topic Re: Identify task returns duplicates in ArcGIS JavaScript Maps SDK Questions

Identify task returns duplicates

AlexGole — Sat, 11 Dec 2021 10:21:39 GMT

Hi all, I encountering a problem I have never had to deal with before. I am trying to use the identify widget to return attributes from multiple layers when clicked on. The issue is that it sometimes returns duplicates. Not sure why.

Here is my code:

1) The Identify params are called in the map.on load

map.on("load", function () {
                                 //coordinates on load


                                 map.on("mouse-move", showCoordinates);
                                 map.on("mouse-drag", showCoordinates);
                                 map.on("extent-change", showScale);




                                 //Show coordinates in bottom left corner of map
                                 function showCoordinates(evt) {
                                     //the map is in web mercator but display coordinates in geographic (lat, long)
                                     var mp = webMercatorUtils.webMercatorToGeographic(evt.mapPoint);
                                     //display mouse coordinates
                                     dom.byId("info").innerHTML = 'X, Y: ' + mp.x.toFixed(3) + ", " + mp.y.toFixed(3);
                                 }
                                 function showScale() {
                                     var currentScale = map.getScale();
                                     dom.byId("scaleVis").innerHTML = 'Scale 1:' + currentScale.toFixed(0);
                                 }
                                 var currentScale = map.getScale();
                                 dom.byId("scaleVis").innerHTML = 'Scale 1:' + currentScale.toFixed(0);
                                 var visible = [];
                             




                                 dynaLayer1.on('visible-layers-change', function (e, index) {
                                     visible.length = 0;
                                     console.log('The layer(s) changed: ', e.visibleLayers.join(', '));
                                     visible.push(e.visibleLayers)
                                 });
                                 //create identify tasks and setup parameters
                                 identifyTask = new IdentifyTask(dynaLayer1.url);


                                 identifyParams = new IdentifyParameters();
                                 identifyParams.tolerance = 3;
                                 identifyParams.returnGeometry = true;
                                 identifyParams.layerIds = visible;
                                 identifyParams.layerOption = IdentifyParameters.LAYER_OPTION_VISIBLE;
                                 identifyParams.width = map.width;
                                 identifyParams.height = map.height;




                                 //Create Home button
                                 initialExtent = map.extent;
                                 dojo.create("div", {
                                     className: "esriSimpleSliderHomeButton",
                                     title: 'Zoom to Full Extent',
                                     onclick: function () {
                                         if (initialExtent === undefined) {
                                             initialExtent = map.extent;
                                         }
                                         map.setExtent(initialExtent);
                                     }
                                 }, dojo.query(".esriSimpleSliderIncrementButton")[0], "after");




                                 var GraphicsTHP = new GraphicsLayer();
                                 GraphicsTHP.id = 'graphicsTHP';


                                 // Add the graphic and Layers here


                                 map.addLayers([dynaLayer2, dynaLayer1, GraphicsTHP]);
                                 dynaLayer2.hide();


                             });//End of on load stuff here

2) My function that executes the identify

  function executeIdentifyTask(event) {
                             $("#dialog").dialog("close");
                             identifyParams.geometry = event.mapPoint;
                             identifyParams.mapExtent = map.extent;
                             var deferred = identifyTask
                               .execute(identifyParams)
                               .addCallback(function (response) {
                                   // response is an array of identify result objects
                                   // Let's return an array of features.
                                   return arrayUtils.map(response, function (result, index) {
                                       var feature = result.feature;
                                       var layerName = result.layerName;


                                       feature.attributes.layerName = layerName;
                                       if (layerName === 'Timber Harvest Plans') {
                                           var THPs1 = new InfoTemplate("Timber Harvest Plans",
                                             "<b>County: </b>${County}<br/>" +
                                               "<b>HarvestDoc_Num: </b>${HarvestDoc_Num}<br/>" +
                                               "<b>Silviculture: </b>${Silviculture}<br/>" +
                                               "<b>Silviculture2: </b>${Silviculture2}<br/>" +
                                               "<b>HarvestDoc_Num: </b>${HarvestDoc_Num}<br/>" +
                                               "<b>Yarding: </b>${Yarding}<br/>" +
                                               "<b>Status_of_Plan: </b>${Status_of_Plan}<br/>" +
                                               "<b>Timber_Owner: </b>${Timber_Owner}<br/>" +
                                               "<b>Landowner: </b>${Landowner}<br/>" +
                                               "<b>Acres: </b>${Acres}<br/>"
                                               );
                                           feature.setInfoTemplate(THPs1);
                                       }
                                       else if (layerName === 'Public Land Survey System - Township, Range, & Section') {


                                           var test = new InfoTemplate("PLSS",
                                             "<b>SECTION: </b>${SECTION}<br/>" +
                                               "<b>MERIDIAN: </b>${CDFPWSNAME}<br/>" +
                                               "<b>TOWNSHIP: </b>${TOWNSHIP}<br/>" +
                                               "<b>RANGE: </b>${RANGE}<br/>" +
                                               "<b>MERIDIAN: </b>${MERIDIAN}<br/>"
                                                );
                                           feature.setInfoTemplate(test);
                                       }
                                       else if (layerName === 'Emergency Notices (King Fire, 2014)') {


