# WeMAPI

> Free, browser-based Web GIS platform for creating, editing, and converting geospatial data. No installation or sign-up required.

## What is WeMAPI?

WeMAPI is an open-source Web GIS tool that runs entirely in the browser. It lets users draw points, lines, polygons, rectangles, and circles on a map, edit their properties, and import/export data in multiple geospatial formats including GeoJSON, KML, GPX, CSV, TopoJSON, and Shapefile. All data is saved locally in IndexedDB — no server or account needed.

## Key Features

- Draw and edit geographic features (Point, LineString, Polygon, Rectangle, Circle)
- Vertex editing, property editing, undo/redo
- Table view for bulk editing of all features
- Feature combine (merge) and split operations
- Multi-format import: GeoJSON, KML, GPX, CSV/TSV, TopoJSON
- Multi-format export: GeoJSON, KML, CSV, TopoJSON, Shapefile
- Distance, area, and coordinate measurement tools
- Address and place search via GSI (Geospatial Information Authority of Japan) API
- Automatic save/restore with IndexedDB
- Bilingual UI (Japanese / English)
- Basemap switching: OpenStreetMap, GSI Maps (Japan)

## Tech Stack

- Vanilla TypeScript + Vite (no framework)
- MapLibre GL JS for map rendering
- Runs as a static site (Cloudflare Pages compatible)

## Links

- [Landing Page (Japanese)](https://wemapi.com/landing.html): Product introduction in Japanese
- [Landing Page (English)](https://wemapi.com/landing-en.html): Product introduction in English
- [Map Editor](https://wemapi.com/): The GIS editor application
- [GitHub Repository](https://github.com/not-stop-gis/WeMAPI): Source code (open source)