The last example of non-temporal cartographic animation depicts a spatial trend. The objective of this type of animation is to show the relationship of a series of related variables. The maps show census tract data of age of population for Omaha, Nebraska. Younger people tend to live in the western parts of the city while the older population tends to remain in the eastern parts of the city. The animation depicts this distribution of age groups as a 'wave' between the eastern and western parts of the city.
Temporal animations show change over time and can also be created with the program.
An example of a temporal animation is the change in the use of irrigation in Nebraska in the 33 year time span between 1954 and 1987. In the 1950's, irrigation was mostly used in the western counties. During the late 1960's and 1970's, irrigation was expanded in the central part of the state. Clicking on the illustration below will activate the associated map display implemented in JavaScript. Clicking on the illustration below will activate the associated map display implemented in JavaScript.