Maps Their Uses And Construction a Short Popular Treatise On the Advantages An
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Those measured east and west at the parallel of, say, 2° north or south will be shown too long on the map in the proportion of 0*9994 to 1. As this corresponds to a length of 5^ of an inch, in a sheet of 40 inches it is inappreciable for mapping purposes.
Now, if a belt of the earth 240 geographical miles wide can be shown without appreciable distortion on this system at the Equator, it can be shown along any other great circle, and a very good map of England can 92 MAPS: THEIR USES AND CONSTRU...CTION be plotted, taking the meridian of 2° west as the standard.
But this system has one objectionable feature, which does not show itself at the Equator, nor is it of con- sequence when an entire map is shown on one sheet, but the only valuable quality which this projection possesses is its applicability to the issue of maps on a large scale in sheets which are all rectangular, all of the same size, and all lie fiat when joined together, and it is in the extreme eastern and western sheets of maps plotted on a central meridian that this feature is seen at its worst- The objection is the one stated above, that while in the sheets at the central meridian the top and bottom lines of the sheets run east and west, this is not the case in the extreme sheets.
What to read after Maps Their Uses And Construction a Short Popular Treatise On the Advantages An?
You can find similar books in the "Read Also" column, or choose other free books by Gabriel James Morrison to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Those measured east and west at the parallel of, say, 2° north or south will be shown too long on the map in the proportion of 0*9994 to 1. As this corresponds to a length of 5^ of an inch, in a sheet of 40 inches it is inappreciable for mapping purposes.
Now, if a belt of the earth 240 geographical miles wide can be shown without appreciable distortion on this system at the Equator, it can be shown along any other great circle, and a very good map of England can 92 MAPS: THEIR USES AND CONSTRU...CTION be plotted, taking the meridian of 2° west as the standard.
But this system has one objectionable feature, which does not show itself at the Equator, nor is it of con- sequence when an entire map is shown on one sheet, but the only valuable quality which this projection possesses is its applicability to the issue of maps on a large scale in sheets which are all rectangular, all of the same size, and all lie fiat when joined together, and it is in the extreme eastern and western sheets of maps plotted on a central meridian that this feature is seen at its worst- The objection is the one stated above, that while in the sheets at the central meridian the top and bottom lines of the sheets run east and west, this is not the case in the extreme sheets.
What to read after Maps Their Uses And Construction a Short Popular Treatise On the Advantages An?
You can find similar books in the "Read Also" column, or choose other free books by Gabriel James Morrison to read onlineMoreLess
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