What exactly is an 'Inferred Feature'?
We are running OCM (former Bentley Map and Microstation Connect).
We have recently transformed our GDA94 database and our GDA94 CAD files independently to GDA2020 (using the two step method for CAD files)
Now, when by querying the data base in OCM (GDA2020) and referencing transformed CAD files (GDA2020), some data does not overlay.
There is a shift, approximately 1.4M between two respective points.
Global origins have been checked in all seed files; after extensive testing,
it seems that 'Inferred features' in a CAD file, are not transformed from GDA94 to GDA2020, using the two step method.
Is anyone else experiencing a similar issue in OCM?
Refer to https://communities.bentley.com/products/geospatial/desktop/f/bentley-map-forum/174192/new-gda2020-geocoordinate-systems-in-ce---how-does-it-work/502745#502745
The 1.4 meter difference appears consistent with the wrong version of GDA94 being used prior to reprojection.
Hi Alan, we have been using MGA94-56 - Map Grid of Australia Zone 56 (GDA94) for many years.
The two step transformation to GDA2020 involves one correction (MGA94/GSB-56 - Map Grid of Australia Zone 56 (GDA94 NTv2to GDA2020), followed by one re-projection. The same method as outlined in the linked information.