How to set the geometry parameter of ST_TileEnvelope when 2 tiles exist at zoom level zero

[jingsam]

I want to tile a dataset with a custom tiling scheme which is:

1. crs is EPSG:4326
2. 2 tiles exist at zoom 0, which is 0/0/0 and 0/1/0

I tried this: SELECT st_astext(st_tileenvelope(0, 1, 0, st_makeenvelope(-180, -90, 0, 90, 4326)))

ERROR: ST_TileEnvelope: Invalid tile x value, 1

[Algunenano]

By definition, 2 tiles can't exist at zoom 0. If you are using a custom tiling scheme you'll need to create a custom function that deals with whatever rules you want to define.

[komzpa]

I had to do that in the past for Landsat imagery. I did it via defining an larger extent and only using zooms from 1, which contained 4 tiles of which only upper 2 were explored.

That required a base box of (-180.0, -166.0, 332.0, 346.0), but afterwards the grids were aligned:

​https://github.com/Komzpa/twms/blob/master/twms/projections.py#L31