slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Wyoming’s NHD and WBD Maintenance and Enhancements PowerPoint Presentation
Download Presentation
Wyoming’s NHD and WBD Maintenance and Enhancements

Loading in 2 Seconds...

play fullscreen
1 / 25

Wyoming’s NHD and WBD Maintenance and Enhancements - PowerPoint PPT Presentation


  • 86 Views
  • Uploaded on

Wyoming’s NHD and WBD Maintenance and Enhancements . Paul Caffrey Wyoming Geographic Information Science Center (WyGISC). NHD/WBD Stewardship Conference March 29-30, 2012 New Orleans, Louisiana. What have we done What have we not done What next Discussion/Questions. Overview. Dams

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Wyoming’s NHD and WBD Maintenance and Enhancements' - keaira


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Wyoming’s NHD and WBD Maintenance and Enhancements

Paul Caffrey

Wyoming Geographic Information Science Center

(WyGISC)

NHD/WBD Stewardship Conference

March 29-30, 2012

New Orleans, Louisiana

overview
What have we done

What have we not done

What next

Discussion/Questions

Overview
state events
Dams

Gaging stations

Diversion structures

State Events
state dam gaging station diversion structure

1,458 new Dam Events were added that were not originally captured in NHD

56 existing Dam Events were spatially corrected (these dams were originally captured in NHD, but not at correct location/point along NHD Flowline)

90 new Gaging StationEvents were added

24 new Diversion StructureEvents with radio telemetry

State Dam/Gaging Station/Diversion Structure

slide6

GNIS & NHD

  • Performed a check to locate and correct
    • Missing
    • Misspelled
    • Misplaced
  • named features for the streams, rivers, lakes and point features in Wyoming
slide9

GNIS & NHD

  • For the NHD, the task for assigning names to water features using the GNIS was a pretty straightforward process. Unfortunately, discrepancies and errors persist due to:
      • low resolution GNIS vectors and points and coordinate errors
      • interpretative mistakes made during GNIS conflation process while creating the hydrographic data.
gnis updates made to wyoming s nhd

Streams:

97 NHD Flowlines (originally unnamed) received GNIS names and ID numbers

129 NHD Flowlines received corrections to their GNIS name and/or ID number

19 are unable to be corrected due to inherent GNIS coordinate errors and other issues

GNIS updates made to Wyoming’s NHD

slide12

Lakes/Reservoirs:

638 NHD unnamed Waterbodiesreceived GNIS names and ID numbers

118 NHD Waterbodies received corrections to their GNIS name and/or ID number

123 WB features missing geometry have been captured

slide13

Lakes/Reservoirs (cont.):

34 NHD Waterbodies with missing or incorrect GNIS names/IDs are still in need of correction

294 are unable to be corrected due to inherent GNIS coordinate errors and other issues

slide14

Springs/Waterfalls/Rapids:

206 missing features currently being captured, soon to be added to NHD Point geometry

236 NHD Points with missing or incorrect GNIS names/IDs in need of correction

62 not corrected due to inherent GNIS coordinate errors

wbd hydrologic unit name updates

151 watersheds (10-digit units) have received an updated HU_10_NAME

52 of these are shared with one or more bordering states and are awaiting coordination

1,309 subwatersheds (12-digit units) have received an updated HU_12_NAME

153 of these are shared with one or more bordering states and are awaiting coordination

WBD- Hydrologic Unit Name Updates

nhd wbd pour points1

Primary purpose for creating the True Pour Point features was twofold:

  • To capture the most accurate geographic location of all WBD outlets/stream drainage points using the 2009 NAIP
  • To assess the horizontal accuracy and vertical alignment discrepancies between a stream's current pour point location and its WBD and NHD counterpart
    • Pour Point/NHD average offset distance equaling ~70 meters
    • Pour Point/WBD average offset distance equaling ~121 meters.

NHD/WBD Pour Points

nhd wbd pour points2

2,327 True Pour Points were placed at the most horizontally accurate/current geographic location of drainage points for all streams at WBD outlets

The number of True Pour Points exceed the number of WBD outlets (2,195), due to multiple drainage points from complex stream channels

2,192 NHD Pour Point Events were indexed to the top of all NHDFlowline reaches draining from WBD outlets

NHD/WBD Pour Points

slide24

Acknowledgements-

USGS/NRCS

NHD/WBD Team

Barb Ray, WY Geo-Liaison

Wyoming BLM:

State Office, Rick Schuler

Wyoming State Engineers Office

Jason Feltner

Wyoming Board of Geographic Names

UW/WyGISC Team

Pat Madsen, GIS Specialist

slide25

Discussion

Questions