I have downloaded data from the USGS to create a Map for a malaria risk in east africa but my question is only about the actuall Input in the Raster Calculator. I have a RFE Tiff that shows the Rainfall in the Area, the highest rainfall is within the value of 76 to 150 so I used the following expression in the Raster Calculator to get an Output with only these values: "ea06063_ea3606mod@1" >= 76 AND "ea06063_ea3606mod@1" <= 150. Unfortunately all I got as an Output was a black screen... Anybody knows what could be the mistake??
Assuming that these values between 76 and 150 exist at the map, the correct expression to do that is:
("ea06063_ea3606mod@1" >= 76 AND "ea06063_ea3606mod@1" <= 150)*("ea06063_ea3606mod@1")
Afterward, when you have the raster loaded in QGIS, in the layer properties unmark "no data value" and set 0 as your "Additional no data value".