There was a change to the TERPS criteria in 2012 that affects circling area dimension by expanding the areas to provide  improved obstacle protection. To indicate that the new criteria had been applied to a given procedure, a   is placed on  the circling line of minimums. The new circling tables and explanatory information is located in the Legend of the TPP. The approaches using standard circling approach areas can be identified by the absence of the   on the circling line of  minima. The airport sketch is a depiction of the airport with emphasis on runway pattern and related  information, positioned in either the lower left or lower right corner of the chart to aid pi- lot recognition of the airport from the air and to provide some information to aid on ground  navigation of the airport. The runways are drawn to scale and oriented to true north. Runway  dimensions (length and width) are shown for all active runways. Runway(s) are depicted based on what type and construction of the runway. Taxiways and aprons are shaded grey. Other runway features that may be shown are runway numbers, runway dimen- sions, runway slope, arresting gear, and displaced threshold. Other information concerning lighting, final approach bearings, airport beacon, obstacles, control tower, NAVAIDs, heli - pads may also be shown. The airport elevation is shown enclosed within a box in the upper left corner of the sketch box and the touchdown zone  elevation (TDZE) is shown in the upper right corner of the sketch box. The airport elevation is the highest point of an  airport’s usable runways measured in feet from mean sea level. The TDZE is the highest elevation in the first 3,000 feet of  the landing surface. Circling only approaches will not show a TDZE. 114 FAA Chart Users’ Guide - Terminal Procedures Publication (TPP) - Terms Airport Elevation and Touchdown Zone Elevation AIRPORT SKETCH Circling Minimums Apply Standard Circling Approach Maneuvering Radius Table Apply Expanded Circling Approach Maneuvering Airspace Radius  Table Hard Surface Other Than  Hard Surface Metal Surface Closed Runway Under Construction Stopways,  Taxiways, Park- ing Areas Displaced  Threshold Closed Pavement Water Runway