National Geographic : 1892 Mar 31
114 Henry Gannett-Mother Maps of the United States. most of the present stage of development has been produced since the work of the Hayden, Wheeler, King and Powell sur veys was done. To bring this culture element up to date on maps of the two last-mentioned scales, viz, 8 and 16 miles to one inch, the postal-route maps are of great service-are, indeed, well-nigh invaluable. SUMMARY. About 76 per cent of the area of the United States, exclusive of Alaska, has been surveyed by the general government on various scales, and fully 16 per cent more has been surveyed by other organizations or private parties in such manner as to yield useful maps, leaving barely 8 per cent of our territory un surveyed. The mother maps of the country are based upon these surveys. The areas represented on the various mother maps of the United States and available for compilation, classified by the scales on which they are worthy of reproduction, are summarized in the appended table. They are also shown graphically in the accompanying map of the United States forming plate 17. The scale of 1: 1,000,000, or nearly 16 miles to one inch, has been adopted by the Geographic congress for mapping the earth, and it is therefore of interest to know how much of this country can be mapped on this scale, and where the areas are located concerning which our information is too scanty to warrant such representation. These areas may briefly be enumerated. They are: Northern Maine. Adirondack plateau of New York. Southern Florida. Most of Idaho and much of Montana. The Cascade and Coast ranges of Oregon and Washington. Western North Dakota and South Dakota. Western Texas and southeastern New Mexico.
1892 May 15
1892 Feb 19