Tried Repair Geometry, didn't fix issue. Ran the tool, no error messages, acted like it didn't find anything wrong, it says it succeeded in the messages. To answer your questions: Zooming past 1:1, no. Some lines disappear at 1:30,000, sometimes at 1:25,000, others disappear at 1:10,000. It's not happening to all of the lines, just to about 10%. The Coordinate system is NAD 83 State Plane Maryland FIPS 1900 (US Feet). Are they projected properly, don't know. This data is the County;s parcel dataset. It was constructed by a consultant back in 2012, and I have been updating the data ever since as new plat data comes into the County. I use COGO to place most new parcel lines, and I build parcel polygons using the build polygons tool. The Softline feature set that is having the problem is used for old parcel lines, easement lines, misc lines. The softlines most of the time are copied parcel lines pasted into the Softline feature set, and sometimes they are drawn in. I've added over 4,000 lines to the Softline dataset since I started updating the data, and it appears that most of my lines are having the issue. I haven't noticed any problems with the data until now. The feature dataset contains a Topology, 2 line features, 2 point features, an annotation feature, and 2 polygon features.
