usagi/gsi

Implementation of a map tile retriever for "Chi-ri-in-tile" ("地理院タイル"; ja-JP) of "Geospatial Information Authority of Japan" (GSI).

GSI

Implementation of a map tile retriever for "Chi-ri-in-tile" ("地理院タイル"; ja-JP) of "Geospatial Information Authority of Japan" (GSI).

Features

• Tile
  • Get a blob Vec<u8> of a tile using id, x, y, z, ext and params.
  • Get a image image::DynamicImage of a image tile.
  • Get a altitudes Vec<f64> of a DEM(.png; GSJ-Nishioka-Nagatsu-2015) tile.
  • Get a altitudes Vec<f64> of a DEM(.txt; CSV) tile.
• cocotile
  • Get a tile-ids as Vec<String>.
• Layers.txt
  • Get a Layers.txt as Layers.
    • Layers type = Layers.txt; {"layers":[{...},...]}
    • LayerVariant type = enum of Layer | LayerGroup
    • Layer type and LayerGroup type = entry of "type":"Layer" | "type":"LayerGroup"
  • Make/Store/Load CachedLayers (=HashMap<String, Layer>) feature for local Layer informations caching
    • Retrieve the other Layers.txt source file of "src" external referencing in Layer
      • Explicit enabling/disabling switching
    • .to_json_string, .to_json_vec; serde_json syntax sugar for storing a local Layer informations cache
    • .from_json_string, .from_json_slice; serde_json syntax sugar for loading a local Layer informations cache

Examples or Tests

• To see: tests/ and examples/

Reference

• https://maps.gsi.go.jp/development/ichiran.html; ja-JP
• https://www.gsj.jp/; ja-JP
• https://github.com/gsi-cyberjapan/gsimaps; ja-JP
• https://github.com/gsi-cyberjapan/layers-dot-txt-spec; ja-JP
  • https://github.com/gsi-cyberjapan/layers-dot-txt-spec/blob/master/list.md; ja-JP
• https://github.com/gsi-cyberjapan/cocotile-spec; ja-JP

See also

• https://maps.gsi.go.jp/development/demtile.html; ja-JP

License

• MIT

GSI files

These files are GSI's tiles. It's for only to use unit tests, no need essentially.

• tests/gsi-std-z14-x14622-y6017.png from https://cyberjapandata.gsi.go.jp/xyz/std/14/14622/6017.png

• tests/seamlessphoto-std-z14-x14622-y6017.jpg from https://cyberjapandata.gsi.go.jp/xyz/seamlessphoto/14/14622/6017.jpg

• https://www.gsi.go.jp/kikakuchousei/kikakuchousei40182.html; ja-JP

Author

• USAGI.NETWORK / Usagi Ito https://usagi.network/