SSMO is a lightweight, browser-based tool for creating and editing map overlays. It can work offline (albeit performance is better with connections allowed) and stores data locally, making it ideal for personal mapping projects.
- Download
index.htmlto your preferred directory - Open
index.htmland jump right in on your browser
- Left-aligned toolbar for map edits
- Changes are automatically saved via IndexedDB
- Runs offline [with overlay changes persistent] after initial setup
- 100% free
please dont read too far into this. it's just a demonstration.
This project stores data in your browser. It needs to make at least one initial callout to OpenMaps API or it will fail. A hard refresh (ctrl+shift+R) might also cause issues. The more you initially load in, the better it works.
error if connections are blocked on bootup. requires 1 initial connection.
potential errors if hard refresh offline. close and re-open browser to resolve.
edits & changes still store locally when all connections blocked.
zooming in-and-out when entirely offline can be wonky. could be resolved if I was better at caching.
This project is licensed under the MIT License.
Feel free to submit pull requests or issues.