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I use QGIS 2.18.16.
I import 1.000.000 data points, from a text document, as a CSV layer. Then I add a raster of 5 by 5m over those points.
Project, layer and raster are put in the same CRS (Belgian Lambert 72) After that I count points in polygon.
This works fine.
How do I count point in polygon for up to 5 million data points or more? When I import more then 1 million I can't count points in polygon no more.
Do the count five times, and after each count copy the result to a new column in your polygon layer. After the last count, sum up all the columns using the field calc. If you are really lazy like me, build a graphical modell which runs all your steps automatically.
Also, I don't know, whether and/or where to upper boundary for rows in an attribute table is.
