topic Re: Get Geographic Coordinates From Polygon Rings in ArcGIS JavaScript Maps SDK Questions

Get Geographic Coordinates From Polygon Rings

EssaddekMohammed — Sun, 18 Nov 2018 17:28:18 GMT

Hi All,

I would like to get geographic coordinates from a drawn polygon using the SketchViiewModel. But actually the api gets only ring.

switch (sketchViewModel.graphic.symbol.type)
{
case "symple-marker": {
$("#Longitude").val(event.geometry.longitude);
$("#Latitude").val(event.geometry.latitude);
break;
}
case "polygon": {
event.geometry.rings; // ??
break;
}
}

Is there anyway to do it?

Regards.

Re: Get Geographic Coordinates From Polygon Rings

RobertScheitlin__GISP — Mon, 19 Nov 2018 01:27:21 GMT

Essaddek,

The rings property is a two dimensional array means it is an array of arrays of coordinates. So you have to loop through the rings array to get the polygons rings and then loop over the ring vertex coordinates. You can use the getPoint method to get a specific point from a specific rings of a Polygon.

Polygon | API Reference | ArcGIS API for JavaScript 3.26