Merriman, Mansfield, 1848-1925 · New York Wiley · leaf 79
for bases and the expenseof measuring them renders it customary, however, to use onlyone or two in a triangulation net of moderate extent. Whenthe sides of the triangles are from one to ten miles in lengtha base line about a mile long may be used. Care must betaken that the triangles connecting it… … of gradually increasing the lengths of the sides away from ameasured base AB; the second method is the better one. In geodetic work bases several miles in length have beenused. For example a base of the U. S. Coast and GeodeticSurvey in Massachusetts is nearly lof miles long, its meas-urement…
Geodesy · Surveying
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