One of the more common tasks I use QGIS for is creating flood inundation and water extent maps using a variety of remotely sensed data. My general method for visualizing the data was to create a discrete singlelayer pseudocolor ramp with two classes. For example, if using NDWI data I would set values of [-1, 0.1] as fully transparent and [0.1, 1] as opaque shade of blue. On Ubuntu 18.04, QGIS 3.2 I've noticed that if I only use two classes, the data isn't displayed. If I add a third class it will be displayed. Is this a problem and should I submit a bug report?
Thanks, Shawn
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