| 摘要 |
A bound volume of cartographic material that includes a plurality of rectangular leaves of a first height and width, with each of the leaves having a top and a bottom edge and a first and second edge, and a cover. The cover includes a first panel and a second panel, with the first panel having a first and a second side edge. The first panel is bound by a metal binding mechanism along the first side edge, and the second panel is hingedly connected to the second side edge of the first panel. The second panel is proportioned to fold over the first panel and to fold out and lie adjacent the second side edge of the first panel. The second panel, when folded out, displays first, small scale cartographic indicia and key grid indicia, with the key grid indicia including multiple grid sections overlying the first cartographic indicia. Each of the leaves defines second, large scale cartographic indicia and bears a key grid indicium, with the cartographic indicia on an individual leaf corresponding to the cartographic indicia in one of the grid sections, and the key grid indicium on the individual leaf corresponding to the key grid indicia for one of the grid sections. The second panel and the leaves may be used in juxtaposition to view, coordinate, and compare the large scale and the small scale cartographic indicia in a side-by-side relationship.
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