Parameter for min zoom rendering

[gagecarto]

I am generating some COGs which I then display using Titiler. Rio command is below
rio cogeo create \ --co TILED=TRUE \ --co BLOCKXSIZE=128 \ --co BLOCKYSIZE=128 \ --co COMPRESS=DEFLATE \ --overview-resampling=bilinear \ inputFile.tif outputFile.tif

Tiles from Titiler look like below at a zoom of ~4.

A zoom of 6 looks more like this. Does this seem like an issue with my Titiler requests or more likely from how I generated my COGs?

And just for good measure.. Below is an example of a Titiler request
titilercog/tiles/WebMercatorQuad/8/46/98@1x?url=https://example.com/outputFile.tof&bidx=10&nodata=99999&colormap=%7B"1"%3A"%23F46D43"%2C"2"%3A"%23032769"%2C"99999"%3A"%23b44545"%7D

[vincentsarago]

@gagecarto in your request it seems that you are passing a nodata=99999 option which tells me your original data might not have internal nodata set. When creating overviews (using bilinear resampling) you'll create fake values in those.

While the nodata option is present in rio-tiler/titiler it should be avoided if you can set the nodata value directly in your COG.

rio cogeo create --nodata 99999  --co TILED=TRUE --co BLOCKXSIZE=128 --co BLOCKYSIZE=128 --co COMPRESS=DEFLATE --overview-resampling=bilinear inputFile.tif outputFile.tif