DESCRIPTION AND DEFINITION OF THE INTERNATIONAL BOUNDARY LINE FROM THE GULF OF GEORGIA (GEORGIA STRAIT) TO THE NORTHWESTERN MOST POINT OF LAKE OF THE WOODS The International Boundary Line between the United States and the Dominion of Canada from the Gulf of Georgia (Georgia Strait) to the Northwesternmost Point of Lake of the Woods as now reestablished is a series of straight-line courses which, taken together, closely approximate the astronomic parallel of forty-nine degrees of north latitude from the eastern shore of Georgia Strait to the turning point in Lake of the Woods, and a single straight-line course running due north from this turning point to the Northwesternmost Point of Lake of the Woods. It is primarily marked and defined by 926 boundary monuments, numbered consecutively from 0 to 925, and by 2 reference monuments at its terminus at the Northwesternmost Point of Lake of the Woods. The boundary is a straight line between each two consecutive monuments, between the turning point in Buffalo Bay of Lake of the Woods and the next of these monuments on either side thereof, and between the Northwesternmost Point of Lake of the Woods-as defined by the two reference monuments— and the first monument on line to the south. In addition to these primary marks, the boundary has been marked under the provisions of the treaty of 1925 by 37 auxiliary marks-33 monuments designated by letters following the numbers, and 4 range marks. The 33 monuments have been placed on the straight-line courses between the primary monuments at places where the need for additional marks has developed. The four range marks have been erected to range the long straight-line course of the boundary across Boundary Bay between Monuments 4 and 5. Three of them mark points on this course of the boundary and the fourth is on the eastern prolongation of the course. The total length of the line so reestablished and marked is 1,296.9 miles1,270.2 miles along the parallel and 26.7 miles along the meridian or north-and-south line. The description of the line, as reestablished by the Commissioners and as marked by them on the 59 boundary maps which accompany this report, is set forth in tabular form on pages 144 to 160, inclusive. The tables give the geographic positions of all the boundary monuments, the turning point, termini, and reference monuments, together with the lengths and azimuths of the connecting straight-line courses. The lengths of the courses and other tabulated distances are given in meters, and the azimuths are reckoned clockwise from due south. All distances have been reduced to mean sea level. To obtain the actual horizontal distance between points of known elevation above sea level, the distances given in the tables should be increased by an amount equal to 0.0000000478 L E, in which L is the tabulated length of the course in meters and E is the mean elevation of the ends of the course 122824°-37--11 143 in feet. The maximum value of this increase approaches 1 part in 2,300 on the highest elevations of this section of the boundary. All latitudes and longitudes are given on the North American datum of 1927. This is the standard geodetic datum recently adopted by the United States Coast and Geodetic Survey for the United States and Alaska, and for the present in use by the Geodetic Survey of Canada for the extension of its triangulation northward in western Canada. It is the result of the readjustment of the network of arcs of first-order triangulation of the two countries, retaining the latitude and longitude of the station "Meades Ranch" of the former North American datum, but controlling the orientation of the new adjustment by many additional Laplace azimuths distributed throughout the network.1 It supersedes the former North American datum. 1 A geographic position is said to be on the North American datum of 1927 when the station is connected with the stations of the network of arcs of the readjusted first-order triangulation by continuous triangulation or traverse computed on the Clarke spheroid of 1866, as expressed in meters. GEOGRAPHIC POSITIONS OF MONUMENTS MARKING THE INTERNATIONAL BOUNDARY FROM THE GULF OF GEORGIA (GEORGIA STRAIT) TO THE NORTHWESTERN MOST POINT OF LAKE OF THE WOODS ? This range mark pertains to the boundary through Georgia Strait. It is included here as a reference. For geographic position see p. 160. 3 This range mark is also a boundary mark. This range mark is on the prolongation of the boundary course Monument 4-Monument 5. For geographic position see p. 160, Mon. 12...... 49.00 08.26 122 40 04.03 49.00 08.32 122 38 45. 27 49 00 08.34 122 38 19.79 49 00 08.37 122 37 26. 23 89 57 34 269 56 09 89 57 08 269 55 25 Mon. 9. Mon. 8. 1,613.3 1,600. 8 1,600.8 517.9 89 55 44 269 56 38 Mon. 10. 517.9 1,088. 5 89 57 19 269 56 37 1,088.5 1,690.0 |