Memory efficient and synchronous downloader of map tiles. Allows for a fast and easy approach to make map tiles (from a WMS) available offline.
npm i map-tiles-crawler (-g for global install)
mtc --url http://maps.wien.gv.at/basemap/bmaporthofoto30cm/normal/google3857/{z}/{y}/{x}.jpeg \
--target ./.tmp/ \
--level 18 \
--topLeft 47.46465597:11.91329956 \
--bottomRight 47.46140645:11.9243288 \
--wait 100
var crawler = require('map-tiles-crawler');
crawler.crawl({
url: 'http://maps.wien.gv.at/basemap/bmaporthofoto30cm/normal/google3857/{z}/{y}/{x}.jpeg' ,
targetFolder: './.tmp' ,
level : 18 ,
topLeft: [47.46575119, 11.92384601] ,
bottomRight: [47.46068834, 11.91423297] ,
wait: 100 ,
progress : (tile) => { // callback after tile download } ,
success : () => { // callback after all tiles are downloaded } ,
error : (tile) => { // callback if a tile couldn't be downloaded }
});| Param | Description |
|---|---|
| url | the url of the WMS endpoint with coordinates as placeholders in the url e.g.: http://maps.wien.gv.at/basemap/bmaporthofoto30cm/normal/google3857/{z}/{y}/{x}.jpeg |
| targetFolder | The filesystem folder, where all files will be downloaded to |
| level | The zoom level for the crawling |
| topLeft | the top-left geo-coordinate of the area to crawl as array |
| bottomRight | the bottom-right geo-coordinate of the area to crawl as array |
| wait | waiting time after each tile download, this allows for throttling the downloads |
| progress | callback after each tile download |
| success | callback after all tiles were downloaded successfully |
| error | callback after a error happened |
