Report of the Superintendent ... Showing the Progress of the WorkU.S. Government Printing Office, 1921 |
Այլ խմբագրություններ - View all
Report of the Superintendent ... Showing the Progress of the Work U.S. Coast and Geodetic Survey Ամբողջությամբ դիտվող - 1892 |
Report of the Superintendent ... Showing the Progress of the Work U.S. Coast and Geodetic Survey Ամբողջությամբ դիտվող - 1913 |
Report of the Superintendent ... Showing the Progress of the Work U.S. Coast and Geodetic Survey Ամբողջությամբ դիտվող - 1916 |
Common terms and phrases
Alaska area covered Atlantic automatic tide gauge azimuth bench marks established buoys Bureau Cape channel charts Clarence Strait Coast and Geodetic Coast Pilot Commanding Steamer completed connection Creek depth determined double angles drag Engineers entrance extending fathoms feet fiscal Geodetic Survey Gulf Harbor horizontal measures hydrographic sheets hydrography Inlet inshore hydrography Island July Ketchikan Key West launch levels run Lighthouse located magnetic main scheme occupied Marquesas Keys miles of area miles of levels navigation necessary Neuse River observatory occupied for horizontal operations Pamlico Sound party Point Port Royal Sound precise levels precise triangulation reefs REPORT OF DIRECTOR resurvey River rocks run while sounding scale season sheets finished Shelikof Straits ship shoal shore line Sibuguey Bay signal poles erected square miles stations in main stations occupied SUMMARY OF RESULTS.-Triangulation tide gauge tide tables tion topography Tybee Tybee Island vessel vicinity weather wire wire-drag
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Էջ 31 - For this reason the results of triangulation in publications of the United States Coast and Geodetic Survey, the United States Geological Survey, and the...
Էջ 9 - For every expenditure requisite for and incident to the survey of the Atlantic, Gulf, and Pacific coasts of the United States...
Էջ 58 - SOUTHEASTERN ALASKA. — In southeastern Alaska the first and most obvious need is to complete the wire-drag work. Most of these waters have been sounded, so that only dragging is necessary to complete the survey.
Էջ 58 - Both of these have recent surveys, but. as the bottom is subject to change on account of the large rivers, future additional surveys will be needed. As an example of what surveys mean in a new region, the discovery of an entrance to the Kuskokwim Eiver suitable for moderate-draft vessels opened up an immense area for grazing, and also in places for general agriculture.
Էջ 58 - West and ea.it coast of Palawan. — The coast line of the island of Palawan is very irregular, indented with deep bays forming some of the finest harbors in the Archipelago. The whole region about the island and extending southward to Balabac Island, Banguey Island, to Cagayan Sulu, and off the north coast of Borneo consists of coral reefs, many small islets, and innumerable hidden dangers to navigation. To the westward of Palawan, reefs and dangers extend to over 100 miles offshore. The hydrographic...
Էջ 58 - ... the work required to bring them up to date has been postponed, as the need for resurveys has been more urgent farther south. Up to a few years ago the offshore surveys from Cape Hatteras to the Florida Reefs were almost unbelievably .deficient. This condition is being remedied as rapidly as possible, and between Winyah Bay, SC, and St. Augustine, Fla., the offshore work out to the Gulf Stream is complete. It is important that this work be extended both north and south from its present limit as...
Էջ 31 - Geological Survey, and US Corps of Engineers are always given in geographic coordinates, for the triangulation in any of these publications either covers a large area or is joined to the triangulation scheme of the whole United States. When all the points of a survey are located within a relatively small area, such as a city or small county, the use of plane coordinates instead of geographic coordinates is much more convenient, since the computations involved are thereby greatly simplified.
Էջ 58 - YORK. — There is scarcely any part of our coast where correct soundings are of more importance than in the approach to New York from the eastward, as all transAtlantic steamers bound to that port pass over this area. Many of them have to depend on soundings for safety. A fairly good survey of this area is available, but additional work should be done by modern methods in the portion out of sight of land so that the needs of the enormous traffic will be met. (See fig.
Էջ 58 - River have been sounded for a short distance offshore, but even in this area the soundings are too far apart to more than indicate, in a general way, the depth which may be expected. This partial survey extends southward along the coast to include the approaches to two other harbors. The approaches to the remaining five, on which $3,826,000 hav« been expended in improvement, are entirely unsurveyed.
Էջ 58 - ... 74. NORTON SOUND. — The importance of Norton Sound is due to the gold mining on its northern shores and as being the outlet of the Yukon Delta on the southern shore. In all of Norton Sound additional surveys are needed. It is curious that in this sound, which according to all available information is of quite level, sandy, or muddy bottom, Besboro Island rises very abruptly to a height of 1,012 feet. With such an occurrence it is not absolutely certain that no pinnacle rocks exist. (See fig.