Open-source spatial framework for .NET

Maps, geometry and earth measurement — in C#.

Maptor is a set of .NET libraries for spatial data: an OGC geometry model with analysis algorithms, readers and writers for the common GIS formats, coordinate reference systems, database adapters, and a WPF map control with layers, symbology and tile basemaps.

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Install dotnet add package IRI.Maptor.Core.Spatial

Core spatial engine. Other packages follow the same IRI.Maptor.* naming.

What is inside

Geometry and algorithms

OGC geometries, Delaunay and Voronoi, convex hull, simplification, KdTree and RTree indexes, graph algorithms, spatial machine learning.

Data I/O

Shapefile, GeoJSON, TopoJSON, KML, GPX, WKT/WKB, DXF, SVG, PDF export, GeoParquet, PMTiles, MBTiles, GeoPackage, and OGC services (WMS, WFS, GML, SLD).

Databases

SQL Server Spatial, PostgreSQL/PostGIS, SQLite, Esri Personal Geodatabase, EF Core spatial mapping.

WPF map control

An interactive MapViewer with layers, symbology, tile basemaps, markers, drawing and measuring tools, and a localization system covering 15 cultures with right-to-left support.

Three tiers

Dependencies flow downward: the WPF tier uses the infrastructure tier, which uses the UI-free core.

IRI.Maptor.Presentation

UI and presentation (net8.0-windows): the WPF MapViewer, MVVM infrastructure, layers and symbology, tile services, localization.

IRI.Maptor.Infrastructure

Infrastructure and persistence adapters (net8.0): SQL Server, PostGIS, SQLite, EF Core, Personal GDB, web APIs, GDI+ raster.

IRI.Maptor.Core

Core libraries (netstandard2.1, UI-free): primitives, spatial engine and format I/O, reference systems, Shapefile, OGC, graphs, ML, PDF, security, persistence abstractions.

Learn by example

Every sample is one folder with its code, a README and a screenshot — from a 40-line map application to a gallery of WPF controls.