markerset offset

DorothyMortenson1

I have a point dataset. 

I take the exact coordinates of a point and use the following to map it:

var point = new Point({
longitude: long,
latitude: lat
});

var pointGraphic = new Graphic({
geometry: point,
symbol: markerSymbol
});
view.graphics.add(pointGraphic);

The two points do not line up on top of each other like they should (see attached image).

When I do the same thing in ArcMap they do line up exactly.

Capture.PNG

DorothyMortenson1

So this is what I have concluded.

I took three different points that I marked on very distinct features at airports (the tip of the arrow or a cross of some kind).

I projected into the WGS 1984 Web Mercator (auxiliary sphere). While I am in ArcMap, all is well. Points are where they should be.

It's when the data is squeezed through the REST service that it changes the coordinates slightly - but not consistently.

In most cases, it's puts the point about 4 ft off to the south east. I think this is something that would vary around the world.  I remember my coworker mentioning this, but I didn't pay that close of attention.

I had added my service back into an ArcMap file, and the points do not line up.  Same is the case for the Javascript application.  

As Thejus mentioned, when you do a query on the rest service itself and see the coordinates in the results, they are not the same.

I guess this makes sense. I have had a number of attributes go afoul by the rest services, as it seems to have a mind of it's own as far as data types, particularly with long numbers or time.

Thanks for everyone's input.