Drag and drop shapefiles turn into vector tiles in the browser

[meh9]

No description provided.

[meh9]

@philipgrimmett @stevage

[stevage]

Is this the same as #2907? Why "turn into vector tiles" exactly? Tell me more? :)

[meh9]

@stevage oh right, yes, very related. One of the problems we have is that e.g large GeoJSON files (and I theorise the same is true for detailed Shapefiles) will "hang" the browser because it takes too long to draw, "my" idea (already prototyped by @steve9164 I think) was to turn it into VT's for speed of display.

[stevage]

Ah. Yeah, that's what Mapbox-GL-JS does, with https://github.com/mapbox/geojson-vt

IMHO those two things should be separated though. Even without the vector tile thing, files of say 20MB are probably totally fine.

[tephenavies]

Above a couple of megabytes you need level of detail simplification to draw vector data in a browser without lag while panning in Cesium

[nf-s]

🥳

[nf-s]

This is available now for new ProtomapsImageryProvider geojson items. To use this you will need to set Terria.configParameters.enableGeojsonVt = true