3D Modelling of mining surface using ThreeJS

We are trying to simulate the performance of drilling and blasting operations in mine sites based on blast design inputs. And for the purpose we need an ThreeJS developer to assist us with designing the visual interfaces in 3D view in our C# code. The following requirements should best describe our project needs - - Create 4 3D Surfaces with terrain view. We will be providing the 2D view of the surfaces. - Draw 3D shapes in the 3D surface. - Ability to move, add, remove shapes. - Ability to extract a particular area from Google Map and create a 3D view of the same. - Integration with .net /angular.js compatible platform. - Ability to create 3D surface based on image. Please Note: This is not just a designing job. The job requires a developer with knowledge of Javascript or C# programming language. The design needs to be developed programmatically using either ThreeJS or AutoCAD or Unity API's that integrate with C# code.