Heightmap Tool

So, I was working on my very iNtErAcTiVe walking game where you have to walk and explore the world but then i found a tempting need of a Map. So, i took a hybrid approach of generating a world by Heightmap and then manually adjusting it according to needs. But then i could not find a heightmap........ and so i built one for myself. 

Gets the Job Done (btw)