The "population center" is a statistical construct that designates the midpoint where the Northern and Southern California populations are equally balanced on either side. For the first time in a century, that midpoint has moved northward.
The population center lands in Kern County, 1.7 miles northeast of its previous location. The new spot indicates that the population of Northern California is growing faster than Southern California. The population center is an important bit of data, because in the past it helped determine the location of the state capital:
"When politicians chose Vallejo as the state capital, then later moved it to Benicia and ultimately Sacramento, the center of California's political power was never far from what the U.S. Census Bureau calls the mean center of population. Demographers pin the point with a formula involving latitude, longitude and the weighted population of each of the state's 710,000 census blocks."
FULL STORY: California's population center is in an alfalfa field

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Op-Ed: Why an Effective Passenger Rail Network Needs Government Involvement
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Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
New York City School Construction Authority
Village of Glen Ellyn
Central Transportation Planning Staff/Boston Region MPO
Institute for Housing and Urban Development Studies (IHS)
City of Grandview
Harvard GSD Executive Education
Regional Transportation Commission of Southern Nevada
Toledo-Lucas County Plan Commissions