topic Re: What kind of query does queryFeatures support? in ArcGIS JavaScript Maps SDK Questions

What kind of query does queryFeatures support?

DavidSchontzler — Sun, 12 Dec 2021 07:06:39 GMT

I am attempting to query some FeatureLayers, but I cannot seem to construct a query that works.

If you click on the map in the following demo the promise returns an error: ArcGIS: queryFeatures - Unsupported query error

message: "Unsupported query"
name: "esri.layers.graphics.QueryEngine"

I've tried a number of searches with different geometry types (extent, circle, geodesic buffer). I've also tried center and distance, but they are all unsupported.

Question: how can I find out what kinds of queries FeatureLayers support? I have not come across docs that have helped in that regard. Besides my sample FeatureLayer there are other FeatureLayers I will be querying (e.g. remote ones) and I would like to figure out what I can and cannot send in a query.

FYI, here is the code:

    require([
      "esri/Map",
      "esri/views/MapView",
      "esri/layers/FeatureLayer",
      "esri/geometry/geometryEngine",
      "esri/Graphic",
      "esri/layers/GraphicsLayer",
      "esri/tasks/support/Query",
      "esri/widgets/CoordinateConversion",
      "esri/geometry/support/webMercatorUtils",
      "esri/geometry/Point",
      "dojo/domReady!"
    ], function(Map, MapView, FeatureLayer, geometryEngine, Graphic, GraphicsLayer, Query, CC, wMU, Point) {

      map = new Map({
        basemap: "topo-vector"
      });
      
      view = new MapView({
        container: "viewDiv",
        map: map,
        center: [-118.739851, 34.090456],
        zoom: 14
      });
      
      view.ui.add(new CC({ view: view }), 'bottom-right');
      
      featureLayer = new FeatureLayer({
        id: 'dots',
        title: 'dots on a map',
        geometryType: 'point',
        objectIdField: 'id',
        spatialReference: { wkid: 4326 },
        source: [],
        fields: [
          {
            name: 'id',
            alias: 'ID',
            type: 'oid',
          },
          {
            name: 'mapObject',
            alias: 'mapObject',
            type: 'object'
          }
        ]
      });
      
      map.layers.add(featureLayer);
      
      var circleGraphic;
      
      points = [];
      
      [
        '-118.742555, 34.095076',
        '-118.747447, 34.094010',
        '-118.749593, 34.090811',
        '-118.734658, 34.088039',
        '-118.736032, 34.091735',
        '-118.743070, 34.091096'
      ].forEach(pair => {
        var ll = pair.split(', ');
        addPoint(new Point({
          type: 'point',
          spatialReference: { wkid: 4326 },
          x: ll[0],
          y: ll[1]
        }));
      });
      
      view.on('click', function (e) {
        var centerPt = e.mapPoint;
        if (e.native.ctrlKey) {
          // add more points to the map
          addPoint(centerPt);
        } else {
          // search in the clicked area for points
          var geom = geometryEngine.geodesicBuffer(centerPt, 400, 'meters');
          if (circleGraphic) view.graphics.remove(circleGraphic);
          circleGraphic = new Graphic({
            geometry: geom,
            symbol: {
              type: 'simple-fill',
              color: [140, 140, 222, 0.5]
            }
          });
          view.graphics.add(circleGraphic);
          
          query = featureLayer.createQuery();
          query.geometry = geom;
          query.spatialRelationship = 'contains';
          
          featureLayer.queryFeatures(query)
            .then(result => {
              console.log('This area contains', inPts.length, 'points');
            }).catch(error => {
              console.error(error);
            });
        }
      });
      
      function addPoint(geo) {
        if (geo.spatialReference.isGeographic) {
          geo = wMU.geographicToWebMercator(geo);
          console.log('converting geography');
        }
        var pt = new Graphic({
          geometry: geo,
          symbol: {
            type: 'simple-marker',
            style: 'circle',
            color: 'black',
            size: '8px'
          }
        });
        // console.log('adding point at:', pt.geometry.x, pt.geometry.y);
        view.graphics.add(pt);
        points.push(pt);
      }
    });‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: What kind of query does queryFeatures support?

DavidSchontzler — Wed, 26 Dec 2018 23:43:29 GMT

I attempted to use FeatureLayerView.queryFeatures(), but the result is the same:

ArcGIS: queryFeatures - Unsupported query error - FeatureLayerView

A partial response to my original question is that layer.capabilities.query should tell you what kind of queries you can make. I my case, featureLayer.capabilities.query.supportsExtent = true, but the error still persists when I use FeatureLayerView and pass an Extent for the geometry.

