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find features in all layers around a point feature

DavidXavier

Hi,
How can I find features in all layers around a point feature.Currently i can able to identify single layer.

Suggestion appreciated.!!

Thank in advance

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DavidXavier

yes kyanuk1. Need what are all the point layers available inside the buffer.

Thanks..

KevinYanuk

Thanks for your effect kyanuk1.
Ur searching layer level but its better feature level...
For example I am having 20 layers but point intersecting 2 or 3 layer ..so I need point intersecting objects

Not sure I understand... do you want to find all features intersecting an area (buffer) around a single point? From specific layers?

DavidXavier

Thanks for your effect kyanuk1.
Ur searching layer level but its better feature level...
For example I am having 20 layers but point intersecting 2 or 3 layer ..so I need point intersecting objects

KevinYanuk

Thanks for your reply....

Your searching Single feature layer.. I need to find intersecting features(all layers features) around a point feature.

So use that method when iterating a list of IFeatureLayers from the map:

if you want to get the layers in a map:


List<IFeatureLayer> myLayers = new List<IFeatureLayer>();
var layerUID = new UID();
layerUID.Value = "{40A9E885-5533-11D0-98BE-00805F7CED21}";
var eLayer = _ArcMap.Document.FocusMap.get_Layers(layerUID, true);
var layer = eLayer.Next();
while (layer != null)
{
     var featureLayer = (IFeatureLayer)layer;
     myLayers.Add(featureLayer);
     layer = eLayer.Next();
}

then use the method I posted before on this list on your feature:


List<IFeature> intersectedFeatures = null;
foreach(var featureLayer in myList)
{
     intersectedFeatures.AddRange(myFeature.SelectByGeometry(featureLayer, 10)); // 10 is an arbitrary buffer size.. you would use whatever you want here
}

DavidXavier

Thanks for your reply....

Your searching Single feature layer.. I need to find intersecting features(all layers features) around a point feature.

KevinYanuk

Thanks for your Reply....

I tired but it select only one feature. please send any sample code...

If I'm understanding you correctly, you could use a SpatialFilter with a search distance to get all intersecting features from that point, i.e.:


       public static List<IFeature> SelectByGeometry(this IFeature feature, IFeatureLayer fc, double searchDist) {
            IFeatureCursor curs = null;
            List<IFeature> features = new List<IFeature>();
            
            try {
                SpatialFilter sf = new SpatialFilterClass();
                sf.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;

                ITopologicalOperator top = (ITopologicalOperator)feature.ShapeCopy;
                sf.Geometry = top.Buffer(Convert.ToDouble(searchDist));
                
                curs = fc.Search(sf, false);
                var boundFeat = curs.NextFeature();
                while (boundFeat != null)
                {
                    features.Add(boundFeat);
                    boundFeat = curs.NextFeature();
                }
                return features;
            }
            finally
            {
                if (curs != null) Marshal.ReleaseComObject(curs);
            }
        }

NeilClemmons_GISinc

Have you read the documentation for the method?

DavidXavier

Thanks for your Reply....

I tired but it select only one feature. please send any sample code...

NeilClemmons_GISinc

Call IMap.SelectByShape. It will query all feature layers in the map using the geometry you give it.

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