                                           var THPs2 = new InfoTemplate("Emergency Notices",
                                             "<b>Acres: </b>${Acres}<br/>" +
                                               "<b>OWNER: </b>${OWNER}<br/>" +
                                               "<b>STATUS: </b>${STATUS}<br/>" +
                                               "<b>EMERGENCYNUM: </b>${EMERGENCYNUM}<br/>" +
                                               "<b>Treatment: </b>${Treatment}<br/>"
                                               );
                                           feature.setInfoTemplate(THPs2);
                                       }


                                       else if (layerName === 'Coastal Anadromy Zone (NOAA NMFS)') {


                                           var NOAA = new InfoTemplate("Coastal Anadromy Zone",
                                             "<b>Area Type: </b>${Area Type}<br/>");
                                           feature.setInfoTemplate(NOAA);
                                       }
                                       else if (layerName === 'Calwater - Planning Watersheds') {


                                           var Calwater = new InfoTemplate("Planning Watersheds",
                                             "<b>CALWNUM: </b>${CALWNUM}<br/>" +
                                               "<b>CDFPWSNAME: </b>${CDFPWSNAME}<br/>" +
                                               "<b>Coho_ESU_Status: </b>${Coho_ESU_Status}<br/>" +
                                               "<b>Chinook_ESU_Status: </b>${Chinook_ESU_Status}<br/>" +
                                               "<b>Steelhead_DPS_Status: </b>${Steelhead_DPS_Status}<br/>" +
                                               "<b>Coho_Restorability: </b>${Coho_Restorability}<br/>" +
                                               "<b>Steelhead_Restorability: </b>${Steelhead_Restorability}<br/>" +
                                               "<b>UpStream_ASP: </b>${UpStream_ASP}<br/>" +
                                               "<b>Coastal_Anadromy_Zone_FPRs: </b>${Coastal_Anadromy_Zone_FPRs}<br/>" +
                                               "<b>Status_303d_2010: </b>${Status_303d_2010}<br/>" +
                                               "<b>County: </b>${County}<br/>" +
                                               "<b>Acres: </b>${Acres}<br/>");
                                           feature.setInfoTemplate(Calwater);
                                       }
                                       
                                       else if (layerName === 'Special Treatment Areas') {


                                           var Calwater3 = new InfoTemplate("Special Treatment Areas",
                                             "<b>Area_Type: </b>${Area_Type}<br/>" +
                                               "<b>Area_Name: </b>${Area_Name}<br/>" +
                                               "<b>County: </b>${County}<br/>" +
                                               "<b>Quad_Name: </b>${Quad_Name}<br/>"
                                                );
                                           feature.setInfoTemplate(Calwater3);
                                       }
                                       else if (layerName === 'Coastal Zone Boundary') {


                                           var Calwater4 = new InfoTemplate("Coastal Zone Boundary",
                                            "<b>AREA_TYPE: </b>${AREA_TYPE}<br/>" +
                                               "<b>CODE_SOURCE: </b>${CODE_SOURCE}<br/>"
                                                );
                                           feature.setInfoTemplate(Calwater4);
                                       }
                                       else if (layerName === '303(d) Channels, 2010') {


                                           var Calwater8 = new InfoTemplate("303(d) Channel 2010",
                                            "<b>TDCKEY: </b>${TDCKEY}<br/>" +
                                               "<b>RF3RCHID: </b>${RF3RCHID}<br/>" +
                                               "<b>PNAME: </b>${PNAME}<br/>" +
                                               "<b>PNMCD: </b>${PNMCD}<br/>" +
                                               "<b>RFORGFLAG: </b>${RFORGFLAG}<br/>" +
                                               "<b>UPDATE2: </b>${UPDATE2}<br/>" +
                                               "<b>UPDTCD2: </b>${UPDTCD2}<br/>" +
                                               "<b>UPDTSRC2: </b>${UPDTSRC2}<br/>" +
                                               "<b>FILLER: </b>${FILLER}<br/>" +
                                               "<b>WBID: </b>${WBID}<br/>" +
                                               "<b>WBNAME: </b>${WBNAME}<br/>" +
                                               "<b>REGION: </b>${REGION}<br/>" +
                                               "<b>REGION_NM: </b>${REGION_NM}<br/>" +


                                               "<b>WBTYPE: </b>${WBTYPE}<br/>" +
                                               "<b>WBTYPE_NM: </b>${WBTYPE_NM}<br/>"
                                                );
                                           feature.setInfoTemplate(Calwater8);
                                       }


                                       else if (layerName === '303(d) Waterbodies, 2010') {


                                           var Calwater9 = new InfoTemplate("303(d) Waterbody 2010",
                                            "<b>WATER: </b>${WATER}<br/>" +


