OSM MapControl

Delphi/Lazarus visual component for displaying OpenStreetMap map. Also includes helper classes for storing and downloading map tiles. Demo project implements downloading map tiles from network.

❗ Alpha version, interface could change ❗

Compatibility

Tested on:

• Delphi XE2 and 10.1, VCL, Windows
• Lazarus 2.1.0 trunk & FPC 3.3.1 trunk, LCL, Windows / Linux

Project structure

• OSM.SlippyMapUtils - util functions, variables and types
• OSM.TileStorage - classes TTileBitmapCache implementing cache of map tiles organized as a queue and TTileStorage implementing disc storage of map tiles.
• OSM.NetworkRequest - utils and classes for network requesting of map tiles. Class TNetworkRequestQueue implements threaded non-blocking queue of network requests. Unit doesn't contain any real network request engine.
• OSM.NetworkRequest.Synapse, OSM.NetworkRequest.WinInet, OSM.NetworkRequest.RTL contain concrete implementations of network requesting routines
• OSM.MapControl contains classes TMapMark and TMapMarkList for managing a set of map points and TMapControl itself

Full docs for all units listed above is available here

Third party

If you wish to use Synapse network engine and don't have it yet, you can take it from Releases section.