A plot plan, survey or diagram of the subject premises accurately showing the dimensions of all actual or proposed structures on the subject premises, the distances of all actual or proposed side yards, rear yards, front yards, courts, driveways, abutting streets and, except for appeals involving court areas or locations, the distance from the side and rear lot lines to existing structures, if any, on adjoining properties closer than 300 feet to said lot lines. If such an appeal is based upon practical difficulties arising out of topographical conditions, such as differences in elevation, streams or outcropping of rocks or the like, the plot plan or survey should sufficiently indicate the nature and extent of said conditions.