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the levelling
The precise levelling is a set of mesh of levelling points located along the principal and/or secondary highway network. The precise levelling is composed of:
- Network of order 1 and 2 (distance between marks: 5km);
- Network of complementary order (distance between marks:2km);
- Used material: level NI3 and target plaque with a wire invar;
- 41 494 km of roads and of trails were levelled and materialized by concrete marker.
Medallion of a global levelling of Algeria:
The marks of global levelling of Algeria are materialized by a medallions fixed on a stable supports such as official and administrative buildings, art work, ... These levelling marks (medallions) are located in orthometric altitude with millimetric accuracy.
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Commercial Agency
Palais des expositions, Pins Maritimes, SAFEX - Alger
Phone : +213 23 79 50 25-26
Fax : +213 23 79 50 27
Mobile : 213 670 35 43 81/93
Oran:
Rue Bouamama Ali - Haï El Maquarri - Oran
Phone: +213 41 28 39 39
Fax: +213 41 28 37 37
Ouargla:
Place de L'ALN - Ouargla
Phone: +213 29 76 44 81/82
Fax: +213 29 76 44 80
Constantine:
Zone Industrielle Cité Palma - Constantine
Phone: +213 31 61 63 42/14
Fax: +213 31 61 63 52
