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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