No features returned from SceneLayer query

DominicBowyer2

Hi there, I have the following function that aims to extract meshes from a scene layer passed in as a parameter. However, for reasons unknown to me. The number of features returned is consistently 0. Would appreciate any help understanding what it is that I am doing wrong. I will share the function below as well as an portion of my logs for context:

func extractMeshes(from sceneLayer: ArcGISSceneLayer) async {

      guard let featureTable = sceneLayer.featureTable else {

          print("No feature table found in the scene layer")

          return

      }

 

      print("Feature table found: \(featureTable.tableName)")

 

      // Ensure the layer is loaded

      if sceneLayer.loadStatus != .loaded {

          do {

              try await sceneLayer.load()

              print("Scene layer loaded: \(sceneLayer.name)")

          } catch {

              print("Error loading scene layer: \(error)")

              return

          }

      }

 

      // Print the fields of the feature table

      let fields = featureTable.fields

      print("Feature table fields: \(fields.map { $0.name })")

 

      // Adjust the query parameters

      let query = QueryParameters()

      query.whereClause = "1=1"

      query.returnsGeometry = true

 

      print("Query parameters set: \(query.whereClause)")

 

      do {

          let featureQueryResult = try await featureTable.queryFeatures(using: query)

          let features = featureQueryResult.features()

          let featuresArray = Array(features)

          print("Number of features queried: \(featuresArray.count)")

          

          for feature in featuresArray {

              if let geometry = feature.geometry {

                  print("Extracted geometry from feature: \(geometry)")

                  if let node = createNode(for: geometry) {

                      let point = geometry.extent.center

                    print("Anchoring node at coordinate: (\(point.y), \(point.x)) with altitude \(String(describing: point.z))")

                      anchorNode(node, at: point)

                  }

              }

          }

      } catch {

          print("Error querying features: \(error)")

      }

  }

Logs:

MSPK loaded successfully.

Attempting to load scene: ArcGIS.Scene

Layer name: London GPS test

Layer name: 3D_tests_Multipatch_as_Mesh

Feature table found: SceneLayerFeatures

Feature table fields: ["OBJECTID", "speckle_id"]

Query parameters set: 1=1

Number of features queried: 0

NimeshJarecha

Hi @DominicBowyer2 ,

Thanks for providing your code. I cannot compile it but looks like the feature table loading step is missing. I would suggest altering the steps of the function as,

1. Load scene layer if not loaded

2. Get the feature table from scene layer

3. Load the feature table

4. Query the feature table.

 

    func extractMeshes(from sceneLayer: ArcGISSceneLayer) async {
        // Ensure the layer is loaded
        if sceneLayer.loadStatus != .loaded {
            do {
                try await sceneLayer.load()
                print("Scene layer loaded: \(sceneLayer.name)")
            } catch {
                print("Error loading scene layer: \(error)")
                return
            }
        }
        
        guard let featureTable = sceneLayer.featureTable else {
            print("No feature table found in the scene layer")
            return
        }
        
        print("Feature table found: \(featureTable.tableName)")
        
        // Ensure the table is loaded
        if featureTable.loadStatus != .loaded {
            do {
                try await featureTable.load()
                print("Feature table loaded: \(featureTable.tableName)")
            } catch {
                print("Error loading feature table: \(error)")
                return
            }
        }

        
        // Print the fields of the feature table
        let fields = featureTable.fields
        print("Feature table fields: \(fields.map { $0.name })")
        
        // Adjust the query parameters
        let query = QueryParameters()
        query.whereClause = "1=1"
        query.returnsGeometry = true
        
        print("Query parameters set: \(query.whereClause)")
        
        do {
            let featureQueryResult = try await featureTable.queryFeatures(using: query)
            let features = featureQueryResult.features()
            let featuresArray = Array(features)
            print("Number of features queried: \(featuresArray.count)")
            
            for feature in featuresArray {
                if let geometry = feature.geometry {
                    print("Extracted geometry from feature: \(geometry)")
                    if let node = createNode(for: geometry) {
                        let point = geometry.extent.center
                        print("Anchoring node at coordinate: (\(point.y), \(point.x)) with altitude \(String(describing: point.z))")
                        anchorNode(node, at: point)
                    }
                }
            }
        } catch {
            print("Error querying features: \(error)")
        }
    }

Regards,

Nimesh