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Berlin Environmental Atlas

01.08 Terrain Elevations (Edition 2010)

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Statistical Base

Digital terrain modelling (DTM), together with digital surface modelling (DSM) and digital orthophotography (DOP), is among the most important products of topography. These procedures are integral parts of the German Official Topographical Cartographical Information System (ATKIS), and are used variously in all areas of geodesy, geology, urban planning, architecture and environmental protection.

At the turn of the year 2007-'08, in the context of a project by the Department of Economics for the construction of a virtual city model of Berlin, an extensive elevation data stock was compiled. By means of an aerial laser-scan measurement project and the ensuing classification of the data, a total of some 5.7 billion points of the terrain surface were ascertained, an average of 5 points per sqm.

Based on this data stock, a derivation of a terrain model was established for the entire area of the state at the end of 2008. The result was a uniform point grid with a grid interval of 1 m (approx. 1 billion points). After qualitative and quantitative checks, an average elevation precision of +/- 20 cm was ascertained. This corresponded to the technological possibilities of the data gathering method, and the nationally uniform stipulations of the Cadastral and Surveying Authorities of the German States (AdV), which applies to a model with a grid interval of 2 m (DTM2).

At the beginning of 2009, a data bank was established for the submission and derivation of elevation information. At present, terrain models with a wide variety of grid intervals can be generated from this data bank, and made available to the user via the reference systems Soldner Netz88 and ETRS89/UTM33. See the following link for the various terrain models and their submission conditions:

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