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Using the Network Analyst Utility with the National Hydrography Dataset

This workshop explores the use of Utility Network Analyst with the National Hydrography Dataset (NHD) to improve waterflow analysis and network topology. Learn how to add NHD data, show flow direction, determine common ancestors, find connected flowlines, trace downstream, and more. Also, discover how to improve the NHD to local resolution by adding additional flowlines and aligning them with DOQQ imagery.

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Using the Network Analyst Utility with the National Hydrography Dataset

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  1. Indiana National Hydrography Dataset Improvement and Application Workshop Using the Network Analyst Utility with the National Hydrography Dataset

  2. Using Utility Network Analyst with NHD • Tool in ESRI ArcMap • ArcView license, no extension required • NHD network topology allows for analyzing waterflow • Flow direction • Junctions • Connectivity

  3. Using Utility Network Analyst with NHD • Add data from the NHD geodatabase to the Map • Hydrography dataset HYDRO_NET • HYDRO_NET_Junctions • NHDFlowline • Add Other data as needed (not required)

  4. Using Utility Network Analyst with NHD

  5. Using Utility Network Analyst with NHD • Turn on the Utility Network Analyst Toolbar in ArcMap • Set Network to HYDRO_NET • Choose Trace Task

  6. Using Utility Network Analyst with NHD • Show Flow Direction • From Flow menu, select Display Arrows

  7. Using Utility Network Analyst with NHD • Show Flow Direction • Determine common ancestors • Add edge flags at two or more locations • Choose task • Solve

  8. Using Utility Network Analyst with NHD • Show Flow Direction • Determine common ancestors • Find connected flowlines • Add edge flag • Choose task • Solve

  9. Using Utility Network Analyst with NHD • Show Flow Direction • Determine common ancestors • Find connected flowlines • Trace downstream • Add edge flag • Choose task • Solve

  10. Using Utility Network Analyst with NHD • Show Flow Direction • Determine common ancestors • Find connected flowlines • Trace downstream • Find upstream accumulation • Add edge flag • Choose • Solve

  11. Using Utility Network Analyst with NHD • Improving the NHD to Local Resolution • Add additional flowlines • Align flowlines to 2005 DOQQ imagery • Improve hydrology network • Better data, better analysis results

  12. Using Utility Network Analyst with NHD http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//002r00000028000000.htm

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