WORLDSAR Documentation

3. Required Runtime Assets

Before any run mode, ensure container and SNAP assets are available and understood.

3.1 SIF Container

Use one of:

make pull-sif

Or (local .tmp cache mode):

make pull-sif-generic

pull-sif uses configured Hugging Face cache variables. pull-sif-generic uses project-local temporary caching.

3.2 SNAP Userdir (.snap)

The Makefile supports:

make pull-snap

This downloads:

  • https://huggingface.co/datasets/WORLDSAR/Support/resolve/main/snap_userdir.tar.gz

The archive is extracted so .snap ends up in project root. Temporary download/extract artifacts are cleaned. Both make run and make run-vm enforce this via ensure-snap.

3.3 DEM Note

On SpaceHPC, DEM data is already available, so no manual DEM download is required.

DEM must be downloaded only if internet access is unavailable.

If internet is available at runtime, SNAP can fetch DEM data when needed.