dymaptic.GeoBlazor.Core
dymaptic.GeoBlazor.Core.Components.Geometries
Polygon Class
A polygon contains an array of rings and a spatialReference. ArcGIS Maps SDK for JavaScript
public class Polygon : dymaptic.GeoBlazor.Core.Components.Geometries.Geometry
Inheritance System.Object 🡒 Microsoft.AspNetCore.Components.ComponentBase 🡒 MapComponent 🡒 Geometry 🡒 Polygon
Derived
↳ Circle
Constructors
Polygon() Constructor
Parameterless constructor for use as a Razor Component.
public Polygon();
Polygon(IReadOnlyList, SpatialReference, Point, Nullable, Nullable) Constructor
Constructor for use in C# code. Use named parameters (e.g., item1: value1, item2: value2) to set properties in any order.
public Polygon(System.Collections.Generic.IReadOnlyList<dymaptic.GeoBlazor.Core.Model.MapPath> rings, dymaptic.GeoBlazor.Core.Components.SpatialReference? spatialReference=null, dymaptic.GeoBlazor.Core.Components.Geometries.Point? centroid=null, System.Nullable<bool> hasM=null, System.Nullable<bool> hasZ=null);
Parameters
rings System.Collections.Generic.IReadOnlyList<MapPath>
An array of rings. ArcGIS Maps SDK for JavaScript
spatialReference SpatialReference
The spatial reference of the geometry. default SpatialReference.WGS84 // wkid: 4326 ArcGIS Maps SDK for JavaScript
centroid Point
The centroid of the polygon. ArcGIS Maps SDK for JavaScript
hasM System.Nullable<System.Boolean>
Indicates if the geometry has M values. ArcGIS Maps SDK for JavaScript
hasZ System.Nullable<System.Boolean>
Indicates if the geometry has z-values (elevation). ArcGIS Maps SDK for JavaScript
Properties
Polygon.Centroid Property
The centroid of the polygon. ArcGIS Maps SDK for JavaScript
public dymaptic.GeoBlazor.Core.Components.Geometries.Point? Centroid { get; set; }
Property Value
Polygon.IsSelfIntersecting Property
Checks to see if polygon rings cross each other and indicates if the polygon is self-intersecting, which means the ring of the polygon crosses itself. ArcGIS Maps SDK for JavaScript
public System.Nullable<bool> IsSelfIntersecting { get; set; }
Property Value
System.Nullable<System.Boolean>
Polygon.IsSimple Property
Is Simple based on the ArcGIS simplify operator. Indicates if the given geometry is non-OGC topologically simple. This operation takes into account z-values. ArcGIS Maps SDK for JavaScript Polygon geometries are considered simple if the following is true:
- Contains no self-intersecting rings.
- Exterior rings are clockwise, and interior rings (holes) are counterclockwise.
- Rings can touch other rings in a finite number of points.
- Rings can be self-tangent in a finite number of points.
- Vertices are either exactly coincident, or further than the 2 * sqrt(2) * tolerance from each other.
- If a vertex is not equal to any boundary point of a segment, it has to be further than sqrt(2) * tolerance from any segment.
- No segment length is zero.
- Each path contains at least three non-equal vertices.
- No empty paths are allowed.
- Order of rings does not matter. The tolerance value is obtained from the geometry’s spatial reference. If it is null, then a small tolerance value is calculated from the geometry coordinates using double-precision.
public override System.Nullable<bool> IsSimple { get; }
Property Value
System.Nullable<System.Boolean>
Polygon.Rings Property
An array of MapPath rings.
public System.Collections.Generic.IReadOnlyList<dymaptic.GeoBlazor.Core.Model.MapPath> Rings { get; set; }
Property Value
System.Collections.Generic.IReadOnlyList<MapPath>
Polygon.Type Property
The Geometry “type”, used internally to render.
public override dymaptic.GeoBlazor.Core.Enums.GeometryType Type { get; }
Property Value
Methods
Polygon.AddRing(IReadOnlyCollection) Method
Adds a ring to the Polygon. ArcGIS Maps SDK for JavaScript
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Geometries.Polygon?> AddRing(System.Collections.Generic.IReadOnlyCollection<dymaptic.GeoBlazor.Core.Components.Geometries.Point> points);
Parameters
points System.Collections.Generic.IReadOnlyCollection<Point>
A polygon ring. The first and last coordinates/points in the ring must be the same. This can either be defined as an array of Point geometries or an array of XY coordinates.
