Andrea Puca's blog

Tile Server - Coordinate Transformation

A tile server is a particular service that allow user to retrieve preprocessed map data. It can be done using a particular protocol for retrieve data:

  • TMS if map tiles are stored locally
  • WTMS if map tiles are stored on a server

Normally the choosen protocol divide the large image in many sub image, that is named pyramidal subdivision, in that case we have many zoom level (2n*2n) and a lot of tile that need to be processed.