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ProjNET

2.1.014M downloads/moNetTopologySuite/ProjNet4GeoAPI ↗New releases in your daily digest, changelog included.

.NET Spatial Reference and Projection Engine. Proj.NET performs point-to-point coordinate conversions between geodetic coordinate systems for use in fx. Geographic Information Systems (GIS) or GPS applications. The spatial reference model used adheres to the Simple Features specification.

Last release 1 years ago
18 Aug 2025
Ships on a steady schedule
a new release about every 6.7 years
Some releases are documented
notes for 1 of 3 stable releases
Nothing withdrawn
no release was ever pulled
15 years old
3 releases · first in 2012

Release timeline

3 releases since 2012

Releases

2.1.018 Aug 2025
Nothing published for this version
2.0.026 Aug 2019
Release of ProjNET without GeoAPI.
Release of ProjNET without GeoAPI.

Now targets .NET Standard 2.0 only

GeoAPI references removed; the relevant useful stuff has been moved inside this package (namespaces updated).

A few redundant interfaces have been removed.

Significantly reduced managed heap allocations in performance-critical methods.

Added support in the base classes to implement bulk transformations.

Currently, few "in-the-box" methods actually take advantage of this, but it gives external and (possible) future implementations more options to resolve bottlenecks without having to abandon the Proj.NET abstractions entirely.

Add "hotine_oblique_mercator_azimuth_center" as an additional alias for that projection (unblocks 11 EPSG codes, including EPSG:2056)

Implemented the "lambert_azimuthal_equal_area" projection (unblocks 18 EPSG codes, including EPSG:3035).

Callers no longer need to specify an Encoding to parse something that's already in text form

Other resolved issues:

#32: Geocentric Coordinate System WKT Support

#10: ConcatenatedTransform.Inverse() method destroys the state of child transformations

#20: Math transform bug

#37: Issues with 3857 to 25832

#12: Make MapProjection.CalcUtmZone public

#26: MathTransform.Transform modifies the original ICoordinateSequence

#17: Convert latitude/longitude to Canada grid NAD83 (epsg:26910)