Re: What kind of query does queryFeatures support?

RobertScheitlin__GISP — Sun, 12 Dec 2021 07:06:43 GMT

David,

The issue you were having was you were adding the points to the view graphics and never the FeatureLayer, and several other issues. Here is the corrected code:

<html>

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
  <title>ArcGIS DevLabs: JavaScript Starter App</title>
  <style>
    html,
    body,
    #viewDiv {
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
    }
  </style>

  <link rel="stylesheet" href="https://js.arcgis.com/4.10/esri/css/main.css">
  <script src="https://js.arcgis.com/4.10/"></script>

  <script>
    require([
      "esri/Map",
      "esri/views/MapView",
      "esri/layers/FeatureLayer",
      "esri/geometry/geometryEngine",
      "esri/Graphic",
      "esri/layers/GraphicsLayer",
      "esri/tasks/support/Query",
      "esri/widgets/CoordinateConversion",
      "esri/geometry/support/webMercatorUtils",
      "esri/geometry/Point",
      "dojo/domReady!"
    ], function(Map, MapView, FeatureLayer, geometryEngine, Graphic, GraphicsLayer, Query, CC, wMU, Point) {

      map = new Map({
        basemap: "topo-vector"
      });

      view = new MapView({
        container: "viewDiv",
        map: map,
        center: [-118.739851, 34.090456],
        zoom: 14
      });

      view.ui.add(new CC({
        view: view
      }), 'bottom-right');

      featureLayer = new FeatureLayer({
        id: 'dots',
        title: 'dots on a map',
        geometryType: 'point',
        objectIdField: 'id',
        spatialReference: {
          wkid: 4326
        },
        source: [],
        fields: [{
            name: 'id',
            alias: 'ID',
            type: 'oid',
          },
          {
            name: 'origin',
            alias: 'Origin',
            type: 'string'
          }
        ],
        renderer: {
          type: "simple", // autocasts as new SimpleRenderer()
          symbol: {
            type: "simple-marker", // autocasts as new SimpleMarkerSymbol()
            size: 6,
            color: "black",
            outline: { // autocasts as new SimpleLineSymbol()
              width: 0.5,
              color: "white"
            }
          }
        }
      });

      map.layers.add(featureLayer);

      var circleGraphic;

      points = [];

      [
        '-118.742555, 34.095076',
        '-118.747447, 34.094010',
        '-118.749593, 34.090811',
        '-118.734658, 34.088039',
        '-118.736032, 34.091735',
        '-118.743070, 34.091096'
      ].forEach(pair => {
        var ll = pair.split(', ');
        addPoint(new Point({
          type: 'point',
          spatialReference: {
            wkid: 4326
          },
          x: ll[0],
          y: ll[1]
        }), "original");
      });

      view.on('click', function(e) {
        var centerPt = e.mapPoint;
        if (e.native.ctrlKey) {
          // add more points to the map
          addPoint(centerPt, "user_added");
        } else {
          // search in the clicked area for points
          var geom = geometryEngine.geodesicBuffer(centerPt, 400, 'meters');
          if (circleGraphic) view.graphics.remove(circleGraphic);
          circleGraphic = new Graphic({
            geometry: geom,
            symbol: {
              type: 'simple-fill',
              color: [140, 140, 222, 0.5]
            }
          });
          view.graphics.add(circleGraphic);

          query = featureLayer.createQuery();
          query.geometry = wMU.webMercatorToGeographic(geom);
          query.spatialRelationship = "intersects"; // this is the default
          query.returnGeometry = true;
          query.outFields = ["*"];
          query.outSpatialReference = view.spatialReference;

          featureLayer.queryFeatures(query)
            .then(result => {
              console.info(result);
              console.log('This area contains', result.features.length, 'points');
            }).catch(error => {
              console.error(error);
            });
        }
      });

      function addPoint(geo, source) {
        if (geo.spatialReference.isWebMercator) {
          geo = wMU.webMercatorToGeographic(geo);
          console.info("Converting to Geographic");
        }
        var pt = new Graphic({
          geometry: geo,
          attributes: {
            origin: source
          }
        });
        points.push(pt);
        featureLayer.applyEdits({
          addFeatures: [pt]
        })
      }
    });
  </script>
</head>

<body>
  <div id="viewDiv"></div>
</body>

</html>
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Re: What kind of query does queryFeatures support?

