Minimal setup for Copernicus DEM dataset ?

[tdurand]

Hello,

I am trying to setup a tile server for the copernicus DEM dataset, here is the setup:

from fastapi import FastAPI
from titiler.core.factory import TilerFactory
from rio_tiler_pds.copernicus.aws.dem import Dem30Reader

app = FastAPI(title="Copernicus DEM Tile Server")

# Use TilerFactory with the Dem30Reader
copernicus_tiler = TilerFactory(reader=Dem30Reader)

# Register the tile endpoint at /copernicus
app.include_router(copernicus_tiler.router, prefix="/copernicus", tags=["Copernicus DEM"])

The server starts well on port 8000

But when I try to read any tile or statistic, for example:

http://localhost:8000/copernicus/tiles/9/256/180.png?rescale=0,9000&colormap=terrain
http://localhost:8000/copernicus/info
http://localhost:8000/copernicus/statistics

I get Not found or {"detail":[{"type":"missing","loc":["query","url"],"msg":"Field required","input":null}]}

What am I doing wrong ?

Sorry for the newbie question

Thanks a lot

Thibault

[vincentsarago]

There are few gotcha this this reader because it behaves like a mosaic reader

from attrs import define

from fastapi import FastAPI
from titiler.core.factory import TilerFactory
from rio_tiler_pds.copernicus.aws.dem import Dem30Reader

app = FastAPI(title="Copernicus DEM Tile Server")


# NOTE: we need to overwrite the `path_dependency` for titiler (which will inject `url` queryparameter).
# The `Dem30Reader` doesn't take any input so we return nothing 
def fake_path_dependency() -> None:
    return


# We don't want to have `/statistics` endpoints (because it's unsupported by the reader) 
@define(kw_only=True)
class CustomTilerFactory(TilerFactory):
    def statistics(self):
        """We cannot return statistics for the `Dem30Reader`."""
        return 
        

# Use TilerFactory with the Dem30Reader
copernicus_tiler = CustomTilerFactory(
    reader=Dem30Reader, 
    path_dependency=fake_path_dependency, 
    add_preview=False, 
    add_part=False, 
    router_prefix="/copernicus",
)


# Register the tile endpoint at /copernicus
app.include_router(copernicus_tiler.router, prefix="/copernicus", tags=["Copernicus DEM"])

http://127.0.0.1:8000/copernicus/WebMercatorQuad/map.html?rescale=0,1000&colormap_name=terrain

[tdurand]

Works ! So cool !!!! simplify greatly my old setup having a mosaic.json file !

PS: This one ChatGPT couldn't solve it, and I tried a lot of things 🙃

[vincentsarago]

developmentseed/titiler#701 (comment)