Card blade cuttings NGI, numerical series

The numerical series of the NGI’s analogue Topographic Maps (published on paper) are made out according to grids with rectangular meshes that fit geographically together. The various hierarchical levels of layouts in card sheets (1/1 or full card sheet, 1/4 card sheet, 1/8 card sheet and 1/16 card sheet) are included in the dataset ‘Captop cut-offs NGI, numerical series’. These are regular card blade grids, parallel to the Belgian Lambert 72 coordinate system, located in Flanders and Brussels. The origin is at Belgian Lambert 72 coordinate (2 000.00 m, 138 000.00 m).- The full or 1/1 map sheets measure 32 km x-directional and 20 km in y direction (640 km²) and are used for the issue of the numerical series of the 1: 50 000 Topographic maps of the NGI (hence the name 1: 50 000 map sheets).- The 1/4 card blades or quarter-map sheets measure 16 km x 10 km (160 km²). These cut-outs are used for the edition of the numeric series of the 1: 20 000 topographic maps.- The 1/8 map sheets measure 8 km x 10 km.- The 1/16 map sheets measure 8 km x 5 km (40 km²). The numeric series of the 1: 10 000 Topographic maps use these cut-outs.