NonSimpleReason Enumeration

In This Topic

Specifies the reason that a non-simple geometry is non-simple. Returned from GeometryEngine.GetNonSimpleReason. See SimplifyAsFeature and IsSimpleAsFeature Wiki page.

Syntax

C#
Visual Basic (Declaration)

public enum NonSimpleReason : System.Enum, System.IComparable, System.IConvertible, System.IFormattable, System.ISpanFormattable

Public Enum NonSimpleReason 
   Inherits System.Enum
   Implements System.IComparable, System.IConvertible, System.IFormattable, System.ISpanFormattable

Members

Member	Description
DiscontinuousParts	The geometry contains discontinuous parts.
DuplicateVertex	The geometry has one or more duplicate vertices.
EmptyPart	The geometry contains an empty part.
EmptyZValues	The geometry is z-aware, but one or more z-values are NaN.
IsSimple	The geometry is simple. Applies to all geometry types.
MismatchedAttributes	The geometry has mismatched attributes. All of the points must have the same attribute awareness. For example, if one point is z-aware and another point is not, then it has mismatched attributes.
RingOrientation	The rings of a polygon are oriented incorrectly. Exterior rings must be oriented clockwise, and interior rings must be oriented counterclockwise.
SegmentOrientation	Individual segments are not consistently oriented. The end point of segment(i) must be the same as the start point of segment(i + 1).
SelfIntersections	A path or ring intersects itself or other parts.
ShortSegments	Some segments are shorter than allowed by the system units of the spatial reference associated with the geometry.
UnclosedRing	A ring in a polygon is not closed. The end point of the last segment in a ring must be equal to the start point of the first segment in that ring.

Example

Get Non Simple Reason

SpatialReference sr = SpatialReferences.WGS84;
Coordinate2D[] coords = new Coordinate2D[] { new Coordinate2D(5, 10), new Coordinate2D(15, 20), new Coordinate2D(25, 10), new Coordinate2D(5, 20) };
Polyline polyline = PolylineBuilderEx.CreatePolyline(coords, sr);

NonSimpleReason nonSimpleReason;
bool isSimple = GeometryEngine.Instance.GetNonSimpleReason(polyline, out nonSimpleReason);
// isSimple = true;
// nonSimpleReason = NonSimpleReason.IsSimple


double resolution = sr.XYResolution;
coords = new Coordinate2D[] { new Coordinate2D(0, 0), new Coordinate2D(0, 1.8 * resolution), new Coordinate2D(10, 10), new Coordinate2D(0, 5) };
polyline = PolylineBuilderEx.CreatePolyline(coords, sr);

isSimple = GeometryEngine.Instance.GetNonSimpleReason(polyline, out nonSimpleReason);
// isSimple = false
// nonSimpleReason = NonSimpleReason.ShortSegments


coords = new Coordinate2D[] { new Coordinate2D(10, 10), new Coordinate2D(10, 20), new Coordinate2D(40, 20),
new Coordinate2D(40, 10), new Coordinate2D(60, 10), new Coordinate2D(70, 10)};

Polygon polygon = PolygonBuilderEx.CreatePolygon(coords, sr);

isSimple = GeometryEngine.Instance.GetNonSimpleReason(polygon, out nonSimpleReason);
//isSimple = false
//nonSimpleReason = NonSimpleReason.SelfIntersections

SimplifyOgc


SpatialReference sr = SpatialReferences.WGS84;

Coordinate2D[] coords = new Coordinate2D[] { new Coordinate2D(5, 10), new Coordinate2D(15, 20), new Coordinate2D(25, 10), new Coordinate2D(5, 20) };
Polyline polyline = PolylineBuilderEx.CreatePolyline(coords, sr);
// polyline.IsKnownSimpleOgc = false
// polyline.IsKnownSimple = false

NonSimpleReason nonSimpleReason;
bool isSimple = GeometryEngine.Instance.IsSimpleOgc(polyline, out nonSimpleReason, true);
// isSimple = false
// nonSimpleReason = NonSimpleReason.SelfIntersections

Polyline simplePolyline = GeometryEngine.Instance.SimplifyOgc(polyline) as Polyline;
// simplePolyline.IsKnownSimpleOgc = true
// simplePolyline.IsKnownSimple = true



double resolution = sr.XYResolution;
Coordinate3D[] coords3D = new Coordinate3D[] { new Coordinate3D(0, 0, 0), new Coordinate3D(0, 1.8 * resolution, 0.8 * sr.ZTolerance), new Coordinate3D(10, 10, 1),
  new Coordinate3D(0, 5, 1) };
polyline = PolylineBuilderEx.CreatePolyline(coords3D, sr);

isSimple = GeometryEngine.Instance.IsSimpleOgc(polyline, out nonSimpleReason);
// isSimple = false
// nonSimpleReason = NonSimpleReason.ShortSegments

simplePolyline = GeometryEngine.Instance.SimplifyOgc(polyline, true) as Polyline;
// simplePolyline.IsKnownSimpleOgc = true
// simplePolyline.IsKnownSimple = true



coords = new Coordinate2D[] { new Coordinate2D(0, 0), new Coordinate2D(0, 0) };
Multipoint multipoint = MultipointBuilderEx.CreateMultipoint(coords, sr);

isSimple = GeometryEngine.Instance.IsSimpleOgc(multipoint, out nonSimpleReason);
// isSimple = false
// nonSimpleReason = NonSimpleReason.DuplicateVertex

Inheritance Hierarchy

System.Object
   System.ValueType
      System.Enum
         ArcGIS.Core.Geometry.NonSimpleReason

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.2 or higher.

Reference

ArcGIS.Core.Geometry Namespace

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