the problem of the colormap?

[kl402401]

i don't know how to use the colormap, is anyone here to tell me how to use it in titiler mosaicjson api?thanks

[zacharyDez]

Hi @kl402401! Did you look at <your_deployment>/API.html? It provides docs to the endpoints. If running locally with docker-compose, you should be able to get more details and perhaps explain what went wrong and what you are trying to do specifically.

The mosaicjson seems to accept a json encoded colormap from the docs:

[vincentsarago]

you can also have a look at https://developmentseed.org/titiler/advanced/rendering/

[kl402401]

hi@vincentsarago ,@zacharyDez, thanks for the response.

I make a colormap.json file like this,
{
"85": [155, 155, 155, 255],
"179": [209, 209, 209, 255],
"67": [65, 0, 0, 255],
"53": [0, 61, 0, 255],
"104": [0, 109, 0, 255],
"152": [0, 152, 0, 255],
"70": [0, 0, 91, 255],
"183": [0, 0, 214, 255]
}
but it don't work, and it prompt like this ---> "detail": "Could not parse the colormap value."

Request URL:
http://127.0.0.1:8000/mosaicjson/tiles/WorldMercatorWGS84Quad/9/413/[email protected]?url=file%3AD%3A%5Ctitiler_proj%5Ctitiler-main%5Cmosaic.json&bidx=1&bidx=2&bidx=3&expression=b1%2Fb2&pixel_selection=mean&rescale=0%2C3000&colormap=file%3AD%3A%5Ctitiler_proj%5Ctitiler-main%5Ccolormap.json

[vincentsarago]

you can't pass the colormap using a file, you need to encode the JSON

as shown in https://developmentseed.org/titiler/advanced/rendering/#custom-colormaps

[kl402401]

thanks @vincentsarago for response,Is that only support the tiff of one band? If i want to change some color for the tiff with 3 bands just like the photoshop do, how can i support to do that?