I've got some custom shapefiles that contain very basic polygons in them, and when I load the shapefiles I want to be able to make each polygon a different color. For example, in one shapefile I have three concentric circles, and I want the largest one to be red, the middle one to be blue, and the smallest one to be green.
I can read from the .shp and get three features, but then I'm not sure what to do with the 'Feature' objects that I have to get them to display(and with different colors).
Hello Ryan,
You can try use QualityFamilyAreaStyle to make this, QualityFamilyAreaStyle is expected to use a whole bunch of QualityFamilyColor to render a Area type features. For example, I have 5 quality family colors to render 251 features, then
Feature1----using QualityFamilyColor one
Feature2----using QualityFamilyColor two
Feature3----using QualityFamilyColor three
Etc in turn.
Here is a sample for this, you can have a try:
private void WpfMap_Loaded(object sender, RoutedEventArgs e)
{
Map1.MapUnit = GeographyUnit.DecimalDegree;
Map1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean);
ShapeFileFeatureLayer worldLayer = new ShapeFileFeatureLayer(@"..\..\SampleData\Data\Countries02.shp");
worldLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = new QualityFamilyAreaStyle(new GeoPen(GeoColor.StandardColors.Gray), GeoColor.SimpleColors.PaleBlue, 15);
worldLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
LayerOverlay worldOverlay = new LayerOverlay();
worldOverlay.Layers.Add("WorldLayer", worldLayer);
Map1.Overlays.Add("StaticOverlay", worldOverlay);
Map1.CurrentExtent = new RectangleShape(-143.4, 109.3, 116.7, -76.3);
Map1.Refresh();
}
Regards,
Gary
Ryan,
Reading your description, I think that what you need is a Style that is going to color the polygons based on its size. For doing that I would suggest you create a custom Style inheriting fromn Areastyle and in the overwritten DrawCore function, you write the logic to have the feature displayed with a color based on the size of its polygon. I don't know if you have the size of the polygon based on a column or based on the surface area of the polygon, but you can write yourself the logic for that.
As a good example for creating such a custom style, I recommend the sample Sized Point Style of the Code Community wiki.thinkgeo.com/wiki/Map_Suite_Wp...oint_Style. It is about creating a custom Point Style which size is proportional to some value of a column. I think that the code you will find in this sample will be good help to get you started.