So, im curious what the and or best size for a height map would be? As current i think the 24,000x19,000 is just to big haha
It depends on your game ^^
I think the heightmap size is 8000x8000, but I’m not 100% sure. Depending on your game you can choose between different sizes. Make sure to use one of those:
4033x4033
2017x2017
1009x1009
509x509
505x505
255x255
253x253
127x127
64x64
Hm if its 8k then it would be 8129… Ok time to get busy breaking the height map up 
On a side note… god i would hate to be doing a 100sqkmx100sqkm map… so many little tiles