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40 lines
1.3 KiB
C#
40 lines
1.3 KiB
C#
#if WPF
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using System.Windows;
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#elif AVALONIA
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using Avalonia;
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#endif
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namespace MapControl.Projections
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{
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/// <summary>
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/// Elliptical Mercator Projection implemented by setting the WKT property of a ProjNetMapProjection.
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/// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/pp/1395/report.pdf), p.44-45.
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/// </summary>
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public class WorldMercatorProjection : ProjNetMapProjection
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{
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public WorldMercatorProjection()
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{
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CoordinateSystemWkt =
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"PROJCS[\"WGS 84 / World Mercator\"," +
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WktConstants.GeogCsWgs84 + "," +
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"PROJECTION[\"Mercator_1SP\"]," +
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"PARAMETER[\"latitude_of_origin\",0]," +
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"PARAMETER[\"central_meridian\",0]," +
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"PARAMETER[\"scale_factor\",1]," +
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"PARAMETER[\"false_easting\",0]," +
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"PARAMETER[\"false_northing\",0]," +
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"UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]]," +
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"AXIS[\"Easting\",EAST]," +
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"AXIS[\"Northing\",NORTH]," +
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"AUTHORITY[\"EPSG\",\"3395\"]]";
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}
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public override Point RelativeScale(double latitude, double longitude)
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{
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var k = MapControl.WorldMercatorProjection.RelativeScale(latitude);
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return new Point(k, k);
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}
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}
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}
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