It can not be said that any definite set of principles for city planning has yet been formulated. Discovering the economic, social and physical condition begins with the survey of the city. In the process of doing so it should deal with topographical conditions particularly in relation to industry, transportation, climatic and soil conditions and other natural features. Difference in city planning is the result not so much of the size but that of function, that is, whether they are industrial, business or recreational.

The chief pitfalls in planning probably lie in two directions. The first of these is that of making city planning a mere branch of the real estate business and of seeking the stability of real estate values as its main objective.

The second pitfall is the expenditure of money on extravagant improvements and on schemes of ornamentation of the city while public health and living condition are neglected.