Question

Can FME find the differences or similarities in geometries between two data sets ?

  • 28 July 2021
  • 2 replies
  • 12 views

Hello !

I'm completely blocked in finding a solution to be able to do the quality control of data. I have an autocad file in reader which I've transformed in GML and Esri Shapefile in writers. Now I have to do a quality control to know if there is missing lines, curves or areas in the final datas compared to the initial DWG file. Actually, it happens to have few missing elements in my transformed data. I've used change detector, matcher, spatial filter, but no successful result. Can FME perfom such control on two data sets to identify missing elements or disparities ?  

Thank you.


2 replies

Badge +3

make sure they're in the same coordinate system before comparing geometry. https://www.safe.com/blog/2014/11/data-quality-checklist/

you can also use link above to access FME's ultimate geospatial data validation checklist

Userlevel 5
Badge +29

make sure they're in the same coordinate system before comparing geometry. https://www.safe.com/blog/2014/11/data-quality-checklist/

you can also use link above to access FME's ultimate geospatial data validation checklist

In addition to this, you may need to play with the tolerances in the transformer. Whilst it may appear the same, the vertices may be slightly different or the order of vertices in lines/polys may be different as well

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