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Version 4.10.0: Added MapProjections library project.

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ClemensF 2018-10-03 11:27:55 +02:00
parent 0d0b98d7d7
commit 358f9adc03
1 changed files with 50 additions and 30 deletions
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96
MapProjections/Shared/UtmProjection.cs
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@ -3,6 +3,9 @@
// Licensed under the Microsoft Public License (Ms-PL)
using System;
#if !WINDOWS_UWP
using System.Windows;
#endif
namespace MapControl.Projections
{
@ -10,47 +13,64 @@ namespace MapControl.Projections
{
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]]";
private string zoneName;
public string ZoneName
public UtmProjection()
{
get { return zoneName; }
set
{
var zoneNumber = 0;
var falseNorthing = 0;
var epsgCode = 0;
if (!string.IsNullOrEmpty(value))
{
if (value.EndsWith("N"))
{
epsgCode = 32600;
}
else if (value.EndsWith("S"))
{
falseNorthing = 10000000;
epsgCode = 32700;
}
if (epsgCode > 0)
{
int.TryParse(value.Substring(0, value.Length - 1), out zoneNumber);
}
}
if (zoneNumber < 1 || zoneNumber > 60)
{
throw new ArgumentException("Invalid UTM zone name.");
}
zoneName = value;
epsgCode += zoneNumber;
var centralMeridian = 6 * zoneNumber - 183;
WKT = string.Format(wktFormat, zoneName, centralMeridian, falseNorthing, epsgCode);
TrueScale = 0.9996 * MetersPerDegree;
}
private string zone;
public string Zone
{
get { return zone; }
set
{
if (zone != value)
{
if (string.IsNullOrEmpty(value))
{
throw new ArgumentException("Invalid UTM zone.");
}
var hemisphere = value[value.Length - 1];
int zoneNumber;
if ((hemisphere != 'N' && hemisphere != 'S') ||
!int.TryParse(value.Substring(0, value.Length - 1), out zoneNumber))
{
throw new ArgumentException("Invalid UTM zone.");
}
SetZone(zoneNumber, hemisphere == 'N');
}
}
}
public void SetZone(int zoneNumber, bool north)
{
if (zoneNumber < 1 || zoneNumber > 60)
{
throw new ArgumentException("Invalid UTM zone number.");
}
var zoneName = zoneNumber.ToString() + (north ? "N" : "S");
if (zone != zoneName)
{
var centralMeridian = zoneNumber * 6 - 183;
var falseNorthing = north ? 0 : 10000000;
var authorityCode = (north ? 32600 : 32700) + zoneNumber;
zone = zoneName;
WKT = string.Format(wktFormat, zone, centralMeridian, falseNorthing, authorityCode);
}
}
public void SetZone(Location location)
{
var zoneNumber = Math.Min((int)(Location.NormalizeLongitude(location.Longitude) + 180d) / 6 + 1, 60);
SetZone(zoneNumber, location.Latitude >= 0);
}
}
}