nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

Number of Features

RickeyFight

I am looking for some script that will count the number of features on the map and display it.

I am thinking something like this: Crime Mapper

I need this to change every time the filter changes.

Encuentra más publicaciones etiquetadas con

Accepted answers

RobertScheitlin__GISP

Rickey,

So here is your other threads example code with the feature count added to the end of the buttons div:

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=7, IE=9, IE=10">
    <!--The viewport meta tag is used to improve the presentation and behavior of the samples
      on iOS devices-->
    <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
    <title>Feature Layer - display results as an InfoWindow onHover</title>

    <link rel="stylesheet" href="http://js.arcgis.com/3.6/js/dojo/dijit/themes/tundra/tundra.css">
    <link rel="stylesheet" href="http://js.arcgis.com/3.6/js/esri/css/esri.css">
    <style>
      html, body, #mapDiv {
        padding:0;
        margin:0;
        height:100%;
      }
      #mapDiv {
        position: relative;
      }
      #buttons {
        background: #fff;
        box-shadow: 0 0 5px #888;
        left: 1em;
        padding: 0.5em;
        position: absolute;
        top: 1em;
        z-index: 40;
      }
    </style>

    <script src="http://js.arcgis.com/3.6/"></script>
    <script>
      var map, dialog;
      require([
        "esri/map", "esri/layers/FeatureLayer",
        "esri/symbols/SimpleFillSymbol", "esri/symbols/SimpleLineSymbol",
        "esri/renderers/SimpleRenderer", "dojo/query", "dojo/on", "dojo/dom"
      ], function(
        Map, FeatureLayer,
        SimpleFillSymbol, SimpleLineSymbol,
        SimpleRenderer, query, on, dom
      ) {

        map = new Map("mapDiv", {
          basemap: "streets",
          center: [-80.94, 33.646],
          zoom: 6,
          slider: false
        });

        var states = new FeatureLayer("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5", {
          mode: FeatureLayer.MODE_SNAPSHOT,
          outFields: ["NAME", "POP2000", "POP2007", "POP00_SQMI", "POP07_SQMI", "AVE_FAM_SZ","SQMI","SUB_REGION", "STATE_NAME"]
        });
        states.setDefinitionExpression("STATE_NAME = 'South Carolina'");

        var symbol = new SimpleFillSymbol();
        states.setRenderer(new SimpleRenderer(symbol));
        map.addLayer(states);

        states.on("update-end", function(evt){
          console.info(evt);
          dom.byId("featcount").innerHTML = " " + evt.target.graphics.length;
        });

         //setup click event for buttons
        query("input").forEach(function(node){
          on(node, "click", function (e) {
            var defExp = states.getDefinitionExpression(),
                defExp2 = "",
                defExp3 = "";
            switch (e.srcElement.value) {
              case "East Coast":
                defExp = "SUB_REGION LIKE '% Atlantic' AND STATE_NAME IN( 'New York', 'New Jersey', 'Delaware')";
                break;
              case "East North Central":
                defExp =  "SUB_REGION='East North Central'";
                break;
              case "Pacific":
                defExp ="SUB_REGION='Pacific'";
                break;
              case "Clear":
                defExp = "";
                break;
              case "SQMI":
                defExp2 = "SQMI>20000";
                break;
              case "AVE_FAM_SZ":
                defExp2 =  "AVE_FAM_SZ<3";
                break;
              case "PopMil":
                defExp2 = "POP2007>1000000";
                break;
              case "All":
                defExp3 = "1=1";
                break;
            }
            //var fDefExpr = (defExp !== "") ? ((defExp2 !== "") ? defExp + " AND " + defExp2 : defExp) : ((defExp2 !== "") ? defExp2 : "");

            defArr = [];
            if(defExp !== ""){
              defArr.push(defExp);
            }
            if(defExp2 !== ""){
              defArr.push(defExp2);
            }
            if(defExp3 !== ""){
              defArr.push(defExp3);
            }
            states.setDefinitionExpression(defArr.join(" AND "));
            });
        });
      });
    </script>
  </head>
  <body class="tundra">
    <div id="mapDiv">
      <div id="buttons">
        <input type="button" value="East Coast"/>
        <input type="button" value = "East North Central"/>
        <input type="button" value = "Pacific"/>
        <input type="button" value="SQMI"/>
        <input type="button" value="AVE_FAM_SZ"/>
        <input type="button" value="PopMil"/>
        <input type="button" value="Clear"/>
        <span id="featcount"> ???</span>
      </div>
    </div>
  </body>
</html>

All comments

RickeyFight

Robert,

Yes it is a feature layer with setDefinitionExpression.

Thank you

RobertScheitlin__GISP

Rickey,

OK, I will need a little more info though. Is it a feature layer with a definition query applied, or a QueryTask or what? If it is a FeatureLayer w/ Definition Query than all you need to do is get the length of the graphics array.

RickeyFight

Robert,

Number that meet the current criteria.

RobertScheitlin__GISP

Rickey,

Would it be the number in the current map extent or the number that meet the current criteria?

Únete a la Conversación

Los miembros registrados pueden publicar, seguir actualizaciones y más. ¿Nuevo aquí? Regístrate gratis.

Enlaces Rápidos

Community Help
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.