Editing Plan position indicator (section)

{{Short description|Radar sweep display}}
[[Image:Sturmfront auf Doppler-Radar-Schirm.jpg|thumb|Image of a thunderstorm line (in dBZ) seen on a 0.7-degree elevation PPI ([[NOAA]])]]
[[Image:Radar-angles.png|thumb|Diagram showing the evolution of the height above ground, in kilometers, with the distance to the radar for the 24 PPI angles used on the Canadian [[weather radar]]s (curved lines)]]

A '''plan position indicator''' ('''PPI''') is a type of [[radar display]] that represents the radar antenna in the center of the display, with the distance from it and height above ground drawn as [[concentric]] circles. As the radar antenna rotates, a radial trace on the PPI sweeps in unison with it about the center point. It is the most common type of radar display.