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Updated MapProjections

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This commit is contained in:
Clemens 2022-01-21 00:17:01 +01:00
parent c6c597a142
commit 544ac32ee3
5 changed files with 129 additions and 112 deletions
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98
MapProjections/Shared/GeoApiProjectionFactory.cs
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@ -11,40 +11,90 @@ namespace MapControl.Projections
{
public class GeoApiProjectionFactory : MapProjectionFactory
{
public const int WorldMercator = 3395;
public const int WebMercator = 3857;
public const int Etrs89UtmNorthFirst = 25828;
public const int Etrs89UtmNorthLast = 25838;
public const int Wgs84UtmNorthFirst = 32601;
public const int Wgs84UtmNorthLast = 32660;
public const int Wgs84UpsNorth = 32661;
public const int Wgs84UtmSouthFirst = 32701;
public const int Wgs84UtmSouthLast = 32760;
public const int Wgs84UpsSouth = 32761;
private readonly Dictionary<int, string> wkts = new Dictionary<int, string>();
private readonly HttpClient httpClient = new HttpClient();
public override MapProjection CreateProjection(string projectionDefinition)
public override MapProjection CreateProjection(string crsId)
{
var projection = base.CreateProjection(projectionDefinition);
MapProjection projection = null;
if (projection == null &&
projectionDefinition.StartsWith("EPSG:") &&
int.TryParse(projectionDefinition.Substring(5), out int epsgCode))
if (crsId.StartsWith("EPSG:") && int.TryParse(crsId.Substring(5), out int epsgCode))
{
if (epsgCode >= 32601 && epsgCode <= 32660)
switch (epsgCode)
{
projection = new UtmProjection(epsgCode - 32600, true);
}
else if (epsgCode == 32661)
{
projection = new UpsNorthProjection();
}
else if (epsgCode >= 32701 && epsgCode <= 32760)
{
projection = new UtmProjection(epsgCode - 32700, false);
}
else if (epsgCode == 32761)
{
projection = new UpsSouthProjection();
}
else
{
projection = new GeoApiProjection(GetWkt(epsgCode));
case WorldMercator:
projection = new WorldMercatorProjection();
break;
case WebMercator:
projection = new WebMercatorProjection();
break;
case int c when c >= Etrs89UtmNorthFirst && c <= Etrs89UtmNorthLast:
projection = new GeoApiProjection(GetEtrs89UtmWkt(epsgCode));
break;
case int c when c >= Wgs84UtmNorthFirst && c <= Wgs84UtmNorthLast:
projection = new UtmProjection(epsgCode - Wgs84UtmNorthFirst + 1, true);
break;
case int c when c >= Wgs84UtmSouthFirst && c <= Wgs84UtmSouthLast:
projection = new UtmProjection(epsgCode - Wgs84UtmSouthFirst + 1, false);
break;
case Wgs84UpsNorth:
projection = new UpsNorthProjection();
break;
case Wgs84UpsSouth:
projection = new UpsSouthProjection();
break;
default:
projection = new GeoApiProjection(GetWkt(epsgCode));
break;
}
}
return projection;
return projection ?? base.CreateProjection(crsId);
}
private static string GetEtrs89UtmWkt(int epsgCode)
{
const string etrs89UtmWktFormat
= "PROJCS[\"ETRS89 / UTM zone {1}N\","
+ "GEOGCS[\"ETRS89\","
+ "DATUM[\"European_Terrestrial_Reference_System_1989\","
+ "SPHEROID[\"GRS 1980\",6378137,298.257222101,AUTHORITY[\"EPSG\",\"7019\"]],"
+ "TOWGS84[0,0,0,0,0,0,0],AUTHORITY[\"EPSG\",\"6258\"]],"
+ "PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],"
+ "UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]],"
+ "AUTHORITY[\"EPSG\",\"4258\"]],"
+ "PROJECTION[\"Transverse_Mercator\"],"
+ "PARAMETER[\"latitude_of_origin\",0],"
+ "PARAMETER[\"central_meridian\",{2}],"
+ "PARAMETER[\"scale_factor\",0.9996],"
+ "PARAMETER[\"false_easting\",500000],"
+ "PARAMETER[\"false_northing\",0],"
+ "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],"
+ "AXIS[\"Easting\",EAST],"
+ "AXIS[\"Northing\",NORTH],"
+ "AUTHORITY[\"EPSG\",\"{0}\"]]";
int centralMeridian = 6 * (epsgCode - Etrs89UtmNorthFirst) - 15;
return string.Format(etrs89UtmWktFormat, epsgCode, epsgCode - 25800, centralMeridian);
}
private string GetWkt(int epsgCode)