                                               "<b>NAME: </b>${NAME}<br/>" +
                                               "<b>WRCBLAKES: </b>${WRCBLAKES}<br/>" +
                                               "<b>GNIS_ID: </b>${GNIS_ID}<br/>" +
                                               "<b>IFDKEY: </b>${IFDKEY}<br/>" +


                                               "<b>WBID: </b>${WBID}<br/>" +
                                               "<b>WBNAME: </b>${WBNAME}<br/>" +
                                               "<b>REGION: </b>${REGION}<br/>" +
                                               "<b>REGION_NM: </b>${REGION_NM}<br/>" +
                                               "<b>WBID: </b>${WBID}<br/>" +
                                               "<b>WBTYPE: </b>${WBTYPE}<br/>" +
                                               "<b>WBTYPE_NM: </b>${WBTYPE_NM}<br/>"
                                                );
                                           feature.setInfoTemplate(Calwater9);
                                       }
                                       else if (layerName === 'Rainfall 1900 – 1960 (USGS)') {


                                           var Calwater5 = new InfoTemplate("Rainfall 1900 – 1960",


                                               "<b>Mean Annual Rainfall (inches): </b>${Mean Annual Rainfall (inches)}<br/>"
                                                );
                                           feature.setInfoTemplate(Calwater5);
                                       }
                                       else if (layerName === 'Coho Status') {


                                           var Calwater6 = new InfoTemplate("Coho Status",


                                               "<b>ESU/DPS: </b>${ESU/DPS}<br/>" +
                                               "<b>Status: </b>${Status}<br/>" +
                                               "<b>Class: </b>${Class}<br/>"
                                                );
                                           feature.setInfoTemplate(Calwater6);
                                       }
                                       else if (layerName === 'Chinook Status') {


                                           var Calwater10 = new InfoTemplate("Chinook Status",


                                               "<b>ESU/DPS: </b>${ESU/DPS}<br/>" +
                                               "<b>Status: </b>${Status}<br/>" +
                                               "<b>Class: </b>${Class}<br/>"
                                                );
                                           feature.setInfoTemplate(Calwater10);
                                       }
                                       else if (layerName === 'Steelhead Status') {


                                           var Calwater16 = new InfoTemplate("Steelhead Status",


                                               "<b>ESU/DPS: </b>${ESU/DPS}<br/>" +
                                               "<b>Status: </b>${Status}<br/>" +
                                               "<b>Class: </b>${Class}<br/>"
                                                );
                                           feature.setInfoTemplate(Calwater16);
                                       }
                                       else if (layerName === 'Forest Districts') {


                                           var Calwater20 = new InfoTemplate("Forest Districts",


                                               "<b>Name: </b>${Name}<br/>" 
                                                );
                                           feature.setInfoTemplate(Calwater20);
                                       }
                                       else if (layerName === 'CA County Boundaries') {


                                           var Calwater8 = new InfoTemplate("County Boundary",


                                               "<b>County Name: </b>${County Name}<br/>"
                                                );
                                           feature.setInfoTemplate(Calwater8);
                                       }
                                       return feature;
                                   });
                               });


                             // InfoWindow expects an array of features from each deferred
                             // object that you pass. If the response from the task execution
                             // above is not an array of features, then you need to add a callback
                             // like the one above to post-process the response and return an
                             // array of features.
                             map.infoWindow.setFeatures([deferred]);
                             map.infoWindow.show(event.mapPoint);
                         }

Any idea is welcome.

Thanks,

Alex

Re: Identify task returns duplicates

RobertScheitlin__GISP — Wed, 30 Mar 2016 12:18:21 GMT

Alex,

Can you check your visible array that you use as the layerIds parameter for the IdentifyParams to see if it contains any duplicate layer IDs?

Re: Identify task returns duplicates

AlexGole — Wed, 30 Mar 2016 16:25:06 GMT

I am using this function to check if layers are visible and push layers that are visible or not:

dynaLayer1.on('visible-layers-change', function (e, index) {
visible.length = 0;
console.log('The layer(s) changed: ', e.visibleLayers.join(', '));
visible.push(e.visibleLayers)
});

When loading the map it indicates that these layers IDs are visible:

The layer(s) changed: 0, 4, 5, , 6, 7, 8, 9, 19

However, since I am dealing with scale dependent layers, the layer id 0 is not visible for instance when loading the map at an extent that shows all California.

Not too sure how to address that issue.

Re: Identify task returns duplicates

AlexGole — Wed, 30 Mar 2016 16:47:12 GMT

I actually found the issue in my code:

it was here in this section of the code"

map.on('layers-add-result', function (evt) {

dynaLayer1.setVisibleLayers([0, 4, 5, , 6, 7, 8, 9, 19]);

toc = new TOC({

map: map,

layerInfos: [{

layer: dynaLayer1,

title: "Layers"

}]

}, 'tocdiv');

toc.startup();

});

I removed this line:

dynaLayer1.setVisibleLayers([0, 4, 5, , 6, 7, 8, 9, 19]);

It is all back to normal now.