[DONE] should we rescale the non byte data automatically?

[vincentsarago]

Right now when a user wants to create png/jpeg/webp image (part/tile/preview) from a non byte data, GDAL will throw an error complaining about data type note being supported by the image driver and thus the server returns 500

I'm 50/50 convinced we should at least return a black image by rescaling the data from the min/max value of the datatype( https://github.com/mapbox/rasterio/blob/b17b2e330e2ba5d15043ff2045dcfec912c38ed2/rasterio/dtypes.py#L63-L71)

How to

add 👇

# If Data is not in Byte we rescale to default datatype min/max
rescale_bounds = None
img_dtype = data.data.dtype
if (
    render_params.rescale_range is None
    and img_dtype not in [numpy.uint8, numpy.int8]
    and format not in [ImageType.tif, ImageType.npy, ImageType.jp2]
):
    rescale_bounds = list(dtype_ranges[str(img_dtype)])

here https://github.com/developmentseed/titiler/blob/master/titiler/core/titiler/core/factory.py#L339

cc @geospatial-jeff @kylebarron

[vincentsarago]

FYI, I'm going to move forward with this!

[vincentsarago]

This was done in rio-tiler directly