Features move 3 feet when shared to ArcGIS Online, does not retain original location

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12-08-2021 06:40 AM
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AlexanderLynch2
New Contributor III

I have a GDB set in local coordinate system on ArcGIS Pro map. I then shared map to ArcGIS online [reprojected to Spherical Mercator] and turn on feature editor tracking and sync. Next, I imported original GDB and ArcGIS Online Services URL to data warehouse [FME]. Manipulated coordinate system to match and compared geometry of same feature. It resulted with NW shift of 3 feet. When surveying centimeter-grade, this shift is unacceptable.

Is there a best practice to retain feature's original geometry when sharing to ArcGIS Online then back to GDB???

 

Image below:
ArcGIS Online Features -- brownish-red line and point
File GDB Features -- green line and point

 

3 Replies
Peter_Klingman
Esri Regular Contributor

Hi @AlexanderLynch2 thanks for this post. If I'm understanding this right, you're comparing the location of points from the following two workflows:

  • Published hosted feature layer from ArcGIS Pro
  • Original FGDB
    • You're comparing the hosted feature layer published from Pro to the original FGDB and noticing the discrepancy of three feet.  
    • Is this right or am I misinterpreting/missing something here?

We would like to get this to a Support analyst to take a closer look at the data and workflow involved. Let me know and I can get a case going for you. In the meantime, would you be able to attach a zipped file geodatabase with some sample data?

Thanks,

-Peter 

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AlexanderLynch2
New Contributor III

Yes. You are correct. But rather than publishing hosted feature layer, I share as a "web map". Even when comparing on ArcGIS Pro: Vertex x & y are not same.

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Peter_Klingman
Esri Regular Contributor

Hi @AlexanderLynch2 - sorry for the delay in getting back to you on this. Thank you for including the sample data - I haven't been able to reproduce this issue. Please see my steps below and let me know what I need to alter to see the issue. Alternatively, I can get a Support case started for you and an analyst can test the workflow and data extensively. 

  • Add layers from GDB to new map in ArcGIS Pro 2.9
  • Change projection of map to Web Mercator (layers projected on the fly from local projection to Web Mercator)
  • Publish web map from ArcGIS Pro
  • From Portal section in Catalog pane, open up the newly published hosted feature layer. 
  • Add it to ArcGIS Pro and compare to the features in the File Geodatabase. 
  • When viewing in Web Mercator or the File Geodatabase projection, the features are in the exact same place. 

 

Thanks,

-Peter 

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