||Can ArcSDE read and write SDO optimized circles (SDO_ETYPE 1003, interpretation 4)? ESRI Technical Article 20277 states that it can. However, I am unable to view the feature in ArcMap, in fact the geometry seems to corrupt the entire feature class. I query the geometry field of the circle feature with the SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT and get a response of true. Also I am able to select features from another table with the sdo_anyinteract operator. So I believe the geometry is valid as far as Oracle is concerned.