Coordinate System Issue with Layers Hosted on ArcGIS Online?

[JohanvandenBerg]

Hi,

There seems to be a slight projection diffrence between the hosted and online ESRI versions for e.g. the Western Cape Farm Portions (South Africa)

Please compare:

https://www.arcgis.com/apps/mapviewer/index.html?panel=gallery&suggestField=true&layers=9711ad9affa6...

https://gis.elsenburg.com/apps/cfm/#x=22.21507570&y=-33.39487314&z=17.00&s=4513.99&bm=topo-vector

(Not sure how to add screenshots to posts - Happy to upload them if there is a way)

Thanks,

Johan

[JonathanLebowitz · Accepted solution]

Hi Johan, The Western Cape Farm Portions feature layer hosted in ArcGIS Online appears to be defined in Geographic Coordinate System Cape/WKID 4222, while the Farm Portions layer hosted on ArcGIS Server (11.3) appears to be in Projected Coordinate System WGS 84 Web Mercator/WKID 3857. The layers line up if we remove the Cape To WGS 1984 (1 or 2) transformation from a map in ArcGIS Pro, so one of them is defined incorrectly. Note that a feature layer will publish in the map's coordinate system when published, whether a valid transformation is specified or not.

[JohanvandenBerg]

Thanks Jonathan for checking and confirming. Cape/WKID 4222 is deprecated and indeed not the correct Geographic Coordinate System for the Farm Portions layer. I, incorrectly, assumed that  Farm Portions layer was defined correctly as a few other maps was using this layer ...

Thanks again for your quick replay and checking!