mirror of
https://github.com/ClemensFischer/XAML-Map-Control.git
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56 lines
2.2 KiB
C#
56 lines
2.2 KiB
C#
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// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
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// © 2018 Clemens Fischer
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// Licensed under the Microsoft Public License (Ms-PL)
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using System;
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namespace MapControl.Projections
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{
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public class UtmProjection : GeoApiProjection
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{
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private static readonly string wktFormat = "PROJCS[\"WGS 84 / UTM zone {0}\", GEOGCS[\"WGS 84\", DATUM[\"WGS_1984\", SPHEROID[\"WGS 84\", 6378137, 298.257223563, AUTHORITY[\"EPSG\", \"7030\"]], AUTHORITY[\"EPSG\", \"6326\"]], PRIMEM[\"Greenwich\", 0, AUTHORITY[\"EPSG\", \"8901\"]], UNIT[\"degree\", 0.01745329251994328, AUTHORITY[\"EPSG\", \"9122\"]], AUTHORITY[\"EPSG\", \"4326\"]], UNIT[\"metre\", 1, AUTHORITY[\"EPSG\", \"9001\"]], PROJECTION[\"Transverse_Mercator\"], PARAMETER[\"latitude_of_origin\", 0], PARAMETER[\"central_meridian\", {1}], PARAMETER[\"scale_factor\", 0.9996], PARAMETER[\"false_easting\", 500000], PARAMETER[\"false_northing\", {2}], AUTHORITY[\"EPSG\", \"{3}\"], AXIS[\"Easting\", EAST], AXIS[\"Northing\", NORTH]]";
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private string zoneName;
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public string ZoneName
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{
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get { return zoneName; }
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set
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{
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var zoneNumber = 0;
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var falseNorthing = 0;
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var epsgCode = 0;
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if (!string.IsNullOrEmpty(value))
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{
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if (value.EndsWith("N"))
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{
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epsgCode = 32600;
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}
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else if (value.EndsWith("S"))
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{
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falseNorthing = 10000000;
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epsgCode = 32700;
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}
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if (epsgCode > 0)
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{
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int.TryParse(value.Substring(0, value.Length - 1), out zoneNumber);
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}
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}
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if (zoneNumber < 1 || zoneNumber > 60)
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{
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throw new ArgumentException("Invalid UTM zone name.");
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}
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zoneName = value;
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epsgCode += zoneNumber;
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Wkt = string.Format(wktFormat, zoneName, 6 * zoneNumber - 183, falseNorthing, epsgCode);
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TrueScale = 0.9996 * MetersPerDegree;
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}
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}
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}
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}
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