CEVA – Provision of basic files

CEVA, an acronym for Cornavin - Eaux-Vives - Annemasse, is a large-scale railway network, responding to the development and growth challenges of the canton of Geneva. By connecting the two banks of the canton together, but also the existing networks, it facilitates the movement of people and strengthens the economic attractiveness of the entire region. Thanks to the Franco-Valdo-Genevois regional express network and connections with other means of public transport, CEVA is today a real alternative to the automobile. It provides a practical and ecological response to urban travel problems and thus significantly improves the quality of life of its users and all residents of the Geneva area.

SPATIAL SA has been mandated to provide, to all project agents, all the cadastral and altimetric bases of the canton of Geneva necessary for the execution project, namely: cadastral funds, contour lines, digital terrain model, digital surface model.

SPATIAL SA has guaranteed the compatibility of the data provided with all the graphics systems used by CEVA agents. To do this, the cantonal databases were “purified” to provide DWG files composed of elementary objects, lines, arcs and texts, in a reference frame resulting from a translation of the Swiss national system into local coordinates.

SPATIAL SA has notably developed filter tools to extract data in the form of a long profile from the "grid" of the cantonal Digital Altimeter Model (several hundred million points). This lightweight data is compatible with all standard CAD graphics stations on the market, and particularly useful for preliminary projects.

SPATIAL SA has also actively participated in the issue of coordinate systems, which are different in Switzerland and France. The differences were compensated after the Moillesullaz border in a straight linear part of the route.