The Geowork III is the instrument for carrying out the geological map 1:5,000 in urban areas. According to the IDESCAT (2005), over 75% of the Catalan population lives in towns of over 10,000 inhabitants. The characteristics of the land in these urban areas, directly or indirectly affect the lives of all these people and in those who travel for work or other activities. The availability of accurate and quality information on the physical and chemical soil and subsoil facilitates decision-making related to urban planning, because the stability of the ground or surface water drainage, and other natural conditions, depend these geological features.
The geological map of urban areas is a 1:5,000 scale geological map and geothematic applied content that extends over an area of 2,109 km2, an area corresponding to all municipalities of over 10,000 inhabitants, plus the capital district (urban land and land for development, plus a 500-meter contour around and hotspots).
Conceptually, the geological, geotechnical and human activity including the Geological Map of urban zones is 1:5,000 scale, in some respects similar to the type of Geoanthropic map, but the methodology for their production is determined by the particular physical characteristics of highly anthropised areas, which influence the accessibility to the materials making up the soil and subsoil.
The level of detail that provides the scale 1:5,000 makes it particularly suitable for use in the work of urban planning. For the realization of this map is very important collaboration with municipalities, because they provide geotechnical information content, such historical information on the evolution of land use and on issues related to geological processes that have occurred in the historical past in the municipality.