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Sections of Series 25 are first carried out by digital or analytical stereo-restitution and after automatically or manually drawn. Sections of Series 25DB are carried out by digital stereo-restitution or from Regional Technical Numerical Cartography derivation.
Both series are printed in 4 colours.

The “Topographic Map of Italy” at scale 1:25.000 consists of 2 different series: Series 25 for sections published until the end of the 90s and Series 25DB for sections published later. Roads, populated places, technological networks, vegetation, hydrography and relief are indicated. Relief is indicated by contours at 25 m intervals, with shading. International and administrative (Region, Province and Municipality) boundaries are delineated. Roads are classified according to the road-bed nature and to the width. Woods: symbols of trees are in black over green filling.

6’N-S by 10’ E-W
Mean coverage 150 sq. Km.

ELEMENTS OF THE SERIES

2.298 Sections;
1140 available, 300 of which belonging to Series 25DB.

Geodetic Reference System for Series 25 is Hayford ellipsoid - European mean orientation.
Geodetic Reference System for Series 25DB is ETRS89 (GRS80 ellipsoid)

UTM conformal projection (Transverse Mercator);
6° zones, reduction factor 0,9996

UTM, ED 50 kilometric grid for Series 25.
UTM, ETRS89 kilometric grid for Series 25DB.