How Do I Draw Queried Geometry w/ ArcGIS JavaScript API?

ChristopherLai — Mon, 11 Jul 2016 23:29:22 GMT

I am new to all of coding and I have a rest point with all of my park polygons, what I want to do is be able to select a park name from a drop down menu and query out and display the single park that is chosen. I believe I have everything set up to query my geometry, now I don't know how to get it to draw the queried feature. right now I have 2 different drop downs. According to my professor i have the 2 selections stored in "selectedParkFeature" and "selectedLayer" variable, and all I have to do now is to draw them on the map. I have researched and I am stuck, please help. I am doing all of this on ArcGIS JavaScript API 3.17.

query("#selectParkName").on('change', function (evt) {

var tempParkName = evt.target.value;

getParkFeature(tempParkName);

});

//function to select the park

function getParkFeature(in_park_name) {

var query = new Query();

query.where = "NAME='" + in_park_name + "'";

query.outFields = ["*"];

park.queryFeatures(query, function (featureSet) {

console.log(featureSet);

selectedParkFeature = featureSet.features[0];

});

}

query("#myPick").on('change', function (evt) {

var tempLayerName = evt.target.value;

chooseLayer(tempLayerName);

});

function chooseLayer(inLyrName) {

selectedLayer = map.getLayer(inLyrName);

var query = new Query();

query.geometry = selectedParkFeature.geometry;

query.outFields = ["*"];

selectedLayer.queryFeatures(query, function (featureSet) {

console.log(featureSet);

//now you can draw these features on the map

});

Re: How Do I Draw Queried Geometry w/ ArcGIS JavaScript API?

ChrisSmith7 — Tue, 12 Jul 2016 00:01:04 GMT

Christopher,

It looks like this is part of a school assignment. I would recommend you check out this:

Using QueryTask, Query, and FeatureSet | Guide | ArcGIS API for JavaScript 3.17

Specifically, I'd have a look at the "Create a function to show the results" section to see if that gives you any ideas!

topic How Do I Draw Queried Geometry w/ ArcGIS JavaScript API? in ArcGIS JavaScript Maps SDK Questions

How Do I Draw Queried Geometry w/ ArcGIS JavaScript API?

Re: How Do I Draw Queried Geometry w/ ArcGIS JavaScript API?