Returns
System.Threading.Tasks.Task<Polygon>
Polygon.Clone() Method
Returns a deep clone of the geometry.
public dymaptic.GeoBlazor.Core.Components.Geometries.Polygon Clone();
Returns
Polygon.Contains(Point) Method
Checks on the client if the input point is inside the polygon. ArcGIS Maps SDK for JavaScript
public System.Threading.Tasks.Task<System.Nullable<bool>> Contains(dymaptic.GeoBlazor.Core.Components.Geometries.Point point);
Parameters
point Point
The point to test whether it is contained within the testing polygon.
Returns
System.Threading.Tasks.Task<System.Nullable<System.Boolean>>
Polygon.GetCentroid() Method
Asynchronously retrieve the current value of the Centroid property.
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Geometries.Point?> GetCentroid();
Returns
System.Threading.Tasks.Task<Point>
Polygon.GetPoint(int, int) Method
Returns a point specified by a ring and point in the path. param pointIndex The index of the desired point within the ring. ArcGIS Maps SDK for JavaScript
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Geometries.Point?> GetPoint(int ringIndex, int pointIndex);
Parameters
ringIndex System.Int32
The index of the ring containing the desired point.
pointIndex System.Int32
The index of the desired point within the ring.
Returns
System.Threading.Tasks.Task<Point>
Polygon.InsertPoint(int, int, Point) Method
Inserts a new point into the polygon. param pointIndex The index of the point to insert within the ring. ArcGIS Maps SDK for JavaScript
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Geometries.Polygon?> InsertPoint(int ringIndex, int pointIndex, dymaptic.GeoBlazor.Core.Components.Geometries.Point point);
Parameters
ringIndex System.Int32
The index of the ring in which to insert the point.
pointIndex System.Int32
The index of the point to insert within the ring.
point Point
The point to insert.
Returns
System.Threading.Tasks.Task<Polygon>
Polygon.IsClockwise(IReadOnlyCollection) Method
Checks if a Polygon ring is clockwise. ArcGIS Maps SDK for JavaScript
public System.Threading.Tasks.Task<System.Nullable<bool>> IsClockwise(System.Collections.Generic.IReadOnlyCollection<dymaptic.GeoBlazor.Core.Components.Geometries.Point> ring);
Parameters
ring System.Collections.Generic.IReadOnlyCollection<Point>
A polygon ring. It can either be defined as an array of Point geometries or an array of XY coordinates.
Returns
System.Threading.Tasks.Task<System.Nullable<System.Boolean>>
Polygon.RemovePoint(int, int) Method
Removes a point from the polygon at the given `pointIndex` within the ring identified by `ringIndex`. param pointIndex The index of the point to remove within the ring. ArcGIS Maps SDK for JavaScript
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Geometries.Point?> RemovePoint(int ringIndex, int pointIndex);
Parameters
ringIndex System.Int32
The index of the ring containing the point to remove.
pointIndex System.Int32
The index of the point to remove within the ring.
Returns
System.Threading.Tasks.Task<Point>
Polygon.RemoveRing(int) Method
Removes a ring from the Polygon. ArcGIS Maps SDK for JavaScript
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Geometries.Point[]?> RemoveRing(int index);
Parameters
index System.Int32
The index of the ring to remove.
Returns
System.Threading.Tasks.Task<Point[]>
Polygon.SetPoint(int, int, Point) Method
Updates a point in the polygon. param pointIndex The index of the point to update within the ring. ArcGIS Maps SDK for JavaScript
public System.Threading.Tasks.Task<dymaptic.GeoBlazor.Core.Components.Geometries.Polygon?> SetPoint(int ringIndex, int pointIndex, dymaptic.GeoBlazor.Core.Components.Geometries.Point point);
Parameters
ringIndex System.Int32
The index of the ring containing the point to update.
pointIndex System.Int32
The index of the point to update within the ring.
point Point
The new point geometry.