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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Just for clarification, if the NHD is used from Dataminer, it will already be in Albers. However, there are other sources from which to get the NHD which may be in a different coordinate system.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> gis-l-bounces@lists.dep.state.fl.us [mailto:gis-l-bounces@lists.dep.state.fl.us] <b>On Behalf Of </b>Woeber, Nathan (Andy)<br><b>Sent:</b> Thursday, September 05, 2013 11:12 AM<br><b>To:</b> Ali, Eesa; gis-l@lists.dep.state.fl.us<br><b>Subject:</b> gis-l: RE: measuring distances along NHD river (polyline) <o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:#1F497D'>Eesa,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>The only caveat to the LengthKM may be that the NHD comes in geometric coordinate system with degrees so those measurements in the shape length and LengthKm are in radians not a true length so you will need to create a new field and convert. Or go to Albers projection and get meters.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><img width=499 height=395 id="Picture_x0020_1" src="cid:image001.jpg@01CEAA2C.ECFE3A10"><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>For instance I checked NHDFlowline for a small artificial path with length in the table reported in “Shape_Length” as 0.000445, that is a radian of a circle so its not meters. I measured the length on the map and it reported<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>This:<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><img width=267 height=151 id="Picture_x0020_2" src="cid:image002.png@01CEAA2C.ECFE3A10"><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>So be careful interpreting the fields as it has that underlying geometric coordinate system of degrees and you will need to convert to meters. My advice for true lengths is to project NHDFlowline to Albers which has the underlying measurement of meters then use Edwins suggestions for getting your lengths. After reprojection to albers then recalculating shapelength I got the table to reflect meters vs radian measurements.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>47.396285, a bit different from the measurement tool but more accurate.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Andy<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:gis-l-bounces@lists.dep.state.fl.us">gis-l-bounces@lists.dep.state.fl.us</a> [<a href="mailto:gis-l-bounces@lists.dep.state.fl.us">mailto:gis-l-bounces@lists.dep.state.fl.us</a>] <b>On Behalf Of </b>Abbey, Edwin<br><b>Sent:</b> Thursday, September 05, 2013 10:02 AM<br><b>To:</b> Ali, Eesa; <a href="mailto:gis-l@lists.dep.state.fl.us">gis-l@lists.dep.state.fl.us</a><br><b>Subject:</b> gis-l: RE: measuring distances along NHD river (polyline) <o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:#1F497D'>Good morning Eesa,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Look for the attribute “LengthKM” in the NHDFlowline attribute table. If you have several flowlines selected, display selected records only and right-click on the “LengthKM” heading and click “Statistics”. A popup window will display an assortment of statistics including a sum of the lengths of the selected records.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Alternatively, you can also right-click the heading of a the “Resolution” attribute and choose “Summarize”, then in the Summarize window, select “sum” under the LengthKM attribute. Use the Browse folder for specifying the location and output file type for the table that is created (dbf, gdb table, csv, etc).<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>In order to select several flowlines between two points, I suggest trying to use the Utility Network Analysis toolbar. On the Analysis drop-down, select Options. From the Options window, click the Results tab. Make sure the setting for “Return results as” is set for “Selection”.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Then, using the “Add Edge Flag” tool, drop a blue flag at the beginning and end of the route you are assessing. Change the Trace Task to “Find Path” and click Solve. The flowlines between the flags will be selected.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Hope this helps,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Edwin<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'>Edwin A. Abbey<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'>NHD Coordinator - Environmental Manager <br>Office of Watershed Services<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'>Florida Department of Environmental Protection<br>2600 Blair Stone Road, MS 3526<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'>Tallahassee, Florida 32399<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'>phone: 850-245-8550<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'>fax: <span style='color:black'>850-245-8236</span><br></span><a href="mailto:Edwin.Abbey@dep.state.fl.us"><span style='font-size:12.0pt'>Edwin.Abbey@dep.state.fl.us</span></a><span style='font-size:12.0pt'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p><p class=MsoNormal><a href="http://www.dep.state.fl.us/water/watersheds/nhd.htm">www.dep.state.fl.us/water/watersheds/nhd.htm</a><span style='color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><a href="www.protectingourwater.org"><span style='font-size:12.0pt'>www.protectingourwater.org</span></a><span style='font-size:12.0pt'><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:gis-l-bounces@lists.dep.state.fl.us">gis-l-bounces@lists.dep.state.fl.us</a> [<a href="mailto:gis-l-bounces@lists.dep.state.fl.us">mailto:gis-l-bounces@lists.dep.state.fl.us</a>] <b>On Behalf Of </b>Ali, Eesa<br><b>Sent:</b> Thursday, September 05, 2013 9:13 AM<br><b>To:</b> <a href="mailto:gis-l@lists.dep.state.fl.us">gis-l@lists.dep.state.fl.us</a><br><b>Subject:</b> gis-l: measuring distances along NHD river (polyline) <o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoPlainText>Other than dragging a line along a river using the measuring tool, what options do I have to measure distance along a polyline (river in the NHD layer)? <o:p></o:p></p><p class=MsoPlainText>Thanks,<o:p></o:p></p><p class=MsoPlainText>e <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#9BBB59'>Eesa Gafoor-Ali <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#9BBB59'>Environmental Specialist II<br></span><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#4F81BD'>S</span><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#9BBB59'>urface </span><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#4F81BD'>W</span><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#9BBB59'>ater </span><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#4F81BD'>A</span><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#9BBB59'>ssessment & </span><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#4F81BD'>M</span><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#9BBB59'>onitoring </span><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#4F81BD'>P</span><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#9BBB59'>rogram <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#9BBB59'>8800 Baymeadows Way West, Suite 100<br>Jacksonville, FL 32256 <o:p></o:p></span></p><p class=MsoNormal><a href="mailto:eesa.ali@dep.state.fl.us"><span style='font-size:10.0pt;font-family:"Book Antiqua","serif"'>eesa.ali@dep.state.fl.us</span></a><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#9BBB59'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";color:#9BBB59'>904-256-1628 office <br>904-813-1298 mobile <o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p></div><div><p class=MsoNormal><em><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Please take a few minutes to share your comments on the service you received from the department by clicking on this link <a href="http://survey.dep.state.fl.us/?refemail=Eesa.Ali@dep.state.fl.us" target="_blank">DEP Customer Survey</a>.</span></em><span style='font-size:9.0pt;font-family:"Courier New"'><o:p></o:p></span></p></div></div></div></div></body></html>