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form line |
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form line [′fȯrm ‚līn] (mapping) An approximation of a contour line without a definite elevation value, as one derived by visual observation, sometimes supplemented by measured elevations but not in sufficient quantity to produce accurate results; used principally to indicate the appearance of terrain which has not been accurately surveyed. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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