ClemensFischer/XAML-Map-Control
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Update MapGraticule.cs

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ClemensFischer 2026-02-06 11:59:57 +01:00
parent 4905e16df9
commit c8449be6ff
1 changed files with 12 additions and 7 deletions
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19
MapControl/Shared/MapGraticule.cs
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@ -101,11 +101,10 @@ namespace MapControl
{
var southWest = ParentMap.ViewToLocation(new Point(0d, ParentMap.ActualHeight));
var northEast = ParentMap.ViewToLocation(new Point(ParentMap.ActualWidth, 0d));
var lineDistance = GetLineDistance(MinLineDistance /
(ParentMap.ViewTransform.Scale * MapProjection.Wgs84MeterPerDegree));
var lineDistance = GetLineDistance(false);
var latLabelStart = Math.Ceiling(southWest.Latitude / lineDistance) * lineDistance;
var lonLabelStart = Math.Ceiling(southWest.Longitude / lineDistance) * lineDistance;
var labelFormat = GetLabelFormat(Math.Min(lineDistance, lineDistance));
var labelFormat = GetLabelFormat(lineDistance);
for (var lat = latLabelStart; lat <= northEast.Latitude; lat += lineDistance)
{
@ -129,9 +128,8 @@ namespace MapControl
private void DrawGraticule(PathFigureCollection figures, List<Label> labels)
{
var lineDistance = GetLineDistance(MinLineDistance /
(ParentMap.ViewTransform.Scale * MapProjection.Wgs84MeterPerDegree * Math.Cos(ParentMap.Center.Latitude * Math.PI / 180d)));
var labelFormat = GetLabelFormat(Math.Min(lineDistance, lineDistance));
var lineDistance = GetLineDistance(true);
var labelFormat = GetLabelFormat(lineDistance);
GetLatitudeRange(lineDistance, out double minLat, out double maxLat);
@ -278,8 +276,15 @@ namespace MapControl
}
}
private static double GetLineDistance(double minDistance)
private double GetLineDistance(bool scaleByLatitude)
{
var minDistance = MinLineDistance / (ParentMap.ViewTransform.Scale * MapProjection.Wgs84MeterPerDegree);
if (scaleByLatitude)
{
minDistance /= Math.Cos(ParentMap.Center.Latitude * Math.PI / 180d);
}
minDistance = Math.Max(minDistance, lineDistances.First());
minDistance = Math.Min(minDistance, lineDistances.Last());