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Thursday, April 24, 2025

The Third Dimension of City Planning, Zoning, and Urban Design

 


We can no longer depend on city planning master plans; zoning maps based on compatibility assumptions; and the belief that there is an unlimited Natural Domain available for annexation and consumption by the Built Domain. Weak assumptions and conflicting, uncorrelated regulations will remain a function of inertia until shelter sprawl, annexation, and excessive intensity are recognized as physical threats to our survival. It is not enough to recognize a threat, however. It must be met with an urban design strategy of equal magnitude involving the new tools and leadership correlation required to protect growing population activity with symbiotic shelter solutions in geographic areas scientifically limited to protect their quality and source of life, the Natural Domain.

Expanding the scope of attention to ensure that shelter remains an essential element and not a threat to survival will require a new strategy to achieve greater political credibility. This will depend on an expanded vision of the information-sharing, data science, relational databases, and geographic information analysis required for shelter capacity prediction, measurement, evaluation, and collaborative correlation in the search for knowledge that can help us learn to live within geographic limits.

(Shelter capacity is gross building area in sq. ft. (GBA) divided by the project buildable land area in acres. Gross building area potential on a given buildable land area, for the building design category (G1), is:

GBA = ((af) / (a+(fs))) * CORE

The G1 design category includes all buildings served by adjacent surface parking on the same lot, parcel, or land area. The square feet of gross building area planned or permitted per parking space is represented in the equation by (a). The square feet of parking area planned or permitted per parking space is represented by (s). Floor quantity (f) in the equation is the third dimension of city planning and zoning. I have discussed the derivation of CORE area from a standard set of design specification topics and value choices in numerous essays and will not repeat myself here. For the purposes of this discussion, CORE area is the project area remaining for primary building cover and parking cover after all other site improvement and open space areas are subtracted from the total project area.)

Urban design tools, and the information they provide, are needed to build convincing knowledge and arguments regarding land consumption, shelter capacity, spatial context; and the social, psychological, environmental, and economic implications of shelter aggregation choices. These choices involve building design categories, design specification values, floor quantity choices, and category master equations. They produce shelter options that are served by a city’s movement, open space, and life support systems. These are the four divisions that combine to form the currently parasitic urban and rural phyla of the Built Domain.

Architectural education teaches the formation of shelter space, form, function, and appearance needed to organize spaces that serve client activity and accommodate the essential engineering systems required on a given land area. This is the mental process of information-gathering, logical evaluation, and creative correlation that produces strategic options requiring leadership choices. It is the first milestone in architectural education, but the appropriate consumption of land is rarely considered. It is simply included as part of the problem to be solved, and the quantity is not tailored to either demand or capacity. Waste and/or excessive intensity is inevitable as the architectural strategy focuses on the internal success and external appearance of shelter while site planning deals with the land remaining.

We live with land surveys that do not accurately calculate the spectrum of shelter capacity alternatives available. They define an area, or quantity, that is considered a commodity for sale and use. The concept of shelter capacity evaluation considers a defined land area to be a unit in a city’s investment portfolio whose shelter capacity, intensity and activity options have revenue and investment potential that can be calculated. This unit potential combines to establish a city’s financial stability and affordable quality of life, but the ability to measure, forecast, evaluate, and adjust unit potential throughout a city’s land portfolio awaits the introduction of information-sharing systems and shelter capacity evaluation algorithms that are currently academic proposals.

The lack of mathematical urban/city design evaluation has led to city budgets based on history and future projections unable to accurately evaluate the total average annual revenue per acre that can be produced to balance the total average annual expense per acre needed to maintain and improve its desired quality of life.

Urban design expands the architectural universe of strategic evaluation. It is concerned with the formation, impact, impression and spatial context of places formed by the aggregation of shelter mass, shelter capacity, intensity, activity, movement, open space, and life support because these compositions affect a population’s physical, social, psychological, environmental, and economic quality of life. The goal is to limit the consumption of land for these places within a scientifically prescribed Built Domain defined to protect our quality and source of life. The political implications of the challenge are obvious, and the credibility required to lead will be no less than that needed to establish city planning, zoning, and building regulations in the 20th century.

The relationship between land consumption and shelter capacity, intensity, and activity options has public revenue potential per acre that can be calculated. It may be the strongest argument for increasing research and knowledge regarding shelter capacity relationships that produce desirable places for people; since they can also produce revenue, financial stability, and an affordable quality of life within limited areas when consciously and mathematically organized.

Shelter capacity is a function of a given buildable land area, building design category decision, master equation, and choices regarding design specification values and floor quantity options. These decisions produce levels of measurable capacity, intensity and context that are occupied by activity. Shelter capacity, intensity, activity, and context decisions have mathematical relationships that can be used to balance the revenue potential of parcels across larger municipal land areas. These are the predictions that can establish the credibility of urban design recommendations. Their social, psychological, and environmental implications will require longer term research correlated with the conclusions from many related professions.

Walter M. Hosack, April 2025


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