DavidSchontzler — Thu, 27 Dec 2018 01:36:19 GMT

Thank you for the reply. That worked! I made the mistake of forking an old CodePen which was not adding the items to the feature layer.

My original issue was that the query was not supported. I assume that is because I did not convert the geometry to a geographic one.

Once the query was correct, I still would not receive any result if applyEdits is not used, correct? Should I be checking something like layer.capabilities.editing.supportsEditing before attempting to use applyEdits?

I received the following warning:

"[esri.layers.FeatureLayer]" "FeatureLayer.hasAttachments is deprecated. Use FeatureLayer.capabilities.data.supportsAttachment instead."

That is never called explicitly in the code. Is that something that Esri just has not updated internally?

Re: What kind of query does queryFeatures support?

RobertScheitlin__GISP — Sun, 12 Dec 2021 07:06:45 GMT

Once the query was correct, I still would not receive any result if applyEdits is not used, correct?

No. I was able to get results for the points in the buffer using this instead of applyEdits:

      function addPoint(geo, source) {
        if (geo.spatialReference.isWebMercator) {
          geo = wMU.webMercatorToGeographic(geo);
          console.info("Converting to Geographic");
        }
        var pt = new Graphic({
          geometry: geo,
          attributes: {
            origin: source
          }
        });
        points.push(pt);
        featureLayer.source = points;
      }‍‍‍‍‍‍‍‍‍‍‍‍‍‍

I just could not get the user added points to display unless I used applyEdits.

Should I be checking something like layer.capabilities.editing.supportsEditing before attempting to use applyEdits?

If you are creating the FeatureLayer client side using a collection of graphics then No that step is not needed.

I do not receive the

"[esri.layers.FeatureLayer]" "FeatureLayer.hasAttachments is deprecated. Use FeatureLayer.capabilities.data.supportsAttachment instead."

warning in my code?...

Re: What kind of query does queryFeatures support?

DavidSchontzler — Fri, 28 Dec 2018 17:47:20 GMT

I'll experiment with applyEdits in my actual code to see when it's needed.

Is there some documentation on when and where geometry conversion is needed? e.g.

query.geometry = wMU.webMercatorToGeographic(geom)

Re: What kind of query does queryFeatures support?

RobertScheitlin__GISP — Fri, 28 Dec 2018 17:57:41 GMT

David,

Any time you are comparing (doing a spatial query) the geometries have to be in the same spatial reference.

Re: What kind of query does queryFeatures support?

DavidSchontzler — Fri, 28 Dec 2018 23:20:02 GMT

Makes sense. In my particular app I am using wkid 102100. When I convert the plotted points to that spatial reference the query fails again. I am no longer converting the geodesic buffer because my featureLayer and the buffer are both using wkid 102100.

CodePen: ArcGIS: queryFeatures - Unsupported query error - 3 wkid 102100

I also came across this: GitHub - Esri/terraformer-arcgis-parser. I don't know if that would be a help in the case where I'm using wkid 102100.

Thank you for all of your help.

Re: What kind of query does queryFeatures support?

RobertScheitlin__GISP — Sun, 12 Dec 2021 07:06:48 GMT

David,

There is no need for terraformer. Your code just need to be tweaked:

<html>

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
  <title>ArcGIS DevLabs: JavaScript Starter App</title>
  <style>
    html,
    body,
    #viewDiv {
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
    }
  </style>

  <link rel="stylesheet" href="https://js.arcgis.com/4.10/esri/css/main.css">
  <script src="https://js.arcgis.com/4.10/"></script>

  <script>
    require([
      "esri/Map",
      "esri/views/MapView",
      "esri/layers/FeatureLayer",
      "esri/geometry/geometryEngine",
      "esri/Graphic",
      "esri/layers/GraphicsLayer",
      "esri/tasks/support/Query",
      "esri/widgets/CoordinateConversion",
      "esri/geometry/support/webMercatorUtils",
      "esri/geometry/Point",
      "dojo/domReady!"
    ], function(Map, MapView, FeatureLayer, geometryEngine, Graphic, GraphicsLayer, Query, CC, wMU, Point) {

      map = new Map({
        basemap: "streets"
      });

      view = new MapView({
        container: "viewDiv",
        map: map,
        center: [-118.739851, 34.090456],
        zoom: 14
      });

