topic Re: Invalid Coordinates captured from Sketch widget event in ArcGIS JavaScript Maps SDK Questions

Invalid Coordinates captured from Sketch widget event

DeanMcDonald — Mon, 15 Apr 2019 19:29:10 GMT

I'm trying to capture the lat/long points of the geometry object belonging to a graphic drawn using the Sketch widget. This is saved along with the various other attributes needed so I can recreate a graphic later that was drawn by one of my users.

However I seem to be getting invalid coordinate values from all the graphics objects created using Sketch.

Below is an example of the 'paths' attribute of a polyline geometry object belonging to a graphic created by Sketch when I log it in console:

path: [[3705938.9073652048, 7757323.750164009], [6425874.121864194, 5957078.859992016]]

Those values don't look right to me since afaik coordinate values can only be a maximum of +/-180 for lat and +/-90 for long. Sure enough when I save those in the database and try to recreate the Graphics later using those values they don't appear, but entering something more sane as coordinates does work such as

path: [60.44300476667183, 62.70164927848015], [48.604437825842, 72.97478588000511]

I've tried simply moving the decimal point down 5 or so spaces but then I get completely inaccurate placement and it doesn't seem like the right thing to do anyway. The coordinate seem like something more than just incorrect decimal placement has happened

Below is a snippet of the code I have where the graphic is captured from the event

sketch.on("create", event => {

   if (event.state === "complete") {
      let graphic = event.graphic
      console.log(graphic) //

}

Re: Invalid Coordinates captured from Sketch widget event

RobertScheitlin__GISP — Mon, 15 Apr 2019 19:51:49 GMT

Dean,

Those coordinates are in WKID 102100, webmercator, not geographic. The sketch will use the WKID of the basemap that is used and if you are using a standard esri basemap then it will always be webmercator. You can easily convert those to geographic using the WebmercatorUtils class though.

Re: Invalid Coordinates captured from Sketch widget event

DeanMcDonald — Mon, 15 Apr 2019 20:01:01 GMT

Thank you! That makes sense and I'm sure I'll have no problems with it now.

Re: Invalid Coordinates captured from Sketch widget event

RobertScheitlin__GISP — Mon, 15 Apr 2019 20:12:04 GMT

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