OPERA_L3_DIST-ANN-HLS_Color_Index draws VEG-DIST-STATUS 9 and 10, but its colormap omits them

[dschuck]

The GIBS colormap for the OPERA_L3_DIST-ANN-HLS_Color_Index layer (https://gibs.earthdata.nasa.gov/colormaps/v1.3/OPERA_Vegetation_Disturbance_Annual.xml) lists VEG-DIST-STATUS values 0, 3, 6, 7, 8, and 255.

Table 4-2 of the OPERA DIST HLS Product Specification V1 (https://lpdaac.usgs.gov/documents/1766/OPERA_DIST_HLS_Product_Specification_V1.pdf) also defines values 9 ("confirmed previous year <50%") and 10 ("confirmed previous year >=50%") for DIST-ANN, and the layer's tiles draw them. The tiles are palette PNGs whose index is the class value, and their embedded palette maps index 9 to #333333 and index 10 to #444444, for example in https://gibs.earthdata.nasa.gov/wmts/epsg3857/best/OPERA_L3_DIST-ANN-HLS_Color_Index/default/2025-01-01/GoogleMapsCompatible_Level12/12/1581/655.png. Comparing tiles with the source data over a San Francisco Bay Area region confirms that pixels of value 9 and 10 are drawn in those colors.

Neither color appears in the colormap or legend, so a client building its legend from the colormap cannot identify those pixels, and they are hard to distinguish from value 0 (#121212).

Could values 9 and 10 be added to the colormap and legend, with the colors the tiles already use?

[LP DAAC - dgolon]

Hello @dschuck Thanks for posting. We are looking into this. We will follow up when we have an answer. -- Danielle

[dschuck]

Hello @dschuck Thanks for posting. We are looking into this. We will follow up when we have an answer. -- Danielle

Hi Danielle. Just checking in to see if you've uncovered anything regarding the missing values.

[LP DAAC - dgolon]

@dschuck Apologies for the delay. We are still waiting for a response, the contact was on vacation, but we should have it here shortly in the next day or two. We'll post as soon as we know more. Thanks -- Danielle

[LP DAAC-EDL - lien]

Hello,
We found out the decision to leave those color layers out in GIBS was made at very early in the process. We have made the request to place them in, however that can only be done with the next Version of OPERA. Thanks for your patience.
LPDAAC