Using heatmap as PCG points input

I’m trying to figure out how to use a heatmap to define static mesh locations. spawn points. The idea is to have a greyscale heatmap image representing the entire layer dimensions, then use the pixel whiteness to define probablity of spawning the static meshes defined by a PCG Graph object. I have a 3rd party terrain generation program that produces nice heatmaps I want to use as procedural spawner inputs. Any have ideas of how to proceed?