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Reverse GeoCode

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08-04-2014 06:36 AM
jaykapalczynski
Honored Contributor

Any examples out there of allowing the user to type in a lat long and creating a point at that location and/or zooming to it,,,,

Much like the below but with XY not address

Geocode an address | ArcGIS API for JavaScript

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TimWitt2
MVP Alum

I built on the example I gave you, check it out:

<!DOCTYPE html>

<html>

  <head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

    <!--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>Find Address</title>

    <link rel="stylesheet" href="http://js.arcgis.com/3.10/js/dojo/dijit/themes/claro/claro.css">

    <link rel="stylesheet" href="http://js.arcgis.com/3.10/js/esri/css/esri.css">

    <style>

      html, body { height: 100%; width: 100%; margin: 0; padding: 0; }

      #map {

        padding: 0;

        border: solid 2px #666;

        margin: 0 5px 5px 5px;

      }

      #header {

        border: solid 2px #666;

        color: #666;

        font-family: sans-serif;

        font-size: 1.1em;

        height: auto;

        margin: 5px;

        overflow: hidden;

        padding: 10px 0 10px 20px;

        text-align:left;

      }

      .roundedCorners {

        -webkit-border-radius: 5px;

        -moz-border-radius: 5px;

        border-radius: 5px;

      }

    </style>

    <script src="http://js.arcgis.com/3.10/"></script>

    <script>

      var map;

      require([

        "esri/map", "esri/tasks/locator", "esri/graphic",

        "esri/geometry/webMercatorUtils",

        "esri/symbols/SimpleMarkerSymbol", "esri/symbols/SimpleLineSymbol",

        "esri/InfoTemplate", "esri/Color", "esri/geometry/Point", "dojo/on",

        "dojo/number", "dojo/parser", "dojo/dom", "dijit/registry", "dijit/form/TextBox", "dijit/form/Button",

        "dijit/layout/BorderContainer", "dijit/layout/ContentPane", "dojo/domReady!"

      ], function(

        Map, Locator, Graphic,

        webMercatorUtils,

        SimpleMarkerSymbol, SimpleLineSymbol,

        InfoTemplate, Color, Point, on,

        number, parser, dom, registry, TextBox

      ) {

        parser.parse();

        map = new Map("map", {

          basemap: "streets",

          center: [-95.273, 38.95],

          zoom: 14

        });

       

        var symbol = new SimpleMarkerSymbol(

          SimpleMarkerSymbol.STYLE_CIRCLE,

          15,

          new SimpleLineSymbol(

            SimpleLineSymbol.STYLE_SOLID,

            new Color([0, 0, 255, 0.5]),

            8

          ),

          new Color([0, 0, 255])

        );

       

        var locator = new Locator("http://geocode.arcgis.com/arcgis/rest/services/World/GeocodeServer");

        var infoTemplate = new InfoTemplate("Location", "Address: ${Address}");

 

        locator.on("location-to-address-complete", function(evt) {

          if (evt.address.address) {

            var address = evt.address.address;

            var location = webMercatorUtils.geographicToWebMercator(evt.address.location);

            //this service returns geocoding results in geographic - convert to web mercator to display on map

            // var location = webMercatorUtils.geographicToWebMercator(evt.location);

            var graphic = new Graphic(location, symbol, address, infoTemplate);

            map.graphics.add(graphic);

           

            map.infoWindow.setTitle(graphic.getTitle());

            map.infoWindow.setContent(graphic.getContent());

           

            //display the info window with the address information

            var screenPnt = map.toScreen(location);

            map.infoWindow.resize(200,100);

            map.infoWindow.show(screenPnt, map.getInfoWindowAnchor(screenPnt));

          }

        });

        map.on("click", function(evt) {

          map.graphics.clear();

          locator.locationToAddress(webMercatorUtils.webMercatorToGeographic(evt.mapPoint), 100);

        });

        var LongTextBox = new TextBox({

            placeHolder: "Longitude",

            value:"-95.273",

            intermediateChanges:true

        },"LongTextBoxDiv");

       

                var LatTextBox = new TextBox({

            placeHolder: "Latitude",

            value:"38.95",

            intermediateChanges:true

        },"LatTextBoxDiv");

       

        on(registry.byId("latlong"), "click", getaddress);

       

        function getaddress(){

          var Lat = LatTextBox.get("value");

          var Long = LongTextBox.get("value");

          var LatLongLocation = new Point([Long,Lat]);

          locator.locationToAddress(LatLongLocation , 100);

          map.graphics.clear();

        }

       

      });

    </script>

  </head>

  <body class="claro">

    <div id="mainWindow" data-dojo-type="dijit/layout/BorderContainer"

         data-dojo-props="design:'headline', gutters:false"

         style="width:100%; height:100%;">

      <div id="header" class="roundedCorners"

           data-dojo-type="dijit/layout/ContentPane"

           data-dojo-props="region:'top'">

        Long: <input id="LongTextBoxDiv" />

        Lat: <input id="LatTextBoxDiv" />

       

        <button id="latlong" data-dojo-type="dijit.form.Button" type="button" data-dojo-attach-point="button">Get Address</button>

       

      </div>

      <div id="map" class="roundedCorners"

           data-dojo-type="dijit/layout/ContentPane"

           data-dojo-props="region:'center'">

      </div>

    </div>

  </body>

</html>

Hope this answers your question!

