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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br /> <br />A ....J <br /> <br />Figure 4-Z-Xrreme (iPS .\)'.'ilem <br /> <br /> <br />Figure 5-RTK IJase Station <br /> <br />The GPS unit acquired point data in the acquisition process_ Points were taken wherever there <br />was a significant break in the slope or where there was a significant elevation change within a <br />cross section. In addition. points were taken at left and right bankfull and at the thalwag of each <br />cross section. Cross sections were taken immediately downstream and immediately upstream of <br />each bridge. culvert. or other obstructive crossing. A single point was taken on the deck surface <br />of each crossing. An effort was made to take cross section profiles no mOTe than 1000 feet apart. <br />All separate cross section were given an identifYing name, and the banks and center of the <br />channel were noted in the description. The GPS output file was in a comma delimited text file <br />reporting the point number, latitude, longitude. elevation. and description. This text file was then <br />handled in the procedures described below. The surveying of the cross sections concluded the <br />data collection process. <br /> <br />4.1 Dala Analysis <br /> <br />The GPS points obtained from surveying were directly downloaded into the computer program <br />TDS Survey Links that accompanied the GPS data collector. The points were opened in the <br />fonn of a spreadsheet with Excel and sorted into individual cross sections. A Macro was used to <br /> <br />12 <br />