The subdivision of land is the first step in the process of urban development. The arrangement of land parcels in the community for residential, commercial, and industrial uses and for streets, alleys, schools, parks and other public purposes will determine, to a large degree, the conditions of health, safety, economy and amenity that prevail in the urban area. The quality of these conditions is of public interest. This title establishes provisions for adequate light, air, open spaces, drainage, transportation, public utilities and other needs to ensure the development and maintenance of a healthy, attractive and efficient community that provides for the conservation and protection of its human and natural resources. (2011 Code app. § 1)