EncDotNet.S100.Crs.ProjNet

EncDotNet.S100.Crs.ProjNet implements the ICrsTransformFactory and ICrsTransform interfaces from EncDotNet.S100.Core (namespace EncDotNet.S100.Pipelines) with ProjNet. It reprojects coverage products, such as S-102, S-104 and S-111 grids in UTM, for display. It depends only on ProjNet, not on a map renderer, so headless consumers such as the EncDotNet.S100 facade and the s100 command-line tool use it without Mapsui. Reference it directly when you need coordinate transforms outside the facade.

Install

dotnet add package EncDotNet.S100.Crs.ProjNet

Example: UTM to Web Mercator

using EncDotNet.S100.Crs.ProjNet;
using EncDotNet.S100.Pipelines;

ICrsTransformFactory factory = new ProjNetCrsTransformFactory();
ICrsTransform toWebMercator = factory.Create("EPSG:32608", "EPSG:3857");
var (x, y) = toWebMercator.Transform(easting, northing);

Supported coordinate reference systems

ProjNetCrsTransformFactory.Create transforms between any two of these:

CRS	Codes	Use
WGS 84 / UTM	EPSG:32601–32660 (north), EPSG:32701–32760 (south)	The usual CRS of S-102, S-104 and S-111 coverage grids.
WGS 84	EPSG:4326	Geographic latitude and longitude.
WGS 84 / Pseudo-Mercator	EPSG:3857	Web Mercator, used to draw coverage rasters on a tiled map.

• Pass codes as "EPSG:4326" or "4326". Any other code throws NotSupportedException.
• Transforms to or from EPSG:3857 go through EPSG:4326 and use the spherical Web Mercator formulas, as map renderers do. ProjNet's ellipsoidal Mercator would place northings about 20 km off at 50°N.
• When the source and target strings are the same, ignoring case, Create returns IdentityCrsTransform.