Using OSM tile layer instead of Google

[Johnson Chetty]

Hello, 

I wanted to know how easy it would be to use OSM tiles instead of Google tiles. 
We have an OSM tile server on the same machine and I also saw that there is a TILE_HOST option in the settings file. 

So I thought we could use that? Is there something already being done for this purpose?

Could anyone let me know what would be the scope of changes needed to be done. Are there any hidden issues that can come up while attempting this?

[Andrew Thompson]

Hi Johnson,

It should be pretty easy to swap out the default Google tiles for OSM tiles and.

The type of basemap used is set in each "Instance" Django model. Provided you have an {x}/{y}/{z} TMS URL for an OSM tile server, you can change the basemap_type and basemap_data values of the Instance you want to switch to OSM tiles, either through the PSQL prompt directly or the Django admin shell

See the definition here:

https://github.com/OpenTreeMap/OTM2/blob/master/opentreemap/treemap/instance.py#L147-L159

Set basemap_type = 'tms'

and set basemap_data = 'http://yourTMS-server-URL/{x}/{y}/{z}.png'

Let us know if you have more questions.

Thanks,

Andrew

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[Justin Walgran]

In testing, we discovered an issue with selecting trees when switching to a TMS base map. https://github.com/OpenTreeMap/OTM2/issues/1887 This will need to be fixed before a TMS base map is usable.