The Denver view plane ordinances preserve and protect views from various parks and public places by limiting building height.
Denver's view planes were established in Chapter 10 of the Denver Revised Municipal Code:
View an illustrated example of a view plane's effect on building height(PDF, 489KB).
The file above contains an illustrated example of a view plane and how it limits building height. The building height limitations depend on the distance from a reference point, usually with increased height allowed as the building is located farther from the reference point. The reference point is measured as elevation above mean sea level.
As you consider this example, keep in mind that the maximum building height for your location is given as elevation relative to a fixed standard, mean sea level. Actual building heights would vary depending on adjustments in the finished grade on which the buildings are located, and no part can project up into the defined view plane. This applies even in cases where a building straddles an elevation. Any part of a structure that is within the view plane is subject by the limitation on construction height.