Tim

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10 Replies
TimWitt2
MVP Alum

Jay,

you could use this Reverse geocode | ArcGIS API for JavaScript , but instead of a "map on click event" you could create a box, where a user can put in the lat/long, then create a point from that information and use the point as your "evt.mapPoint".

Tim

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TimWitt2
MVP Alum

I built on the example I gave you, check it out:

<!DOCTYPE html>

<html>

  <head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

    <!--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>Find Address</title>

    <link rel="stylesheet" href="http://js.arcgis.com/3.10/js/dojo/dijit/themes/claro/claro.css">

    <link rel="stylesheet" href="http://js.arcgis.com/3.10/js/esri/css/esri.css">

    <style>

      html, body { height: 100%; width: 100%; margin: 0; padding: 0; }

      #map {

        padding: 0;

        border: solid 2px #666;

        margin: 0 5px 5px 5px;

      }

      #header {

        border: solid 2px #666;

        color: #666;

        font-family: sans-serif;

        font-size: 1.1em;

        height: auto;

        margin: 5px;

        overflow: hidden;

        padding: 10px 0 10px 20px;

        text-align:left;

      }

      .roundedCorners {

        -webkit-border-radius: 5px;

        -moz-border-radius: 5px;

        border-radius: 5px;

      }

    </style>

    <script src="http://js.arcgis.com/3.10/"></script>

    <script>

      var map;

      require([

        "esri/map", "esri/tasks/locator", "esri/graphic",

        "esri/geometry/webMercatorUtils",

        "esri/symbols/SimpleMarkerSymbol", "esri/symbols/SimpleLineSymbol",

        "esri/InfoTemplate", "esri/Color", "esri/geometry/Point", "dojo/on",

        "dojo/number", "dojo/parser", "dojo/dom", "dijit/registry", "dijit/form/TextBox", "dijit/form/Button",

        "dijit/layout/BorderContainer", "dijit/layout/ContentPane", "dojo/domReady!"

      ], function(

        Map, Locator, Graphic,

        webMercatorUtils,

        SimpleMarkerSymbol, SimpleLineSymbol,

        InfoTemplate, Color, Point, on,

        number, parser, dom, registry, TextBox

      ) {

        parser.parse();

        map = new Map("map", {

          basemap: "streets",

          center: [-95.273, 38.95],

          zoom: 14

        });

       

        var symbol = new SimpleMarkerSymbol(

          SimpleMarkerSymbol.STYLE_CIRCLE,

          15,

          new SimpleLineSymbol(

            SimpleLineSymbol.STYLE_SOLID,

            new Color([0, 0, 255, 0.5]),

            8

          ),

          new Color([0, 0, 255])

        );

       

        var locator = new Locator("http://geocode.arcgis.com/arcgis/rest/services/World/GeocodeServer");

        var infoTemplate = new InfoTemplate("Location", "Address: ${Address}");

 

        locator.on("location-to-address-complete", function(evt) {

          if (evt.address.address) {

            var address = evt.address.address;

            var location = webMercatorUtils.geographicToWebMercator(evt.address.location);

            //this service returns geocoding results in geographic - convert to web mercator to display on map

            // var location = webMercatorUtils.geographicToWebMercator(evt.location);

            var graphic = new Graphic(location, symbol, address, infoTemplate);

            map.graphics.add(graphic);

           

            map.infoWindow.setTitle(graphic.getTitle());

            map.infoWindow.setContent(graphic.getContent());

           

            //display the info window with the address information

            var screenPnt = map.toScreen(location);

            map.infoWindow.resize(200,100);

            map.infoWindow.show(screenPnt, map.getInfoWindowAnchor(screenPnt));

          }

        });

        map.on("click", function(evt) {

          map.graphics.clear();

          locator.locationToAddress(webMercatorUtils.webMercatorToGeographic(evt.mapPoint), 100);

        });

        var LongTextBox = new TextBox({

            placeHolder: "Longitude",

            value:"-95.273",

            intermediateChanges:true

        },"LongTextBoxDiv");

       

                var LatTextBox = new TextBox({

            placeHolder: "Latitude",

            value:"38.95",

            intermediateChanges:true

        },"LatTextBoxDiv");

