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I need some help finding circle shapefiles (polygons) within a database, something like tanks and silos, but they weren't classified right in OSM so looking for attributes won't help (doh!).

Is there anyway to select circles in ArcGIS or QGIS?

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    Welcome to GIS SE! As a new user please take the tour to learn about our focused Question and Answer format. By asking about both ArcGIS and QGIS this makes the question too broad - please edit your question to focus on one GIS software. If you are after answers for both please put the other in a separate question.
    – Midavalo
    Feb 8 '17 at 16:28
  • Are you trying to create circle features or differentiate circles from other shapes?
    – Ryan
    Feb 8 '17 at 16:31
  • If you are typing to identify circle-shaped geometries, that is a very different task than locating shapefiles in a database (once loaded, the data from a shapefile is no longer a shapefile). This is probably also relevant: gis.stackexchange.com/questions/73362/…
    – Vince
    Feb 9 '17 at 2:17
  • Hi Vince and FelixIP. Thanks for your comments. I am trying to differentiate circles from other shapes. Yes, I am trying to identify circle-shaped geometries. I have loaded shape files into arcmap and there are thousands of shapes, squares, but I would like to identify circles so I can attribute them as tanks.
    – L.Chant
    Feb 9 '17 at 19:09