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Using Mapsui, how do I create a new transformation class for coordinate system read from shapefile prj file?

projection/pyproj puzzle, and understanding SRS formatogr2ogr failed to reproject shapefile error exceeds limitsproj.4 definition for Moscow GCS_Bessel_1841 to WGS84 convertionIn arcpy, if I subclass the arcpy Spatial Reference class, what is the object argument I would use in the subclass definition?QGIS reference system problemReprojecting vector layer from EPSG 3857 to 4326?How do I get imported KML circles to appear as circles rather than ellipses in QGIS?Converting CRS?Why are my vector layers with different CRS not aligning?Why is there a transformation shift/distortion of ~1.5km in OpenLayers 5.3.0 going from EPSG:4326 to EPSG:3857?

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How do I create a new transformation class compatible with MapSui.Projections.ITransformation interface using ProjNet4GeoAPI that reads the source coordindate system from a prj file.

From Mapsui source code, there is a MinimalTransformation that implements ITransformation interface to convert between SphericalMercator and WGS84.

From Mapsui documentation :
The out of the box Mapsui support for projections is limited. The MinimalProjection class only projects between SphericalMercator (EPSG:3857) and WGS84 (EPSG:4326). It is however possible to create your own Transformation. You need to implement the ITransformation interface. Within this implementation you need to use some other projection library. A recommended one is ProjNet4GeoAPI.

I can create a working the transformation class with ProjNet4GeoAPI but it implements GeoAPI.CoordinateSystems.Transformations.ICoordinateTransformation not Mapsui.Projection.ITransformation

            // (FROM SOURCE) prj name: NAD_1983_StatePlane_Massachusetts_Mainland_FIPS_2001"

            ICoordinateSystemFactory csFac = new ProjNet.CoordinateSystems.CoordinateSystemFactory();

            string file = @"C:DRC_DataArcviewUSATownshipsNYTOWNS_POLY.prj";

            string wkt= System.IO.File.ReadAllText(file);

            var csFrom = csFac.CreateFromWkt(wkt);



            //(TO) Prj name: "WGS 84 / Pseudo-Mercator"

            file = @"C:DRC_DataArcview3857.prj";

            wkt = System.IO.File.ReadAllText(file);

            ICoordinateSystem csTo = csFac.CreateFromWkt(wkt);



            //Step 2) Create transformation class.

            CoordinateTransformationFactory ctFac = new CoordinateTransformationFactory();



            //To 3857                

            //var is ICoordinateTransformation

            ICoordinateTransformation ct = ctFac.CreateFromCoordinateSystems(csFrom, ProjNet.CoordinateSystems.ProjectedCoordinateSystem.WebMercator);

How do I use the ICoordinateTransformation class with Mapsui?
Do I create a projection class like SphericalMercator in Mapsui.Projection
(see code below)?

From Mapsui.Projection:

public class MinimalTransformation : ITransformation

    {

        private readonly IDictionary<string, Func<double, double, Point>> _toLonLat = new Dictionary<string, Func<double, double, Point>>();

        private readonly IDictionary<string, Func<double, double, Point>> _fromLonLat = new Dictionary<string, Func<double, double, Point>>();



        public MinimalTransformation()

        {

            _toLonLat["EPSG:4326"] = (x, y) => new Point(x, y);

            _fromLonLat["EPSG:4326"] = (x, y) => new Point(x, y);

            _toLonLat["EPSG:3857"] = SphericalMercato.ToLonLat;

            _fromLonLat["EPSG:3857"] = SphericalMercator.FromLonLat;

        }

coordinate-system

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asked 5 mins ago

Gary KindelGary Kindel

1386

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0

How do I create a new transformation class compatible with MapSui.Projections.ITransformation interface using ProjNet4GeoAPI that reads the source coordindate system from a prj file.

From Mapsui source code, there is a MinimalTransformation that implements ITransformation interface to convert between SphericalMercator and WGS84.

From Mapsui documentation :
The out of the box Mapsui support for projections is limited. The MinimalProjection class only projects between SphericalMercator (EPSG:3857) and WGS84 (EPSG:4326). It is however possible to create your own Transformation. You need to implement the ITransformation interface. Within this implementation you need to use some other projection library. A recommended one is ProjNet4GeoAPI.

I can create a working the transformation class with ProjNet4GeoAPI but it implements GeoAPI.CoordinateSystems.Transformations.ICoordinateTransformation not Mapsui.Projection.ITransformation

            // (FROM SOURCE) prj name: NAD_1983_StatePlane_Massachusetts_Mainland_FIPS_2001"

            ICoordinateSystemFactory csFac = new ProjNet.CoordinateSystems.CoordinateSystemFactory();

            string file = @"C:DRC_DataArcviewUSATownshipsNYTOWNS_POLY.prj";

            string wkt= System.IO.File.ReadAllText(file);

            var csFrom = csFac.CreateFromWkt(wkt);



            //(TO) Prj name: "WGS 84 / Pseudo-Mercator"

            file = @"C:DRC_DataArcview3857.prj";

            wkt = System.IO.File.ReadAllText(file);

            ICoordinateSystem csTo = csFac.CreateFromWkt(wkt);



            //Step 2) Create transformation class.

            CoordinateTransformationFactory ctFac = new CoordinateTransformationFactory();



            //To 3857                

            //var is ICoordinateTransformation

            ICoordinateTransformation ct = ctFac.CreateFromCoordinateSystems(csFrom, ProjNet.CoordinateSystems.ProjectedCoordinateSystem.WebMercator);

How do I use the ICoordinateTransformation class with Mapsui?
Do I create a projection class like SphericalMercator in Mapsui.Projection
(see code below)?

