Rectangle polygons turn into triangles in AGO

deleted-user-Xsrs0JV1qWKH · ‎05-15-2018

I am bringing in polygons for a cemetery into AGO - they turn into triangles... any idea why? They are all have only 4-vertices - pictures below. Thanks - Dan

DanPatterson_Retired · ‎05-15-2018

Run a Check Geometry on your file. Although a rectangle looks like it only has 4 points, it should have 5 with the first and the last being duplicates.

deleted-user-Xsrs0JV1qWKH · ‎05-16-2018

I ran the check geometry tool, no results. I also spot-checked my polygons in Desktop, and they only have 4 vertices for each corner.

DanPatterson_Retired · ‎05-16-2018

Check is good. You won't 'see' more than 4 points, but since check is ok, then it might be a projection issue. Web Mercator?

deleted-user-Xsrs0JV1qWKH · ‎05-16-2018

The projection of my original data is not in WGS 1984 Web Mercator (Auxiliary Sphere) as I know AGO is by default. But, upon changing my data's projection to that, 1. I still get the same result, and 2. The data lands in the middle of Africa now... AGO takes my original projection (StatePlane) and puts it exactly where it needs to be, and always has - so I don't think it's a projection issue.

DanPatterson_Retired · ‎05-16-2018

Kelly Gerrow‌

Kelly can you figure this one out? I suspect it has to do with the Projecting the data or with AGOL and a geometry issue

Thanks Dan

KellyGerrow · ‎05-16-2018

I've never seen this before. Dan Rose, can you share the data or the web map or get in contact with support? I also suspect that this has something to do with the projection or transformation but won't be able to fully identify the issue without seeing the data.

Here is a blog by Paul Barker‌ about setting transformations in ArcGIS Online. This may get you on the right path. https://www.esri.com/arcgis-blog/products/arcgis-online/uncategorized/taking-control-of-transformati...

-Kelly

deleted-user-Xsrs0JV1qWKH · ‎05-17-2018

Hi Kelly - thank you for the reply. I've also had a circle polygon turn into a square/diamond in another app - same .mxd. Since this is not an official/released web map yet, I'd rather connect with you via email.

DanPatterson_Retired · ‎05-17-2018

I hope you are creating the geometry in either ArcMap or ArcGIS Pro... sounds like a geometry issue if all shapes are going weird

deleted-user-Xsrs0JV1qWKH · ‎05-17-2018

Yes, everything was created in ArcGIS, 10.3.1.