Create a point/Polyline on Map with different projection

Pa_Lotus — Thu, 25 May 2023 00:18:07 GMT

With below code, am just trying to add a point/Polyline on the map

Spatial Reference is 2881

for Example POINT (914723.27587074414 524669.72858949) and PolyLine(912367.09095057845 525239.943328321, 912374.28713041171 525217.16023740917)

I tried, symbology is not showing up

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

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

button {
display: block;
}
</style>
<script src="https://js.arcgis.com/3.29/"></script>
<script>
var map, tb;

require([
"esri/map", "esri/toolbars/draw",
"esri/symbols/SimpleMarkerSymbol",
"esri/graphic", "esri/geometry/Point", "esri/SpatialReference",
"esri/Color", "dojo/domReady!"
], function (
Map, Draw,
SimpleMarkerSymbol,
Graphic, Point, SpatialReference,
Color
) {
map = new Map("mapDiv", {
basemap: "streets",
zoom: 3
});
var markerSymbol = new SimpleMarkerSymbol();
markerSymbol.setPath("M16,4.938c-7.732,0-14,4.701-14,10.5c0,1.981,0.741,3.833,2.016,5.414L2,25.272l5.613-1.44c2.339,1.316,5.237,2.106,8.387,2.106c7.732,0,14-4.701,14-10.5S23.732,4.938,16,4.938zM16.868,21.375h-1.969v-1.889h1.969V21.375zM16.772,18.094h-1.777l-0.176-8.083h2.113L16.772,18.094z");
markerSymbol.setColor(new Color("#00FFFF"));

var symbol;
symbol = markerSymbol;
var point = new Point([524669.72858949, 914723.2758707441], new SpatialReference({ wkid: 2881 }));
map.graphics.add(new Graphic(point, symbol));

});
</script>
</head>
<body>

</body>
</html>

Re: Create a point/Polyline on Map with different projection

JoelBennett — Fri, 26 May 2023 00:13:45 GMT

It looks like you will need to project your geometries before adding them to the map. The preferred way to do this is via the client-side projection engine like shown below:

<!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>Sapes and Symbols</title> <link rel="stylesheet" href="https://js.arcgis.com/3.29/esri/css/esri.css"> <style> #info { top: 20px; color: #444; height: auto; font-family: arial; right: 20px; margin: 5px; padding: 10px; position: absolute; width: 115px; z-index: 40; border: solid 2px #666; border-radius: 4px; background-color: #fff; } html, body, #mapDiv { padding: 0; margin: 0; height: 100%; } button { display: block; } </style> <script src="https://js.arcgis.com/3.29/"></script> <script> require(["esri/map", "esri/toolbars/draw", "esri/symbols/SimpleMarkerSymbol", "esri/graphic", "esri/geometry/Point", "esri/SpatialReference", "esri/Color", "esri/geometry/projection", "dojo/domReady!"], function (Map, Draw, SimpleMarkerSymbol, Graphic, Point, SpatialReference, Color, projectionEngine) { projectionEngine.load().then(function() { var map = new Map("mapDiv", { basemap: "streets", zoom: 3 }); map.on("load", function() { var markerSymbol = new SimpleMarkerSymbol(); markerSymbol.setPath("M16,4.938c-7.732,0-14,4.701-14,10.5c0,1.981,0.741,3.833,2.016,5.414L2,25.272l5.613-1.44c2.339,1.316,5.237,2.106,8.387,2.106c7.732,0,14-4.701,14-10.5S23.732,4.938,16,4.938zM16.868,21.375h-1.969v-1.889h1.969V21.375zM16.772,18.094h-1.777l-0.176-8.083h2.113L16.772,18.094z"); markerSymbol.setColor(new Color("#00FFFF")); var point = new Point([524669.72858949, 914723.2758707441], new SpatialReference(2881)); var projectedPoint = projectionEngine.project(point, map.spatialReference); map.graphics.add(new Graphic(projectedPoint, markerSymbol)); }); }); }); </script> </head> <body> <div id="mapDiv"></div> </body> </html>

If working with browsers that don't support the client-side projection engine, an alternative is to use the server side GeometryService.project.

topic Re: Create a point/Polyline on Map with different projection in ArcGIS JavaScript Maps SDK Questions

Create a point/Polyline on Map with different projection

Re: Create a point/Polyline on Map with different projection