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An orienteering map is a map specially prepared for use in orienteering competitions. It is a topographic map with extra details to help the competitor navigate through the competition area. These maps are much more detailed than general-purpose topographic maps, and incorporate a standard symbology that is designed to be useful to anyone, regardless of native language. In addition to indicating the topography of the terrain with contour lines, orienteering maps also show forest density, water features, clearings, trails and roads, earthen banks and rock walls, ditches, wells and pits, fences and power lines, buildings, boulders, and other features of the terrain. Orienteering maps are 1:15 000 or 1:10 000 scale.〔Zentai, László, ed. (2000). ''(International Drawing Specifications for Orienteering Maps (ISOM2000) )''. International Orienteering Federation.〕 ==Purpose== An orienteering map, and a compass, are the primary aids for the competitor to complete an orienteering course of control points as quickly as possible.〔 A map that is reliable and accurate is essential so that a course can be provided which will test the navigational skills of the competitor. The map also needs to be relevant to the needs of the competitor showing the terrain in neither too much nor too little detail. Because the competition must test the navigational skills of the competitor, areas are sought which have a terrain that is rich in usable features. In addition, the area should be attractive and interesting. Notable examples in the US include Pawtuckaway State Park, New Hampshire and Valles Caldera, New Mexico, both having many boulders and boulder fields, and a wide variety of other terrain types. Orienteering maps are produced by local orienteering clubs and are a valuable resource for the club. Orienteering maps are expensive to produce and the principal costs are: the fieldwork, drawing (cartography), and printing. Each of these can use up valuable resources of a club, be it in manpower or financial costs. Established clubs with good resources e.g. maps and manpower are usually able to host more events. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「orienteering map」の詳細全文を読む スポンサード リンク
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