Get extent of CsvLayer

LeiZhong — Thu, 02 Oct 2014 14:31:44 GMT

I'm working with Arcgis API for javascript. I'd like the map to zoom to the csvlayer I added. However, I can't seem to find the map extent, as layer.extent is undefined. What would be the appopriate way to achieve this? Is there a property of the layer for the extent? I inspected the layer object in IE Developer tool but can't anything useful.

Re: Get extent of CsvLayer

KellyHutchins — Thu, 02 Oct 2014 16:23:35 GMT

You can use the graphicsUtils graphicsExtent method which takes an array of graphics and returns an extent you can use to set the map's extent. Here's an example.

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no"/>
    <title>Simple Map</title>
    <link rel="stylesheet" href="http://js.arcgis.com/3.10/js/esri/css/esri.css">
    <style>
      html, body, #map {
        height: 100%;
        width: 100%;
        margin: 0;
        padding: 0;
      }
      body {
        background-color: #FFF;
        overflow: hidden;
        font-family: "Trebuchet MS";
      }
    </style>
    <script src="http://js.arcgis.com/3.10/"></script>
    <script>
      var map, csv;


      require([
        "esri/map", 
        "esri/layers/CSVLayer",
        "esri/Color",
        "esri/symbols/SimpleMarkerSymbol",
        "esri/renderers/SimpleRenderer",
        "esri/InfoTemplate",
        "esri/urlUtils",
        "esri/graphicsUtils",
        "dojo/domReady!"
      ], function(
        Map, CSVLayer, Color, SimpleMarkerSymbol, SimpleRenderer, InfoTemplate, urlUtils, graphicsUtils
      ) {

        map = new Map("map", {
          basemap: "gray",
          center: [ -60, -10 ],
          zoom: 4 
        });
        csv = new CSVLayer("2.5_week.csv", {
          copyright: "USGS.gov"
        });
        var orangeRed = new Color([238, 69, 0, 0.5]); // hex is #ff4500
        var marker = new SimpleMarkerSymbol("solid", 15, null, orangeRed);
        var renderer = new SimpleRenderer(marker);
        csv.setRenderer(renderer);


        var template = new InfoTemplate("${type}", "${place}");
        csv.setInfoTemplate(template);
        csv.on("update-end", function(){
          var graphics = graphicsUtils.graphicsExtent(csv.graphics);
          map.setExtent(graphics);


        });
        map.addLayer(csv);






      });
    </script>
  </head>


  <body>
    <div id="map"></div>
  </body>
</html>

Re: Get extent of CsvLayer

LeiZhong — Thu, 02 Oct 2014 18:06:39 GMT

Kelly, your code worked perfect. I tried csv.initialExtent which did not give the correct extent. Looks I will need to look into graphicsUtils for more goodies. Thanks!

topic Re: Get extent of CsvLayer in ArcGIS JavaScript Maps SDK Questions

Get extent of CsvLayer

Re: Get extent of CsvLayer

Re: Get extent of CsvLayer