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; } } }

Unable to draw a polyline on map

ShaningYu

Borrowed someone script that could draw a polyline on map (defined here: var polyline) in Portand, WA. I added var polyline2 with the values, but this line was not drawing. I am new in JS GIS. Please help if you can share your experience. Thanks in advance.

<!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">
        <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
        <title>Build your first application</title>
<link rel="stylesheet" type="text/css" href="http://js.arcgis.com/3.8/js/esri/css/esri.css">
        <style type="text/css">
            html, body, #map {
                padding: 0;
                margin: 0;
                height: 100%;
            }
        </style>
        <script src="http://js.arcgis.com/3.8/"></script>
        <script>
            var map;
            require(["esri/map", "dojo/ready", "dojo/on", "esri/geometry/Polyline", "esri/graphic", "esri/symbols/SimpleLineSymbol", "dojo/domReady!"], function(Map, ready, on, Polyline, Graphic, SimpleLineSymbol) {

        var map = new Map("map", {
          center: [-77.1, 38.9], //longitude, latitude
          zoom: 11,
          basemap: "streets",
          slider: true, //default
          sliderPosition: "top-left" //default
        });

        ready(function (){
          on(map, "load", drawPath);
          function drawPath(){
         var polylineJson = { "paths":[[[-122.68,45.53], [-122.58,45.55], [-122.57,45.58],[-122.53,45.6]]], "spatialReference":{"wkid":4326}};
            var polylineJson2 = { "paths":[[[201394.01178484457,173661.08635829584],[201392.0117168416,173661.08690949593],[ 201388.01158083565, 173661.08801189612 ],[ 201386.01151283266, 173661.08856309619 ],[ 201384.0114448297, 173661.08911429628 ],[ 201382.0113768267, 173661.08966549637 ],[ 201380.01130882374, 173661.09021669647 ],[ 201378.01124082075, 173661.09076789653 ] ] ],"spatialReference":{"wkid":102100} };
            var polyline = new Polyline(polylineJson);
            var polylineSymbol = new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID, new dojo.Color([255,0,0]), 3);
            var g = new Graphic(polyline, polylineSymbol, null, null);
            map.graphics.add(g);
      var polyline2 = new Polyline(polylineJson2);
      var g2 = new Graphic(polyline2, polylineSymbol, null, null);
            map.graphics.add(g2);
          }
        });
     });
        </script>
    </head>
    <body class="claro">
        <div id="map"></div>
    </body>
</html>

タグ付けされた投稿をもっと見る

Accepted answers

JonathanUihlein

@Ken

Thank you for your help. You are completely correct. shaningesri made another thread on the topic earlier:

http://forums.arcgis.com/threads/99906-Add-graphic-not-successufl

It's always been a coordinates issue but I have been unsuccessful in communicating that to shaningesri.

All comments

ShaningYu

Jon: Thanks for your help. The pro. got solved after using correct LAT/LON values.

JonathanUihlein

kenbuja

Are you sure those are the correct coordinates for the line? If you change the first coordinate, you'll see the line off the coast of Africa.

var polylineJson2 = { "paths":[[[2013940.01178484457,1736610.08635829584],...

Also, can you get in the habit of putting your code within the CODE tags? It makes it much easier to read.

会話に参加する

サインインしたメンバーは投稿、更新のフォローなどができます。初めてですか？無料アカウントを登録してください。

クイックリンク

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