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Make GraticuleFeatureLayer show less squares in grid

#1

Here’s what my GraticuleFeatureLayer currently looks like:

image.png770×431 61.7 KB

As you can see, it’s showing basically every long/lat line. What I want to have is what the example for the web version shows like so:

How can I go about doing this? Below is the relevant snippet from my code:

private void map_Loaded(object sender, RoutedEventArgs e)
{
    Map1.Focus();
    Map1.MapUnit = GeographyUnit.DecimalDegree;
    
    ShapeFileFeatureLayer worldLayer = new ShapeFileFeatureLayer(@"C:/Users/dsweaver/Downloads/Countries02.shp");
    AreaStyle areaStyle = new AreaStyle();
    areaStyle.FillSolidBrush = new GeoSolidBrush(GeoColor.FromArgb(255, 233, 232, 214));
    areaStyle.OutlinePen = new GeoPen(GeoColor.FromArgb(255, 118, 138, 69), 1);
    areaStyle.OutlinePen.DashStyle = LineDashStyle.Solid;
    worldLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = areaStyle;
    worldLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

    GraticuleFeatureLayer graticuleAdornmentLayer = new GraticuleFeatureLayer();
    graticuleAdornmentLayer.GraticuleLineStyle.OuterPen.Color = GeoColor.FromArgb(125, GeoColor.StandardColors.Navy);

    worldOverlay.Layers.Add(new BackgroundLayer(new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean)));
    worldOverlay.Layers.Add(worldLayer);
    worldOverlay.Layers.Add("graticule", graticuleAdornmentLayer);

    Map1.Overlays.Add("WorldOverlay", worldOverlay);

    Map1.Refresh();
}

Thanks!

#2

Hi Dan,

The code as below should works for you, please modify the DrawingMarginInPixel value:

        Map1.Focus();
        Map1.MapUnit = GeographyUnit.DecimalDegree;

        ShapeFileFeatureLayer worldLayer = new ShapeFileFeatureLayer(@"C:/Users/dsweaver/Downloads/Countries02.shp");
        AreaStyle areaStyle = new AreaStyle();
        areaStyle.FillSolidBrush = new GeoSolidBrush(GeoColor.FromArgb(255, 233, 232, 214));
        areaStyle.OutlinePen = new GeoPen(GeoColor.FromArgb(255, 118, 138, 69), 1);
        areaStyle.OutlinePen.DashStyle = LineDashStyle.Solid;
        worldLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = areaStyle;
        worldLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

        GraticuleFeatureLayer graticuleAdornmentLayer = new GraticuleFeatureLayer();
        graticuleAdornmentLayer.DrawingMarginInPixel = 50;        

        graticuleAdornmentLayer.GraticuleLineStyle.OuterPen.Color = GeoColor.FromArgb(125, GeoColor.StandardColors.Navy);

        LayerOverlay worldOverlay = new LayerOverlay();
        worldOverlay.Layers.Add(new BackgroundLayer(new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean)));
        worldOverlay.Layers.Add(worldLayer);

        LayerOverlay worldOverlay2 = new LayerOverlay();
        worldOverlay2.TileType = TileType.SingleTile;
        worldOverlay2.Layers.Add("graticule", graticuleAdornmentLayer);

        Map1.Overlays.Add("WorldOverlay", worldOverlay);
        Map1.Overlays.Add("WorldOverlay2", worldOverlay2);

        Map1.Refresh();

Wish that’s helpful.

Regards,

Ethan

#3

Works great, thanks! One quick question, how would I go about changing this to a Mercator projection? Does that depend on the shape files I’m loading in, or can I just change the graticuleadornmentlayer’s projection?

#4

Hi Dan,

Yes you’re right, you should set the projection value for graticuleAdornmentLayer, so make it suitable the data projection from 4326, and it will shows the correct value.

Regards,

Ethan

#5

Great, thanks again!

#6

Hi Dan,

Any question please let us know.

Regards,

Ethan