Coordinate projections

[OutrightHosting]

MapLibre doesn’t currently support alternative coordinate projections, it’s been on the Road map for a long time! It would be very helpful to support alternative projections for maps that aren’t available in EPSG:3857

Describe the solution you'd like
This looks like it could be a good interim solution -https://github.com/bwswedberg/maplibre-gl-raster-reprojection

Describe alternatives you've considered
Only options available are external to Traccar like proxies which cause slow loading etc

[tananaev]

What are the use cases you need it for?

[OutrightHosting]

Personally OSGB EPSG:27700

& I know there are others with similar requests

https://www.traccar.org/forums/topic/custom-map-coordinate-conversion/

[tananaev]

By use case I mean the reason you need it.

[OutrightHosting]

We run asset & personal tracking in remote outdoor areas of the UK. Ordnance Survey is the best mapping available but the outdoor maps are only available in EPSG:27700.

We used proj4 on the V4 version of traccar but can't on the modern version.

OS is implemented into traccar, but the map tiles available in EPSG:3857 doesn't offer the same level of detail.

[tananaev]

Could you give an example where there's no same level of details. And the tile sources you're using.

[OutrightHosting]

Examples below same zoom level, same location, hopefully you can see the difference in detail, paths, contours etc.

1 - OS Maps Leisure EPSG:27700 1:25,000

2 - OS Maps Standard EPSG:3857

Data would come from the os data hub - maps api

https://osdatahub.os.uk/docs/wmts/technicalSpecification

[tananaev]

Looks like Leisure is the only style that's not available in EPSG:3857:

https://docs.os.uk/os-apis/accessing-os-apis/os-maps-api/layers-and-styles

Sounds like a corner case of a corner case.

[OutrightHosting]

Correct, but a massive part of UK mapping, and would open up options for other map tiles only available in non EPSG:3857 such as Yandex.

The OS maps api was also already implemented into Traccar so there is a use case/demand for UK specific tiles.

#1296

#947

#939

#366