EPSG:4326 projection method, how to set the viewport

[shaojun427]

I have modified the projection method of mapbox-gl, the slice rendering is normal, but the viewport of the deck is Mercator projection by default. If I want to support other EPSG, do I need to configure it based on the basic viewport?

[Pessimistress]

You can use the OrthographicView.

[kylebarron]

The TileLayer currently only supports Web Mercator tiles in the OSM indexing system. There's some discussion here about making it easier for users to extend the TileLayer to more tiling systems #5504

[Pessimistress]

The TileLayer currently only supports Web Mercator tiles in the OSM indexing system

The TileLayer supports non-geospatial views also, as shown in https://deck.gl/examples/tile-layer-non-geospatial/

You just need to manually set the extent prop to the geo bounding box ([-180, -90, 180, 90]).

[ibgreen]

@math.gl/proj4 module supports reprojection from WKT-CRS coordinate systems to e.g web mercator. Perhaps it is possible to add a coordinate post processing step in the onTileLoad function?

[Pessimistress]

@ibgreen I believe the original ask was to plot the coordinates as is and not use Web Mercator projection, which works out of the box with OrthographicView: https://gist.github.com/tech-meppem/5a40e00b04220e924177791b4982be0f

[kylebarron]

My (possibly incorrect) interpretation, especially of @Emelia-L 's comment, is that the user has geospatial data that they want to use with a geospatial view and possibly a basemap, but the data are tiled in the lon/lat tiling system, which doesn't work with the existing TileLayer.

Perhaps it is possible to add a coordinate post processing step in the onTileLoad function?

If source data is tiled according to a tiling system other than the OSM indexing system, then this is not possible, because for any x-y-z index, the OSM system puts it at a different location on the globe than another tiling system. That's the point of the discussion in the linked PR #5504