The present work presents a proposed comparative study of three of geomorphological maps used in different projects of environmental zoning accomplished in Brazil starting from the decade of 90.

With the retaking of the process of regional planning of vast portions of the Brazilian territory located in the areas Center-West and North, the geomorphological studies has composed part of the ecological diagnoses, intermediary phase in this planning process, executing preponderant paper in the natural environmental units definition.

The conceptual base for such projects was given starting from the Environmental Diagnosis of Legal Amazônia that it contemplated a series of rising of the landscape, embracing geological, geomorphological and pedologic studies. In this work the first conceptual and methodological geomorphologic bases were thrown regarding the diagnosis to be implemented in the regional works of zoning.