I have a point layer with several points "belonging" to different years by attribute. For all points of each year I created a heatmap. Now I would like to define the core area of each heatmap.
Unfortunately, the values of the different heatmaps are pretty different, therefore its not possible to choose one value for all. But because there are over 100 different years, so over 100 different heatmaps, I do not really want to set the value for each core area manually.
I thought of reclassify the heatmaps from value to percentage (min value = 0%; max value = 100% or min=0 max=100) to generate the core area based on one percent-value for all heatmaps with batch-processing or graphical modeller.
I tried different recalculating/reclassifing-tools like the raster calculator, r.reclass (grass), reclassify values (saga) and reclassify by table (qgis) but I'm not able to get it to work. But honestly I think I'm just too stupid to find out the respective expression for this problem.
Can anybody help me with the correct expression or way to reclassify the rasters/heatmaps from min-value=0(%) to max-value=100(%)?
I prefer working with the new QGIS Version 3.6 but if a solution requires another version of QGIS it would not be a problem.