topic Generalized/triangulated polygons in ArcGIS Online Questions

Generalized/triangulated polygons

PJNabors — Tue, 03 Jul 2012 19:09:06 GMT

Has anyone else noticed that occasionally when zooming in, the polygons stay generalized even after zooming much closer? Each polygon may only have 3 vertices instead of 30 or so they are supposed to have?
Only occasionally see it so don't have a snapshot to show you yet.

Re: Generalized/triangulated polygons

JasonBalmut — Tue, 03 Jul 2012 22:48:27 GMT

Yes, I think we are seeing something similar. When zooming in and out we are seeing the angles on polygons change slightly. In these screenshots you can see the corner circled in red go from an obtuse angle to a right angle.

[ATTACH=CONFIG]15748[/ATTACH] Small scale

[ATTACH=CONFIG]15749[/ATTACH] Large scale

Is that the same phenomenon you're seeing or is it something different entirely?

Re: Generalized/triangulated polygons

PJNabors — Fri, 06 Jul 2012 18:56:03 GMT

Ours is much worse. You would only see a triangle instead. The entire shape changes.

Re: Generalized/triangulated polygons

PJNabors — Mon, 09 Jul 2012 20:12:43 GMT

Here is an example of what happens sometimes when I zoom in:

In this case, I zoomed out and then back in to get it back to the original linework.

Re: Generalized/triangulated polygons

PJNabors — Tue, 10 Jul 2012 13:28:58 GMT

I am now able to repeat the error!
http://tva.maps.arcgis.com/apps/OnePane/basicviewer/index.html?appid=7018cefe542d4146847e45f3e75b7ce4

Wait for the polygons to finish drawing. Click on the first purple polygon south of Murfreesboro, TN (southeast of Nashville).
The polygon will be highlighted and pop-up will come up with the attribute info.
Click 'Zoom to' (lower left of pop-up window). You will see the generalized/triangulated polygon picture that I posted for Normandy.
Any help appreciated!
Even if we could disable the Zoom to feature, that would be fine just so we can finally get this rolled out.
PJ

Re: Generalized/triangulated polygons

MikeMinami — Tue, 10 Jul 2012 20:12:59 GMT

Thanks, this is a bug. The Zoom To causes the features to be drawn at the zoomed out scale (also if you click the "X" to close the popup). Just click once on the map, then zoom in/out again and the features will draw correctly.

Thanks,

Mike

Re: Generalized/triangulated polygons

PJNabors — Wed, 11 Jul 2012 13:59:37 GMT

Thank you. When do you estimate this bug to be fixed?
(although rare, sometimes it does get stuck and you have to restart the map)

Since this is keeping us from finally rolling our map out to the public we are disabling the pop-up windows until it gets fixed. Is there a bug fix number I could track?

Thanks!
PJ

Re: Generalized/triangulated polygons

MikeMinami — Wed, 11 Jul 2012 14:26:16 GMT

Here's a tracking number: NIM082633

This issue is in our JavaScript API. The next scheduled update is November, so I'll put it on track for then.

Thanks,

Mike

Re: Generalized/triangulated polygons

PJNabors — Wed, 11 Jul 2012 19:00:14 GMT

Thanks you very much.

Re: Generalized/triangulated polygons

SudhirPonnappan — Mon, 02 Jun 2014 16:42:13 GMT

Has this been fixed?
Any suggested work around?