Sixty-year history of Town and Country Planning in the world, raised a fundamental question: why following the successful models in the process of Town and Country Planning don’t have always similar results? Whether, the origin of differences and ambiguities are not in the boundaries, interrelation among the levels of decision making, policy making, uncontrollable democracy in land ownership, irrational use of land, programs instability and lack of appropriate development patterns, irrational zoning, or in a word in the execution of land administration? The principle aim of this research is to evaluate the role and importance of land administration in the realization of goals and programs to improve Town and Country Planning. In this study we have used mainly descriptive and analytical methods, we have found to the conclusion that the land administration is the most fundamental precondition for implement policies, plans and programs in Town and Country Planning, at the extend of territory. The experiences which has been obtained from the leading countries in the field of Town and Country Planning, also shows that land administration and its role is very important, because that, independent of the all way views and of the pre-determined policy, it depends, before anything, else on how to managing, planning and land use, as the most important actions and evolutions of the Town and Country Planning.

Many plans, programs and techniques of town and country planning has been used in an irregular and dispersed manner from the beginning of human apparition civilization up to modern times, without citing this concept. But based on the most specialists, the France was the first country which founded the scientific and academic paradigm of town and country planning in the world. Study and analysis of 50 years experiences in France can help efficiently the countries which are still at the beginning of this way or the countries that are in the very first stages. The main purpose of this article is to review and analyze the historical trend of the evaluations of town and country planning in France. In this research we have used historical case study method to describe and analyze the general status, plans, policies and programs that have been used up to now. The data has been collected by using different sources like official reports of DATAR in France and other books and articles in this area. At the end, based on a comparative study, we will try to give some suggestions for developing the town and country planning in Iran.

Planners always face a set of spatial conflicts in allocation of land to a particular activity; this implies that a land may be used for two or more parallel applications. Currently in Town and Country Planning programs recognizing priorities in the land allocation process are modeled independently without considering the role of other land uses, and as potential land-use conflicts are an issue that has been ignored. The purpose of this study is to introduce and use the LUCIS model to identify land allocation priorities along with conflict modeling. To implement the model, with using the Python programming language an ArcGIS toolbox has been developed. Due to the developed system, defining inputs, weights and stakeholder priorities, land use modeling will be done automatically. Finally, priorities and also major conflicts in the study area have been identified. Results of this study show that, in addition to having the capabilities of other models in land suitability analysis, LUCIS can properly model existing conflicts. Therefore, it is recommended that a separate part under title "Identification of land suitability conflicts"  be specified in the descriptive setting of Town and Country Planning programs.