Issue with geometryEngine.geodesicLength on spatialReference 2039

YarivHabot — Mon, 14 Jan 2019 20:30:19 GMT

Hello,

I'm trying to draw a polygon and get its perimeter and area. Once I'm using spatialReference 2039, the geometryEngine.geodesicLength and geometryEngine.geodesicArea methods fail with this error:

Uncaught Error: Not Implemented
at Object.d.df (VM1280 geometryEngine.js:535)
at Function.b.kc (VM1280 geometryEngine.js:1171)
at b.V (VM1280 geometryEngine.js:773)
at Function.g.PS (VM1280 geometryEngine.js:608)
at Function.d.geodesicLength (VM1280 geometryEngine.js:1275)
at createGraphic (index.html?sample=draw-line:92)
at Object.updateVertices (index.html?sample=draw-line:61)
at Object.r [as onvertex-add] (VM1269 dojo.js:60)
at Function.h.emit (VM1269 dojo.js:55)
at Function.h.emit (VM1269 dojo.js:56)

My code is based on this sample: ArcGIS API for JavaScript Sandbox and can be tested here: Draw polyline - 4.9 . The error appears once drawing begins. Following is my code.

Can you help me out?

<!DOCTYPE html>

<html>

<head>

<title>Draw polyline - 4.9</title>

<style>

html,

body,

#viewDiv {

height: 100%;

width: 100%;

margin: 0;

padding: 0;

}

</style>

require([

"esri/Map",

"esri/views/MapView",

"esri/views/2d/draw/Draw",

"esri/Graphic",

"esri/geometry/Polygon",

"esri/geometry/geometryEngine",

"esri/geometry/SpatialReference",

"esri/geometry/Extent",

"esri/layers/TileLayer"

], function(

Map, MapView, Draw, Graphic, Polygon, geometryEngine, SpatialReference, Extent, TileLayer

) {

const map = new Map({

basemap: "satellite"

});

const view = new MapView({

container: "viewDiv",

map: map,

spatialReference: new SpatialReference({wkid: 2039})

});

view.extent = new Extent({

xmin: 169209,

ymin: 659425,

xmax: 192454,

ymax: 672847,

spatialReference: {wkid: 2039}

});

map.layers.add(new TileLayer({ url: "http://gisn.tel-aviv.gov.il/arcgis/rest/services/IView2Ortho2017/MapServer" }));

// add the button for the draw tool

view.ui.add("line-button", "top-left");

const draw = new Draw({

view: view

});

// draw polyline button

document.getElementById("line-button").onclick = function() {

view.graphics.removeAll();

// creates and returns an instance of PolyLineDrawAction

const action = draw.create("polyline");

// focus the view to activate keyboard shortcuts for sketching

view.focus();

// listen polylineDrawAction events to give immediate visual feedback

// to users as the line is being drawn on the view.

action.on(["vertex-add", "vertex-remove", "cursor-update", "redo",

"undo", "draw-complete"

], updateVertices);

}

// Checks if the last vertex is making the line intersect itself.

function updateVertices(event) {

// create a polyline from returned vertices

const result = createGraphic(event);

// if the last vertex is making the line intersects itself,

// prevent the events from firing

if (result.selfIntersects) {

event.preventDefault();

}

// create a new graphic presenting the polyline that is being drawn on the view

function createGraphic(event) {

const vertices = event.vertices;

view.graphics.removeAll();

//var polygon = createPolygon(vertices);

// a graphic representing the polyline that is being drawn

const graphic = new Graphic({

geometry: {

type: "polyline",

paths: vertices,

spatialReference: view.spatialReference

symbol: {

type: "simple-line", // autocasts as new SimpleFillSymbol

color: [4, 90, 141],

width: 4,

cap: "round",

join: "round"

}

});

// check if the polyline intersects itself.

const intersectingSegment = getIntersectingSegment(graphic.geometry);

// Add a new graphic for the intersecting segment.

if (intersectingSegment) {

view.graphics.addMany([graphic, intersectingSegment]);

}

// Just add the graphic representing the polyline if no intersection

else {

view.graphics.add(graphic);

}

var area = geometryEngine.geodesicLength(graphic.geometry, "meters");

console.log(area);

// return intersectingSegment

return {

selfIntersects: intersectingSegment

}

function createPolygon(vertices) {

return new Polygon({

rings: vertices,

spatialReference: view.spatialReference

});

}

// function that checks if the line intersects itself

function isSelfIntersecting(polyline) {

if (polyline.paths[0].length < 3) {

return false

}

const line = polyline.clone();

//get the last segment from the polyline that is being drawn

const lastSegment = getLastSegment(polyline);

line.removePoint(0, line.paths[0].length - 1);

// returns true if the line intersects itself, false otherwise

return geometryEngine.crosses(lastSegment, line);

}

// Checks if the line intersects itself. If yes, change the last

// segment's symbol giving a visual feedback to the user.

function getIntersectingSegment(polyline) {

if (isSelfIntersecting(polyline)) {

return new Graphic({

geometry: getLastSegment(polyline),

symbol: {

type: "simple-line", // autocasts as new SimpleLineSymbol

style: "short-dot",

width: 3.5,

color: "yellow"

}

});

}

return null;

}

// Get the last segment of the polyline that is being drawn

function getLastSegment(polyline) {

const line = polyline.clone();

const lastXYPoint = line.removePoint(0, line.paths[0].length - 1);

const existingLineFinalPoint = line.getPoint(0, line.paths[0].length -

1);

return {

type: "polyline",

spatialReference: view.spatialReference,

hasZ: false,

paths: [

[

[existingLineFinalPoint.x, existingLineFinalPoint.y],

[lastXYPoint.x, lastXYPoint.y]

]

};

}

});

</script>

</head>

<body>

<div id="line-button" class="esri-widget esri-widget--button esri-interactive"

title="Draw polyline">

</div>

</body>

</html>

Re: Issue with geometryEngine.geodesicLength on spatialReference 2039

JohnGrayson — Tue, 15 Jan 2019 16:15:22 GMT

As mentioned in the help, the geometryEngine.geodesicLength() method works with 4326 and Web Mercator spatial references, and it suggests you should use geometryEngine.planarLength() instead.

Re: Issue with geometryEngine.geodesicLength on spatialReference 2039

jimiechaos — Sat, 14 Jan 2023 09:47:39 GMT

thank you

topic Re: Issue with geometryEngine.geodesicLength on spatialReference 2039 in ArcGIS JavaScript Maps SDK Questions

Issue with geometryEngine.geodesicLength on spatialReference 2039

Re: Issue with geometryEngine.geodesicLength on spatialReference 2039

Re: Issue with geometryEngine.geodesicLength on spatialReference 2039