The urban form of the built environment is the core element of this article. Two approaches have been developed to deal with it, firstly, a criticism of the urban form as a result of the town planning instrument and secondly a proposal to structure the urban form for Plan Regulador Comunal. Given that a cartographic model is showed as an example to deal with relevant issues in relation to the urban form. The model tries to give a methodological guide to the urban planners and managers.