From Mapsui.Projection:

public class MinimalTransformation : ITransformation

    {

        private readonly IDictionary<string, Func<double, double, Point>> _toLonLat = new Dictionary<string, Func<double, double, Point>>();

        private readonly IDictionary<string, Func<double, double, Point>> _fromLonLat = new Dictionary<string, Func<double, double, Point>>();



        public MinimalTransformation()

        {

            _toLonLat["EPSG:4326"] = (x, y) => new Point(x, y);

            _fromLonLat["EPSG:4326"] = (x, y) => new Point(x, y);

            _toLonLat["EPSG:3857"] = SphericalMercato.ToLonLat;

            _fromLonLat["EPSG:3857"] = SphericalMercator.FromLonLat;

        }

coordinate-system

share

asked 5 mins ago

Gary KindelGary Kindel

1386

add a comment | 

How do I create a new transformation class compatible with MapSui.Projections.ITransformation interface using ProjNet4GeoAPI that reads the source coordindate system from a prj file.

From Mapsui source code, there is a MinimalTransformation that implements ITransformation interface to convert between SphericalMercator and WGS84.

From Mapsui documentation :
The out of the box Mapsui support for projections is limited. The MinimalProjection class only projects between SphericalMercator (EPSG:3857) and WGS84 (EPSG:4326). It is however possible to create your own Transformation. You need to implement the ITransformation interface. Within this implementation you need to use some other projection library. A recommended one is ProjNet4GeoAPI.

I can create a working the transformation class with ProjNet4GeoAPI but it implements GeoAPI.CoordinateSystems.Transformations.ICoordinateTransformation not Mapsui.Projection.ITransformation

            // (FROM SOURCE) prj name: NAD_1983_StatePlane_Massachusetts_Mainland_FIPS_2001"

            ICoordinateSystemFactory csFac = new ProjNet.CoordinateSystems.CoordinateSystemFactory();

            string file = @"C:DRC_DataArcviewUSATownshipsNYTOWNS_POLY.prj";

            string wkt= System.IO.File.ReadAllText(file);

            var csFrom = csFac.CreateFromWkt(wkt);



            //(TO) Prj name: "WGS 84 / Pseudo-Mercator"

            file = @"C:DRC_DataArcview3857.prj";

            wkt = System.IO.File.ReadAllText(file);

            ICoordinateSystem csTo = csFac.CreateFromWkt(wkt);



            //Step 2) Create transformation class.

            CoordinateTransformationFactory ctFac = new CoordinateTransformationFactory();



            //To 3857                

            //var is ICoordinateTransformation

            ICoordinateTransformation ct = ctFac.CreateFromCoordinateSystems(csFrom, ProjNet.CoordinateSystems.ProjectedCoordinateSystem.WebMercator);

How do I use the ICoordinateTransformation class with Mapsui?
Do I create a projection class like SphericalMercator in Mapsui.Projection
(see code below)?

From Mapsui.Projection:

public class MinimalTransformation : ITransformation

    {

        private readonly IDictionary<string, Func<double, double, Point>> _toLonLat = new Dictionary<string, Func<double, double, Point>>();

        private readonly IDictionary<string, Func<double, double, Point>> _fromLonLat = new Dictionary<string, Func<double, double, Point>>();



        public MinimalTransformation()

        {

            _toLonLat["EPSG:4326"] = (x, y) => new Point(x, y);

            _fromLonLat["EPSG:4326"] = (x, y) => new Point(x, y);

            _toLonLat["EPSG:3857"] = SphericalMercato.ToLonLat;

            _fromLonLat["EPSG:3857"] = SphericalMercator.FromLonLat;

        }

coordinate-system

share

asked 5 mins ago

Gary KindelGary Kindel

1386

            // (FROM SOURCE) prj name: NAD_1983_StatePlane_Massachusetts_Mainland_FIPS_2001"

            ICoordinateSystemFactory csFac = new ProjNet.CoordinateSystems.CoordinateSystemFactory();

            string file = @"C:DRC_DataArcviewUSATownshipsNYTOWNS_POLY.prj";

            string wkt= System.IO.File.ReadAllText(file);

            var csFrom = csFac.CreateFromWkt(wkt);



            //(TO) Prj name: "WGS 84 / Pseudo-Mercator"

            file = @"C:DRC_DataArcview3857.prj";

            wkt = System.IO.File.ReadAllText(file);

            ICoordinateSystem csTo = csFac.CreateFromWkt(wkt);



            //Step 2) Create transformation class.

            CoordinateTransformationFactory ctFac = new CoordinateTransformationFactory();



            //To 3857                

            //var is ICoordinateTransformation

            ICoordinateTransformation ct = ctFac.CreateFromCoordinateSystems(csFrom, ProjNet.CoordinateSystems.ProjectedCoordinateSystem.WebMercator);

public class MinimalTransformation : ITransformation

    {

        private readonly IDictionary<string, Func<double, double, Point>> _toLonLat = new Dictionary<string, Func<double, double, Point>>();

        private readonly IDictionary<string, Func<double, double, Point>> _fromLonLat = new Dictionary<string, Func<double, double, Point>>();



        public MinimalTransformation()

        {

            _toLonLat["EPSG:4326"] = (x, y) => new Point(x, y);

            _fromLonLat["EPSG:4326"] = (x, y) => new Point(x, y);

            _toLonLat["EPSG:3857"] = SphericalMercato.ToLonLat;

            _fromLonLat["EPSG:3857"] = SphericalMercator.FromLonLat;

        }

share

asked 5 mins ago

Gary KindelGary Kindel

1386

share

asked 5 mins ago

Gary KindelGary Kindel

1386

asked 5 mins ago

Gary KindelGary Kindel

1386

asked 5 mins ago

Gary KindelGary Kindel

1386