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Table 2 Summary of planning zones in Marion County, Indiana

From: Investigating important urban characteristics in the formation of urban heat islands: a machine learning approach

Planning zone

Zoning district

Description

CBD

Central Business District one

Central Business District two

Central Business District three

The area containing the general downtown area

This planning zone represents the typical urban core of Indianapolis to be developed at very high density

Maximum lot coverage: 100%

Commercial

Office buffer district

Neighborhood commercial district

Community regional district

General commercial district

High-intensity commercial district

Special commercial district

This planning zone provides a freestanding area that office use, compatible office type uses such as medical and dental facilities, education service, public and semipublic uses, and an extensive range of retail sales and personal, professional, business services, regional size shopping center, and retail services and services functions whose operations are typically characterized by automobiles, outdoor display, sales of merchandise, major outdoor storage or display of sizable merchandise

The maximum height of buildings and structure: ranges from 38 to 65 ft.

Urban dwelling

Dwelling district 3–11

Planning unit development district (PUD)

This planning zone provides for low, medium, or high-density residential development including single family detached dwelling, single-family attached dwelling, two families attached dwelling, multifamily dwelling, triplex, fourplex, high-rise apartment, and mobile dwelling

The maximum height of the primary building: ranges from 35 ft. to unlimited (24+ stories)

Minimum open spaces: ranges from 70 to 8%

Suburban dwelling

Dwelling suburban district

Dwelling district one

Dwelling district two

This planning zone is intended for suburban areas to permit low to minimum density residential development

Minimum lot area, single family: 15,000 ft.2, two family: 20,000 ft.2

Minimum open space: 75%

The maximum height of the primary building: 35 ft.

Minimum main floor area: 1200 ft.2

Agricultural dwelling

Dwelling agricultural district

This planning zone holds the agricultural lands of Marion County and provides for a variety of agricultural uses

A single-family dwelling is intended to be permitted as a part of such agricultural uses

Minimum lot area: 3 acres

Minimum open space: 85%

The maximum height of the primary building: 35 ft.

Minimum main floor area: 1200 ft.2

Industrial urban

Light industrial urban

Medium industrial urban

Heavy industrial urban

Restricted industrial urban

This planning zone permits an industrial park land use in urban area to prevent objectionable characteristics and possibly harmful activities from the lot lines

Light industrial area is used as a buffer zone between the more intense industrial district and protected district such as a dwelling, park, hospital, or school

Industrial suburban

Light industrial suburban

Medium industrial suburban

Heavy industrial suburban

Restricted industrial suburban

This planning zone permits an industrial park land use in suburban area to prevent objectionable characteristics and possibly harmful activities from the lot lines

Light industrial area is used as a buffer zone between the more intense industrial district and protected district such as a dwelling, park, hospital, or school

Mixed use

Mixed use one district

Mixed use two district

Mixed use three district

Mixed use four district

This planning zone includes the development of high-rise office uses and apartment intermix, a mix of residential uses, office, personal services, retail, and eating and drinking businesses, a compact, mixed-use village development comprised of moderate and high-density housing

The height of the building: ranges from 18 ft. to unlimited