I have a polygon that I'm mapping using PolygonData and the polygon has multiple interior rings in it. The outer ring opens and closes at the same point and all the interior rings the same. But when all the points are added to a PolygonData and that object added to a Visualization Layer the interior rings do not show up correctly.
Here's the code that creates the Polygon and adds it to the layer:
var newPolygon = new PolygonData(){};
foreach (var point in locations)
{
newPolygon.Points.Add(new Location(point .Latitude,
point .Longitude));
}
Layer.Items.Add(newPolygon);
And the data in the "locations" variable as WKT:
POLYGON ((-114.19383099450356 47.663879150499071, -114.18843222500257 47.6638791505021, -114.18407467132894 47.663879170211686, -114.18844457499863 47.663860235997028, -114.18843677099585 47.660208114996841, -114.18301371299708 47.660259580999011, -114.18304228972342 47.663879150709334, -114.18303345549799 47.663879150500044, -114.18303345550481 47.667550185999943, -114.18303345550157 47.671165114022138, -114.17772366200229 47.671218273002218, -114.17236347100152 47.67118212600375, -114.16700330799755 47.671145703000889, -114.1670355039988 47.6747956870003, -114.16165525699935 47.674751762999, -114.15627500900067 47.674707839002089, -114.15090853999901 47.674696666002532, -114.13479260400219 47.674675870001, -114.13482541829066 47.685556842814478, -114.13480986200355 47.6855568850028, -114.13483633799729 47.689176732001847, -114.13752303039028 47.689166543515711, -114.13751726197243 47.6914363431781, -114.13482869649089 47.691436312139764, -114.13483022800158 47.690985085998285, 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(-114.15629559481573 47.6801024529974, -114.15630245699994 47.681900640000038, -114.15630243916604 47.681900640032708, -114.15629558096885 47.680102453010811, -114.15629559481573 47.6801024529974)
(-114.12408808200098 47.69639911760089, -114.124088081997 47.700015646251742, -114.11871395400296 47.700015646252474, -114.1133488558804 47.700015646461068, -114.11334883799951 47.700000372998815, -114.11871549999863 47.700007210001196, -114.12406804899972 47.70001379599961, -114.12405982300075 47.696399087003357, -114.12408808200098 47.69639911760089)
(-114.10960403488322 47.699988818223076, -114.10800238024807 47.699988792002259, -114.10263186849758 47.699988791999886, -114.09726135675 47.699988792001434, -114.09190274217059 47.699988792278226, -114.09190269499557 47.69994205500285, -114.09726421700053 47.699954641001113, -114.10262571099582 47.699966978004916, -114.10799434500599 47.6999838139992, -114.10960403488322 47.699988818223076)
(-114.09189493399755 47.692710546997446, -114.09189902200589 47.696296425003148, -114.09189900975508 47.696285688169844, -114.09189493399755 47.692710546997446)
(-114.09186217621264 47.681865943425152, -114.09186216969943 47.68186714324343, -114.09186208299902 47.681883105996512, -114.09186217621264 47.681865943425152)
(-114.09186706469841 47.683163676784858, -114.09187617200071 47.685504596001181, -114.09187605393174 47.685474249838911, -114.09186706469841 47.683163676784858)
(-114.07065622300188 47.634730579998525, -114.07066675699576 47.638353347999754, -114.07065643000105 47.641980841003907, -114.06529951399644 47.641988080001923, -114.05994190300059 47.641995071004111, -114.05457509800517 47.64199653300269, -114.04920829099851 47.641997716999676, -114.04919325499931 47.63837883500409, -114.04919896999746 47.6347491190033, -114.05456452599768 47.634745379997739, -114.05993008199877 47.634741363002206, -114.0652931389955 47.634736096001141, -114.07065622300188 47.634730579998525)
(-114.16677244674182 47.652930824638212, -114.16149302627555 47.652930822786281, -114.16149285399627 47.652903940003547, -114.16677244674182 47.652930824638212)
(-114.11325582699743 47.641929283002106, -114.11325199700444 47.645541243000942, -114.10790024799974 47.6455476770008, -114.10790271809852 47.643740184002262, -114.11057832900541 47.643737758001244, -114.110579410996 47.642834400002911, -114.10790396700509 47.64283643699811, -114.10790272720927 47.643733520889654, -114.10790518800322 47.641932716999108, -114.11325582699743 47.641929283002106))
Here's the code that creates the Polygon and adds it to the layer:
var newPolygon = new PolygonData(){};
foreach (var point in locations)
{
newPolygon.Points.Add(new Location(point .Latitude,
point .Longitude));
}
Layer.Items.Add(newPolygon);
And the data in the "locations" variable as WKT:
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2 Answers, 1 is accepted
0
Hi Michael,
I tried to use the provided data and to create a PolygonData object and to visualize it using the RadMap control and it seems that the polygon is visualized. I am not sure if this is the correct shape that you need to visualize.
