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Improved MapProjections

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This commit is contained in:
ClemensF 2019-10-28 17:44:22 +01:00
parent 558dd2f98a
commit b607268e98
4 changed files with 27 additions and 58 deletions
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6
MapProjections/Shared/GeoApiProjection.cs
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@ -53,8 +53,6 @@ namespace MapControl.Projections
? string.Format("{0}:{1}", coordinateSystem.Authority, coordinateSystem.AuthorityCode)
: null;
IsWebMercator = CrsId == "EPSG:3857" || CrsId == "EPSG:900913";
var projection = (coordinateSystem as IProjectedCoordinateSystem)?.Projection;
if (projection != null)
@ -65,16 +63,20 @@ namespace MapControl.Projections
var falseNorthing = projection.GetParameter("false_northing");
var scaleFactor = projection.GetParameter("scale_factor");
HasLatLonBoundingBox = false;
IsNormalCylindrical =
centralMeridian != null && centralMeridian.Value == 0d &&
centralParallel != null && centralParallel.Value == 0d &&
(falseEasting == null || falseEasting.Value == 0d) &&
(falseNorthing == null || falseNorthing.Value == 0d);
IsWebMercator = CrsId == "EPSG:3857" || CrsId == "EPSG:900913";
TrueScale = (scaleFactor != null ? scaleFactor.Value : 1d) * Wgs84MetersPerDegree;
}
else
{
HasLatLonBoundingBox = true;
IsNormalCylindrical = true;
IsWebMercator = false;
TrueScale = 1d;
}
}