Types of Zoning Codes. There are two main approaches to contemporary zoning: Euclidean Zoning Codes and Form-Based Zoning Codes. These two approaches create different patterns of development/results based on their goals. Our current zoning code is a Euclidean code, Miami 21 is a Form-Based code. Euclidean Zoning Codes Form-Based Zoning Codes. A type of zoning named for the Village of Euclid, Ohio where. zoning was upheld in 1926 as a legitimate governmental power. These codes are characterized by establishing and regulating. land based on use. Typical types of land-use districts in. Euclidean zoning are: residential, commercial, institutional, and.