. Annual Reports of the Department of the Interior 1905. MAP OF IJ:^riTED STATES, SHOWIlSra AEE AND THE SCALE EMPI Scal(0 100 X90. PL :ale 00 S COVEBED BY TOPOGBAPHIC SUBTEYS rED FOR EACH AREA 200 ? I— 300 miles WORK OF THE YEAR TOPOGRAPHIC BRANCH. 101 square miles in the western division, over which prelim-inary reconnaissance surveying had been previously car-ried, thus making the total area of actual surveys for theseason 26,850 square miles. In connection with these topographic surveys therewere run 27,186 linear miles of spirit levels, whichamount includes 252 miles of precise levels, thu
. Annual Reports of the Department of the Interior 1905. MAP OF IJ:^riTED STATES, SHOWIlSra AEE AND THE SCALE EMPI Scal(0 100 X90. PL :ale 00 S COVEBED BY TOPOGBAPHIC SUBTEYS rED FOR EACH AREA 200 ? I— 300 miles WORK OF THE YEAR TOPOGRAPHIC BRANCH. 101 square miles in the western division, over which prelim-inary reconnaissance surveying had been previously car-ried, thus making the total area of actual surveys for theseason 26,850 square miles. In connection with these topographic surveys therewere run 27,186 linear miles of spirit levels, whichamount includes 252 miles of precise levels, thus makingthe total mileage of spirit levels since the first authoriza-tion of this class of work by Congress, in 1896, amountto 158,064 miles. In addition, 18,920 miles of levels wererun by stadia angulation. The total area covered by topographic surveys made bythe members of the topographic branch in Alaska duringthe fiscal year 1901-5, as reported in detail on pages 54-76,was about 6,600 square miles. Presen t condition of topograpJiic surveys of the United States^ showing nevj areas surveyed in 190Jf-5. State or Territ
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashi, bookyear1905