      view.ui.add(new CC({
        view: view
      }), 'bottom-right');

      featureLayer = new FeatureLayer({
        id: 'dots',
        title: 'dots on a map',
        geometryType: 'point',
        objectIdField: 'id',
        spatialReference: {
          wkid: 102100
        },
        source: [],
        fields: [{
            name: 'id',
            alias: 'ID',
            type: 'oid',
          },
          {
            name: 'origin',
            alias: 'Origin',
            type: 'string'
          }
        ],
        renderer: {
          type: "simple", // autocasts as new SimpleRenderer()
          symbol: {
            type: "simple-marker", // autocasts as new SimpleMarkerSymbol()
            size: 6,
            color: "black",
            outline: { // autocasts as new SimpleLineSymbol()
              width: 0.5,
              color: "white"
            }
          }
        }
      });

      map.layers.add(featureLayer);

      var circleGraphic;

      points = []; // for reference

      function addPoint(geo, source) {
        console.log('adding point', geo.x, geo.y, source);
        var pt = new Graphic({
          geometry: geo,
          attributes: {
            origin: source
          }
        });
        points.push(pt);
        //featureLayer.source.add(pt);
        //dojo.js:310 [esri.layers.graphics.sources.MemorySource] Source modifications will not propagate after layer has been loaded. Please use .applyEdits() instead
        featureLayer.applyEdits({
          addFeatures: [pt]
        })
      }

      var wkPts = [
        '-13217438.998, 4041250.727',
        '-13217610.981, 4041059.635',
        '-13217945.393, 4041050.080',
        '-13217878.511, 4041403.601',
        '-13218413.570, 4040572.348',
        '-13218002.721, 4040409.920'
      ];

      wkPts.forEach(pair => {
        var xy = pair.split(', ');
        addPoint(new Point({
          spatialReference: featureLayer.spatialReference,
          x: xy[0],
          y: xy[1]
        }), "original");
      });

      view.on('click', function(e) {
        var centerPt = e.mapPoint;
        if (e.native.ctrlKey) {
          // add more points to the map
          addPoint(centerPt, "user_added");
        } else {
          // search in the clicked area for points
          var geom = geometryEngine.geodesicBuffer(centerPt, 400, 'meters');
          if (circleGraphic) view.graphics.remove(circleGraphic);
          circleGraphic = new Graphic({
            geometry: geom,
            symbol: {
              type: 'simple-fill',
              color: [140, 140, 222, 0.5]
            }
          });
          view.graphics.add(circleGraphic);

          query = featureLayer.createQuery();
          query.geometry = geom;
          query.spatialRelationship = "intersects";
          query.returnGeometry = true;
          query.outFields = ["*"];
          query.outSpatialReference = view.spatialReference;

          featureLayer.queryFeatures(query)
            .then(result => {
              // console.info(result);
              console.log('This area contains', result.features.length, 'points');
            }).catch(error => {
              console.error(error);
            });
        }
      });
    });
  </script>
</head>

<body>
  <div id="viewDiv"></div>
</body>

</html>
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Re: What kind of query does queryFeatures support?

DavidSchontzler — Mon, 31 Dec 2018 17:40:14 GMT

Robert,

Thank you for the reply. We are currently using ArcGIS 4.8 and cannot upgrade to 4.10 yet, so I tried changing from 4.10 to 4.8 and it stopped working. Interestingly, applyEdits didn't add the points in 4.8, but source = points did work. But the query still returns an error. I wonder if there's a bug in 4.8?

CodePen sample of your suggestion in 4.8 using source = points: ArcGIS: queryFeatures - Unsupported query error - 4 wkid 102100

Edit: A quick comparison of featureLayer.capabilities.query in 4.10 and 4.8 show that 4.8 only has supportExtent = true, whereas 4.10 has a more supported queries. I've edited the example to use an extent instead of a geodesic buffer, but the error persists. I've confirmed that both the query and the featureLayer have the same spatialReference.wkid as well.

Re: What kind of query does queryFeatures support?

RobertScheitlin__GISP — Tue, 01 Jan 2019 19:48:03 GMT

David,

I guess you will have to wait until you can move to 4.10.

Re: What kind of query does queryFeatures support?

DavidSchontzler — Wed, 02 Jan 2019 17:44:42 GMT

I was afraid of that! Thank you for all your help. Yet another reason to upgrade to 4.10.