ArcObjects Point Within Polygon – How to Determine if a Point Exists Within a Polygon

arcgis-enginearcobjects

Does anyone know a function to determine if a Point exists within a polygon?

Edit: I'm using C# with ArcEngine10.

Best Answer

Take a look at the IRelationalOperator2 you can cast your polygon to that Interface and use the contains method.

Related Solutions

ArcGIS – How to Determine If a Point Lies on a Polyline

There's probably an easier way to do it but this is what I do.

//layer is what layer you are checking
ESRI.ArcGIS.Carto.IIdentify identify1 = layer as IIdentify; 

//idGeo is IGeometry you want to query -in your case a point, but I'm using a square here    
IArray array = identify1.Identify(idGeo);  

if (array != null)
{
    object obj = array.get_Element(0);
    IFeatureIdentifyObj fobj = obj as IFeatureIdentifyObj;
    IRowIdentifyObject irow = fobj as IRowIdentifyObject;
    IFeature feature = irow.Row as IFeature;
    IGeometry geometry1 = feature.Shape;
    IPointCollection pc = geometry1 as IPointCollection;
    if(pc != null && pc.PointCount > 0) //then its a polyline
}

Arc Engine – How to Determine if a Point Lies Within a Polyline in ArcGIS

Use IRelationalOperator, either touches or not disjoint.

Best Answer

Related Solutions

ArcGIS – How to Determine If a Point Lies on a Polyline

Arc Engine – How to Determine if a Point Lies Within a Polyline in ArcGIS

Related Question