README.md

---
title: SAM3 BA
emoji: "\U0001F3D7"
colorFrom: gray
colorTo: green
sdk: gradio
sdk_version: "5.29.0"
app_file: app.py
pinned: false
license: mit
---

# Janus

GIS-ready building footprint extraction from aerial imagery using SAM 3.

Upload a high-resolution aerial image with its world file, and Janus extracts
every building as georeferenced vector polygons (GeoPackage, GeoJSON, WKT).