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Time-lapse visualization of city annexations

Check out the time-lapse visualization of city annexations on the County’s GIS Viewer! Watch the growth of cities occur incrementally in LA County.

Expand Political Boundaries > Expand City and County Boundaries > “Turn on” the City Annexations layer and the time-aware slider will appear. All you have to do next is click on the play button on the left-hand side of the slider.

TimeLapse_GISViewer2

TimeLapse_GISViewer37 TimeLapse_GISViewer59 TimeLapse_GISViewer100

There is a 36 year time period when the City of Los Angeles and the next city, Pasadena, became annexed so nothing will occur – be patient until the slider reaches to a time extent of “~37 years, 2 months”.

If you zoom in, you will see the annexation years as labels:

TimeLapse_GISViewer_Labels

Change the transparency on the ‘Political Boundaries’ layer group to view the underlying base map:

TimeLapse_GISViewer_Transparency

Have fun! For more information about the County’s GIS Viewer, click here.

 

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