纯前端地理处理与预览工具集。所有计算在浏览器本地完成，数据不上传服务器。
Import Shapefile, GeoJSON, KML, GeoPackage and more — preview on map with automatic CRS reprojection, and export in your target format. All in the browser.
View and convert GeoTIFF, COG, and other raster formats in your browser — no upload, no server, powered by GDAL.
Transform coordinates between CRS systems: WGS84, CGCS2000, GCJ-02, BD-09 and more.