I'm currently locating a site for a new air quality monitor and have a set of raster 1X1km cell raster data which I made from a .csv file. This raster holds the mean amount of NO2 in each cell as a value.
I'm looking to put this monitor in an urban park to monitor urban background pollution and have these parks as polygons, and I also want to put them in areas where concentrations of NO2 are fairly high to keep an eye on them.
My dilemma is that I can't select the polygons which are within the high NO2 raster cells, and because I made the raster myself from point data, I can't convert it into square polygons with the value to select by location.
(It's all a bit complicated but I've tried to be as clear as I can!)
Does anyone know how I can select the polygons which have a high or low NO2 value from the raster? I've included an image to try and make it a bit clearer!
Thanks in advance,