mirror of
https://github.com/ClemensFischer/XAML-Map-Control.git
synced 2025-12-06 07:12:04 +01:00
90 lines
3.3 KiB
C#
90 lines
3.3 KiB
C#
// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
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// © 2022 Clemens Fischer
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// Licensed under the Microsoft Public License (Ms-PL)
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using System.Collections.Generic;
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namespace MapControl.Projections
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{
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public class GeoApiProjectionFactory : MapProjectionFactory
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{
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public const int WorldMercator = 3395;
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public const int WebMercator = 3857;
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public const int AutoUtm = 42001;
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public const int Ed50UtmFirst = 23028;
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public const int Ed50UtmLast = 23038;
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public const int Etrs89UtmFirst = 25828;
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public const int Etrs89UtmLast = 25838;
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public const int Wgs84UtmNorthFirst = 32601;
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public const int Wgs84UtmNorthLast = 32660;
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public const int Wgs84UpsNorth = 32661;
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public const int Wgs84UtmSouthFirst = 32701;
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public const int Wgs84UtmSouthLast = 32760;
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public const int Wgs84UpsSouth = 32761;
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public Dictionary<int, string> CoordinateSystemWkts { get; } = new Dictionary<int, string>();
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public override MapProjection GetProjection(string crsId)
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{
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MapProjection projection = null;
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var str = crsId.StartsWith("EPSG:") ? crsId.Substring(5)
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: crsId.StartsWith("AUTO2:") ? crsId.Substring(6)
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: null;
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if (int.TryParse(str, out int code))
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{
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if (CoordinateSystemWkts.TryGetValue(code, out string wkt))
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{
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projection = new GeoApiProjection(wkt);
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}
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else
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{
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switch (code)
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{
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case WorldMercator:
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projection = new WorldMercatorProjection();
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break;
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case WebMercator:
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projection = new WebMercatorProjection();
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break;
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case AutoUtm:
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projection = new AutoUtmProjection();
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break;
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case int c when c >= Ed50UtmFirst && c <= Ed50UtmLast:
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projection = new Ed50UtmProjection(code % 100);
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break;
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case int c when c >= Etrs89UtmFirst && c <= Etrs89UtmLast:
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projection = new Etrs89UtmProjection(code % 100);
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break;
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case int c when c >= Wgs84UtmNorthFirst && c <= Wgs84UtmNorthLast:
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projection = new Wgs84UtmProjection(code % 100, true);
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break;
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case int c when c >= Wgs84UtmSouthFirst && c <= Wgs84UtmSouthLast:
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projection = new Wgs84UtmProjection(code % 100, false);
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break;
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case Wgs84UpsNorth:
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projection = new UpsNorthProjection();
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break;
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case Wgs84UpsSouth:
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projection = new UpsSouthProjection();
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break;
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default:
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break;
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}
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}
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}
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return projection ?? base.GetProjection(crsId);
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}
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}
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}
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