Basic implementation of tile server for .NET 5 platform. Provides access to tiles stored in several source types and serving them using various protocols.

• Supported tile sources:

• Supported protocols (service endpoints) for serving tiles:

• Coordinate system / tile grid support: Web Mercator / Spherical Mercator / EPSG:3857, basic support for geodetic EPSG:4326.
• Tile image formats: raster (PNG, JPEG, WEBP) 256×256 pixels tiles, basic support of TIFF output and PBF / MVT (vector tiles).
• Local cache for tiles from external tile services sources (modified mbtiles format database file, EPSG:3857 only), with blank tiles detection support.
• Configuration in JSON file.

Developed using MS Visual Studio 2019 with .NET 5 SDK. Using

• Microsoft.Data.Sqlite for working with SQLite database.
• SkiaSharp for raster images processing.
• BitMiracle.LibTiff.NET for reading source GeoTIFF files and creating output TIFF images.
• Npgsql .NET data provider for PostgreSQL.
• Leaflet for map demo page.
• NUnit for tests.

Tile sources are defined in appsettings.json configuration file.

Check presence of .NET 5 runtime on target system using command:

dotnet --info

The Microsoft.AspNetCore.App 5.0.3 (or later version) should present in list.

Run the application using command:

dotnet TileMapService.dll

After start, it will listen on default TCP port 5000 (using in-process Kestrel web server) and tile service with demo page will be available on http://localhost:5000/ address; to enable remote calls allow connections to this port in firewall settings.

• Support for more formats (image formats, vector tiles) and coordinate systems (tile grids).
• Include test dataset(s) created from free data.
• WMS and Vector Tiles (mvt) client in Web UI.
• Flexible settings of tile sources.
• Compare with reference implementations.
• Using metatiles for better tiles quality.
• Configuration Web UI.
• Extended diagnostics, error handling and logging.
• Performance tests.
• Live demo.

• World Countries MBTiles by ArcGIS / EsriAndroidTeam
• Satellite Lowres raster tiles Planet by MapTiler
• Custom vector tiles from Georaphy Class example MVT

All external tile sources (services) in the provided appsettings.json file are only for development / testing, not for production use.

• MBTiles 1.3 Specification
• Tile Map Service Specification
• OpenGIS Web Map Tile Service Implementation Standard
• Serving Dynamic Vector Tiles from PostGIS
• GeoTIFF Format Specification
• Using TMS in Leaflet
• QGIS as OGC Data Client