       

        on(registry.byId("latlong"), "click", getaddress);

       

        function getaddress(){

          var Lat = LatTextBox.get("value");

          var Long = LongTextBox.get("value");

          var LatLongLocation = new Point([Long,Lat]);

          locator.locationToAddress(LatLongLocation , 100);

          map.graphics.clear();

        }

       

      });

    </script>

  </head>

  <body class="claro">

    <div id="mainWindow" data-dojo-type="dijit/layout/BorderContainer"

         data-dojo-props="design:'headline', gutters:false"

         style="width:100%; height:100%;">

      <div id="header" class="roundedCorners"

           data-dojo-type="dijit/layout/ContentPane"

           data-dojo-props="region:'top'">

        Long: <input id="LongTextBoxDiv" />

        Lat: <input id="LatTextBoxDiv" />

       

        <button id="latlong" data-dojo-type="dijit.form.Button" type="button" data-dojo-attach-point="button">Get Address</button>

       

      </div>

      <div id="map" class="roundedCorners"

           data-dojo-type="dijit/layout/ContentPane"

           data-dojo-props="region:'center'">

      </div>

    </div>

  </body>

</html>

Hope this answers your question!

Tim

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jaykapalczynski
Honored Contributor

Worked great Tim....thanks...

And thats Jeff....will be revisiting this once I figure out what their preference is.....so if the do degrees minutes seconds...I test for this?  Then grab the values from the textboxes and convert them pass to the locator?

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TimWitt2
MVP Alum

You convert it from deg/min/sec and once you have your Lat/Long feed them into line 122, here:

var LatLongLocation = new Point([Long,Lat]); 

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JeffJacobson
Frequent Contributor

You may need this too, depending on if your users want to enter degrees-minutes-seconds:
Parse Degrees Minutes Seconds (DMS) into Decimal Degrees

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jaykapalczynski
Honored Contributor

How would I zoom to it?

Would like to zoom to the Graphic being created below

   locator.on("location-to-address-complete", function(evt) {

          if (evt.address.address) {

            var address = evt.address.address;

            var location = webMercatorUtils.geographicToWebMercator(evt.address.location);

            //this service returns geocoding results in geographic - convert to web mercator to display on map

            // var location = webMercatorUtils.geographicToWebMercator(evt.location);

            var graphic = new Graphic(location, ReverseGeocodesymbol, address, infoTemplateRG);

            app.map.graphics.add(graphic);

            app.map.infoWindow.setTitle(graphic.getTitle());

            app.map.infoWindow.setContent(graphic.getContent());

            //display the info window with the address information

            var screenPnt = app.map.toScreen(location);

            app.map.infoWindow.resize(200,100);

            app.map.infoWindow.show(screenPnt, app.map.getInfoWindowAnchor(screenPnt));

          var stateExtent = location [0].geometry.getExtent().expand(5.0);
            map
.setExtent(stateExtent);           

          

          }

        });

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TimWitt2
MVP Alum

Instead of what you have, add the following:

var graphicExtent = graphic._extent.getExtent();

map.setExtent(graphicExtent);

Hope this helps!

Tim

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jaykapalczynski
Honored Contributor

I do this and nothing happens..

Also tried getting rid of the _ in your example and still no zooming

var graphicExtent = graphic._extent.getExtent();

Trying this way

var graphicExtent = graphic.extent.getExtent();

Error

TypeError {stack: (...), message: "Cannot read property 'getExtent' of undefined"

}

        locator.on("location-to-address-complete", function(evt) {

          if (evt.address.address) {

            var address = evt.address.address;

            var location = webMercatorUtils.geographicToWebMercator(evt.address.location);

            //this service returns geocoding results in geographic - convert to web mercator to display on map

            // var location = webMercatorUtils.geographicToWebMercator(evt.location);

            var graphic = new Graphic(location, ReverseGeocodesymbol, address, infoTemplateRG);

            app.map.graphics.add(graphic);

            app.map.infoWindow.setTitle(graphic.getTitle());

            app.map.infoWindow.setContent(graphic.getContent());

            //display the info window with the address information

            var screenPnt = app.map.toScreen(location);

            app.map.infoWindow.resize(200,100);

            app.map.infoWindow.show(screenPnt, app.map.getInfoWindowAnchor(screenPnt));

            var graphicExtent = graphic._extent.getExtent();

           app.map.setExtent(graphicExtent);

          }

        });

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jaykapalczynski
Honored Contributor

THink I got it....I was not moving my map...I moved my map and ran it and it centered on the graphic being created.....my next and last question ....how do I zoom to it...can I do this

var graphicExtent = graphic1._extent.getExtent().zoomin;

Something similar to the map  :  zoom: 7,

Tried this and no go

  var graphicExtent = graphic._extent.getExtent();

  app.map.centerAndZoom(graphicExtent,7);

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