However, you need to keep in mind that the RadMap works with the Mercator projection. Also known as EPSG:4326 and if your coordinates are extracted in different projection the visualized shape will not look as you might expect it. This is why I would ask you to double check if the provided coordinates are created using Mercator projection.
Regards,
Pavel R. Pavlov
Telerik
I tried to use the provided data and to create a PolygonData object and to visualize it using the RadMap control and it seems that the polygon is visualized. I am not sure if this is the correct shape that you need to visualize.
However, you need to keep in mind that the RadMap works with the Mercator projection. Also known as EPSG:4326 and if your coordinates are extracted in different projection the visualized shape will not look as you might expect it. This is why I would ask you to double check if the provided coordinates are created using Mercator projection.
Regards,
Pavel R. Pavlov
Telerik
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0
Ludmila
Top achievements
Rank 1
Rank 1
answered on 29 Aug 2014, 05:31 AM
Hello Michael,
The approach you use will not work. The PolygonData is a wrong class to show polygon with interior rings. It can't show complex shapes. You have to use PathData instead. Something like this:
By the way, the RadMap control has built-in support for the WKT/WKB format. Why you simple don't use? You can find example here. This example is for the InformationLayer, but similar functionality is available for VisualizationLayer as well.
Best Regards
Ludmila Murzova
The approach you use will not work. The PolygonData is a wrong class to show polygon with interior rings. It can't show complex shapes. You have to use PathData instead. Something like this:
PathData path = new PathData(){ ShapeFill = new MapShapeFill() { Fill = new SolidColorBrush(Color.FromArgb(127, 0, 240, 255)), Stroke = new SolidColorBrush(Colors.Red), StrokeThickness = 2 }};PathGeometryData geometry = new PathGeometryData();PathFigureData figure = new PathFigureData(){ IsClosed = true, StartPoint = new Location(42.6957539183824, 23.3327663758679)};LocationCollection points = new LocationCollection();points.Add(new Location(42.1429369264591, 24.7498095849434));points.Add(new Location(42.5131732087098, 27.4611884843576)); points.Add(new Location(43.2073941930888, 27.9275176988258));points.Add(new Location(43.1957539183824,23.5427663758679));PolyLineSegmentData segment = new PolyLineSegmentData(){ Points = points};figure.Segments.Add(segment);geometry.Figures.Add(figure);figure = new PathFigureData(){ IsClosed = true, StartPoint = new Location(42.6957539183824, 23.8327663758679)};points = new LocationCollection();points.Add(new Location(42.3429369264591, 24.7498095849434));points.Add(new Location(42.6131732087098, 26.9611884843576));points.Add(new Location(43.0073941930888, 27.3275176988258));points.Add(new Location(42.9957539183824, 23.9427663758679));segment = new PolyLineSegmentData(){ Points = points};figure.Segments.Add(segment);geometry.Figures.Add(figure);path.Data = geometry;this.visualizationLayer.Items.Add(path);By the way, the RadMap control has built-in support for the WKT/WKB format. Why you simple don't use? You can find example here. This example is for the InformationLayer, but similar functionality is available for VisualizationLayer as well.
Best Regards
Ludmila Murzova