Two-book map volume

摘要

An improved volume of map, chart, or large image data, constructed of two complimentary books in which a comprehensive data region (10) is divided into a plurality of rectangular segments (22). The segments are separated into two groups as if a checkerboard pattern of alternating light and dark rectangles (34), (54) existed. The segments are further divided in half and made into facing pages or leaves (90), with each book (82), (86) containing generally half the sum of the data segments of the comprehensive map. The facing leaves are further ordered by two- dimensional coordinate based on row (98), and column (94) of the segments. The two-dimensional facing leave coordinate (130) is clearly printed on facing leaves.PPAn oversized cover (118) contains applicable coordinate scales or measure rules (110) on the inner sides of the visible area (122) of oversizement when the book is open. The scales are aligned to and applicable to the facing leaves. Leaves containing the detail segment data contain only data (106) extending to the leave edges and the facing leave coordinate reference. Both books contain a key map (102) of the comprehensive data with a checkerboard tinted grid overlay (114) matching the segments to indicate which book the segment is in. It also displays the two-dimensional coordinates of the facing leaves within each grid or by column and row on outer scales. Leaves are ordered within each book in a row and column manner. Both books also contain comprehensive indexes which reference points of interest by the two- dimensional facing leave coordinate indicating segment or facing leaves address and then an additional two-dimensional coordinate for location on the facing leaves.