Issue 

Some datasets from SLIP’s location data services may not work completely in ArcGIS Portal and ArcGIS Online.  

Affects 

ArcGIS Portal 10.3.1 and ArcGIS Online (AGOL) when data is projected/ transformed on the fly.  

eg. zoom to feature and highlight feature functions in portal web map apps and geoprocessing services do not work as expected if the data doesn’t match the map’s coordinate system. 

Description 

The standard coordinate system used when publishing SLIP data services is EPSG 3857 => WGS84 Web Mercator (auxiliary sphere), the standard for sharing data on the web. 

WA Now Esri Map and Image services are published as GDA94 4283 because the imagery is stored in GDA94. 

It is best practice to have data (layers) and map (data service) both using the same coordinate system. This avoids the extra overhead required to project/ transform data on the fly. This is especially important for features with lots of vertices. 

Most data in the new SLIP system is stored as WGS84 for that reason, however data sourced from Landgate databases including imagery is still stored as GDA94 and on-the-fly projection is used.  

Esri Bug Record: BUG-000087130 

SLIP Problem Record: PRB0013069  

Workaround 

N/A