2 sets of geojson polygons: one for lands and one for buildings. All buildings are built on lands so all building polygons belong to a land polygon but I don’t have the relationship between the 2 sets and I need to build it on the fly in javascript / leaflet.

My 2 sets can be as large as 10000 polygons per set so I need a good algorythm to minimize the computation time. Do you have an idea on how I could do it? For example is there a way to know all leaflet layers at a specific latlng location? This could be a way to build the relation. Thanks for your help!

Sam

Thanks Ivan. I had identified that library. But using this solution means 10000 * 10000 intersections to be checked. I fear it could be slow — Samuel, Jan 15 '23 at 20:36

score 0 · Answer 1 · answered Jan 30 '23 at 23:17

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I finally found a very fast library that helps! It is called geojson-geometries-lookup.

answered Jan 30 '23 at 23:17

Samuel

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Georelation between 2 sets og geojson

1 Answers1