1. Indiana National Hydrography Dataset (NHD) Improvement and Application Workshop NHD Local-Resolution Development

2. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Agenda Background  Pilot Study Approach Project Tasks  Conversion  Conflation Demo Status / Next Steps

3. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Background Working closely with IGIC Waters Workgroup to develop Local-Resolution NHD for the State of Indiana  Product must meet USGS NHD capture standards  Loaded into USGS National Map and IndianaMap upon QC and approval  More detailed hydrography, more accurate spatial locations  All attributes that currently exist in the 1:24K NHD will be transferred (conflated)

4. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Background  Small watershed in Hamilton County (Morse Reservoir and agricultural land)  Broad representation of the water features to be included in the statewide project  Designed to provide a basis for stream location accuracy and upstream drainage area limit assessments  No 1:24K NHD attributes conflated  Written report of findings Pilot study conducted in Summer 2009

5. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Background  Upper Eel will be first sub- basin completed  Linework QC and approval prior to conflation  Interim attribute QC before reach codes are allocated  Attribute conflation QC before work begins on additional sub- basins Statewide project completed by HUC-8 watershed sub-basin in phases:  37 additional sub-basins in state  Local subcontractors will assist with hydrography

6. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Approach  5 feature classes created  NHDFlowline (Stream/River, Canal/Ditch, Artificial Path)  NHDWaterbody (Lake/Pond, Swamp/Marsh, Reservior)  NHDArea (Large Stream/River, Large Canal/Ditch)  NHDPoint (Gaging Station, Well)  NHDLine (Dams) Creation of local-resolution hydrography

7. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Approach 6 acre upstream drainage limit Features digitized from orthoimagery and elevation data 1:24K NHD attribute conflation – NHD attribute population for new features

8. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Approach Base Data  Imagery  2005 one foot and/or half foot pixel RGB orthophotography  Terrain (Contours, DEMs, Hillshades)  2005 five foot cell size DEM (ISTAR)  Supplemented by newer and/or more accurate local data where available

9. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Approach Reference Files  Local Hydrography provided by the State  National Wetlands Inventory (NWI)  INDNR Dams  DOT Bridges  1:24K NHD  Karst Dyelines

10. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Project Tasks - Conversion 1.Hydro-correct elevation data  Generate 6 acre basins and streams for reference (guidance for upstream limits and stream location)  Generate contours, DEMs, hillshades for reference

11. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Project Tasks - Conversion 2.Digitize NHD features  Create 1:2,400 or 1:1,200 scale hydrography layer (dependent upon imagery source) to the 6 acre upstream drainage limit  Imagery will be primary source for data conversion, terrain data used where features are not visible  1:24K NHD used as reference to ensure all features from the 1:24K NHD have been incorporated  Hydrography edge-matched to 1:24K NHD along state borders

12. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Project Tasks - Conversion Business Rules  NHDFlowline  If 1:24K flowline extends further upstream than 6 acres, it will be maintained  If features from 1:24K flowline no longer visible, not included in local resolution dataset  If feature is less than 20 feet wide and less than 600 feet long it will be captured as a flowline

13. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Project Tasks - Conversion Business Rules  NHDArea  If feature is more than 20 feet wide and more than 600 feet long it will be captured as an area  All 1:24K NHDAreas will be retained if the feature is visible in the imagery

14. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Project Tasks - Conversion Business Rules  NHDWaterbodies  ¼ acre or larger will be collected; if less than that but included in 1:24K NHD and visible in imagery, it will be kept  Generated using ERDAS Objective (Ortho-recognition software)

15. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Project Tasks - Conversion Business Rules  NHDPoints – no new features added, copy over and adjust existing 1:24K NHD features as necessary  NHDLines – new features added if found in reference files (dams), will also copy over and adjust existing 1:24K NHD features as necessary

16. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Project Tasks - Conversion 3.Prep data for conflation The NHDinGeo version 2.0 database schema will be used Combination of USGS scripts, and ArcGIS 9.3 tools to check:  Topology  Flow direction  FCode population  Artificial paths  Connectors

17. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Project Tasks - Conflation  USGS NHD GeoConflation Toolset  Reach codes, GNIS info conflated from 1:24K NHD, and generated for new features using the USGS NHD tools  Intermittent/Perennial designations conflated for1:24K attributes only 4.Conflation of1:24K NHD attributes and data population for new features

18. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Project Tasks - Conflation  Most performed through NHD GeoConflation queues at various stages  After permanent reach codes assigned, checks for gapped or branched reach codes  Checks for gapped or branched GNIS names  Subsequent processing steps cannot proceed until potential problems have been resolved Quality Control of conflated attributes: * Close coordination with and approval by USGS

19. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Project Tasks - Conflation Waters Workgroup will check out 1:24K NHD sub-basins as conflation occurs to avoid any other edits being made to the sub-basin Feature level, FGDC compliant metadata generated for each sub-basin

20. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Demo

21. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Status / Next Steps Status  Completed conflation training with USGS  Base data received for Upper Eel pilot area Next Steps  Complete conversion and conflation tasks for Upper Eel pilot area  3 iterations of QC performed by Indiana’s QC team  Prioritize work, outline schedule for remaining sub-basins  Train and engage subcontractors

22. Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Questions and Answers