For the purpose of regulating and restricting the erection, construction, reconstruction, alteration or use of buildings, structures or land and regulating and restricting the location of trades and industries, and the location and design of buildings for specific purposes, and to regulate and limit the height and bulk of buildings, and the area of yards and other open spaces, and to regulate and limit the intensity of the use of the lot areas, the City is hereby divided into districts as follows:
1. Agricultural District.
District "A-1" — Agricultural Activities
2. Residential Districts
District "R-1" — One-Family Dwelling District
District "R-2" — One-Family Dwelling District
District "R-3" — Two-Family Dwelling District
District "R-4" — Multiple-Family District
3. Commercial and Office Districts.
District "C-1" — Office and Professional District
District "C-2" — Downtown Commercial District
District "C-3" — General Commercial District
4. Industrial Districts.
District "M-1" — Light Manufacturing District
District "M-2" — General Manufacturing
5. Overlay Districts.
District "PUD" — Planned Unit Development
District "FP" — Flood Plain District