In order to classify, regulate and restrict the location of trades and industries and buildings designed for specific uses, to regulate and limit the intensity of the use of lot areas, and to regulate and determine the areas of yards and other open spaces surrounding such buildings, the City is hereby divided into classes or "districts." The districts shall be known as:
1.
"AG" Agricultural District.
2.
"R1" Residential District (Low-Density).
3.
"R2" Residential District (High-Density).
4.
"R3" Residential District (Trailers).
5.
"C1" Commercial District.