I'm working on an orthomosaic and there is a particular weed species that is flowering at the moment and I need to isolate it and map it out. It's a yellowish green and is obvious in the ortho. I know there must be a way to isolate it so I can map it better.
I've tried the raster calculator with the following expression:
Narlu Orthomosaic 26-06-21@1"=190-210 AND "Narlu Orthomosaic 26-06-21@2"=210-225 AND "Narlu Orthomosaic 26-06-21@3"=78-86
I've made this a range of colors to try and best capture the range that this flower reflects.
The information shown when I use the "information" pointer is the following:
- Band 1 = 210
- Band 2 = 218
- Band 3 = 83
What am I doing wrong as the other answers on this site don't seem to cover this type of question well.
I'll eventually make a vector shapefile layer out of it.
Any help would be great!