Why are vertices offset in 2d MapView and 3d SceneView?

rhughes522

It appears that the features rendered in the WebView and MapView have a higher max allowable offset than the same features rendered in a web map in AGOL.  The 90 degree angles look good in the 2d api, but when they are drawn in 3d, they turn into non-90 degree angles.

My guess is that the 3D api enforces a higher max-allowable offset which is making the data quality poor.  I am going to try to manually adjust this setting on each layer in the scene, but I am wondering whether this is the correct approach.

Has anyone else run into this issue with shapes being modified in 3d at large scale?

The first image shows the polygons in a web map in AGOL

The second image show the same web map rendered in an Map View on my test connect web server.  As you can tell, there is a major issue happening somewhere

ThomasSolow

Thanks for the information.

I can't replicate this issue, but to summarize what I understand the issue to be:

A large set of polygons viewed from a zoomed out perspective (notice the jagged edge of the polygons, presumably this is just due to pixel size):

Once I zoom in, the edges straighten:

If I take a screenshot right as I zoom in, I can see unstraightened edges before they're redrawn:

This seems to be more or less the issue here: that this process is not working for your geometries and (some) of your polygons are not being redrawn as you zoom in and out.

As to why that's happening, I'm still fairly clueless.  It could be a setting on your feature service I suppose, something like "maxAllowableOffset" as you mentioned.   So playing with that setting might be worthwhile, although you may have already tried that.

The fact that you mention this issue is worse for larger numbers of polygons makes me think that this may not be the issue though.  I'll keep playing around with this though.