---
license: other
license_name: research-use
pretty_name: SAR-Sim external assets
tags:
  - unmanned-aerial-vehicles
  - air-traffic-simulation
  - urban-air-mobility
  - unity
  - unreal-engine
  - airsim
size_categories:
  - n<1K
---

# SAR-Sim — external assets

Large authoring assets for the **Structured Air-Route Simulation System (SAR-Sim)**
repository. They are published here because Git cannot carry them: the Shenzhen
whitebox scene alone is 599 MiB, and the imported city-model cache it references
adds about 1.05 GiB.

The main repository is self-contained for the study scene (`1.unity`, Xinjiekou).
Only the **joint-simulation demonstration** against the Shenzhen whitebox needs
the files in this dataset.

## Contents

| Path in this dataset | Size | Destination in the repository |
|---|---|---|
| `Assets/Resources/Scenes/ShenzhenSKPWhitebox.unity` | 599 MiB | same relative path |
| `Assets/Resources/Scenes/ShenzhenSKPWhitebox.unity.meta` | 155 B | same relative path |
| `Assets/ImportedCityModels/` | ~1.05 GiB, 184 files | same relative path |
| `ue_import/` | ~321 MiB, 11 files | repository root |

`Assets/ImportedCityModels/` is kept wholesale on purpose: it holds the 97 `.meta`
files whose GUIDs the scene references. Copying the folder without them breaks
every building reference in the scene.

`ue_import/` holds the exported OBJ meshes used to rebuild the Unreal level
(`city/`), the locker props (`lockers/`) and the `TestArea` import script
(`testarea/`). Screenshots are not included.

## How to use it

1. Download this dataset (or only the parts you need) and copy the paths above
   into the repository root, preserving the relative layout.
2. Open `UnrealHost/SZ_TestArea/SZ_TestArea.uproject` in Unreal Engine 4.27 with
   the AirSim 1.8.1 plugin installed under `Plugins/AirSim`.
3. Copy `JointSimulation/settings.example.json` to `Documents/AirSim/settings.json`.
4. Follow the joint-simulation section of the main `README.md`.

`ue_import/README_IMPORT.txt` and `ue_import/settings.json` carry the import
settings and the coordinate convention (Unreal X = north, Y = east, Z = up, in
centimetres, origin at WGS84 113.943589 E, 22.484868 N).

## Licence and provenance

The city geometry derives from CADMapper and OpenStreetMap extracts of Shenzhen
(Nanshan, Futian, Longhua, Bao'an) and is redistributed here for research
reproduction. See the main repository's `LICENSE` and `THIRD_PARTY_NOTICES.md`.