geotransport

Stochastic Geomorphological Transport for Terrain Erosion Simulation

Official Source Code Repository

A simulated terrain generated with this method.

Project Page

Nicholas McDonald Guillaume Cordonnier

Reading the Source Code

This repository contains a minimal reference implementation of our core algorithm - the generalized stochastic integration procedure - and includes example code for reproducing our error convergence plot and computing stochastic linear transport across a digital elevation model.

Note that this repository doesn't contain the full source code to perform the erosion simulation, but a version can be found in soillib. The reason for this separation is that this repository can remain archived with this reference implementation, while soillib can change continuously to adapt to needs.

This also helps keep the reference implementation simple and with minimal assumptions.

Using this Repository

The primary algorithm is implemented as a CUDA kernel operating on a silt::tensor (dependency: silt), exposed to python through nanobind. The easiest way to run the example scripts is to install the wheel file provided in the releases section of this repository using pip.

Repository Structure

• /example: Example scripts and data
• /ext: Submodule dependencies
• /python: Python bindings generated w. nanobind
• /source: C++/CUDA primary implementation

Building from Source

Note: Tested and working on Windows

After cloning, update the submodules:

git submodule update --init --recursive

Build from source and install from this repository using pip:

pip install .

Re-building for development:

pip install --no-build-isolation -ve .

Build directly using CMake:

cmake -S . -B build
cmake --build build

Build Wheel Distributable:

pip wheel .

Details

If you are building from source, please follow the instructions in silt to make sure you have all required dependencies.