Terrain Setup for 8x8 km Landscape

I need an experienced developer to transfer an existing 8x8 km heightmap into a new project.

Requirements:
- Transfer 8x8 km heightmap
- Set up basic landscape layers: Grasslands, Mountains, Desert
- Create water layer as a river
- Apply medium detail for terrain textures

Ideal skills and experience:
- Proficiency in landscape and terrain design
- Experience with heightmap integration
- Knowledge of water layer implementation
- Attention to detail and texture application