USGS Perspective on The Ele -Hydro Concept
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USGS Perspective on
The Ele-Hydro Concept
Adapted from a presentation by Jeff SimleyUSGS National Hydrography Data Manager
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Erosion and Resistance
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Integration and registration
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Contours integrated with Hydro
Heads-up Digitizing
http://letters-sal.blogspot.com/2011/05/digitizing-wacom-way.html
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How we think and collect now. . .
Elevation
Separate funding mechanisms $$$Indiana LiDAR $3.3millionIndiana Hydro $2.6million
Data housed separately (raster vs vector)
Separate data standards
Managed separately
Separate collection methods
HydroNational Hydro Data• 100k• 24k• Local Data• Watersheds
Vector
National Elevation Data PointCloud
DEM
Raster
Stovepiped
EmpiresTurfs
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High Resolution lidar DEM
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Indiana’s National Hydrography Data Update Project
Illinois - Indiana
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LiDAR Point Cloud
DEM
Veg
Infra-structur
e
Soils
Hydro Hydro-FlattenHydro-Enforced
Forest Canopy
Forest Health
Crop HealthGrasslands
Building footprintsUtilities
Roof analysisTransportation
signage
Watershed
Boundaries
Drainage features
Wetlands
Catchments
SubbasinsFloodplains
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Hydro
Elevation
Combined
USGS Apps:
StreamStats
NHDPlus
U.S. Topo
How we think now -Some integration
occurring. . .
Forcing integration by “burning” the Hydro data into the Elevation data
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U.S. Topo
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Elevation
Vegetation
Landcover
Catchments
Wetlands
NHD
Packaging the Data
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Derive hydrography from the terrain
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Indiana’s Local-Resolution NHD streams and lidar DEM
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Integration – What does it mean?
1) Alignment of elevation and hydrography such that streams flow in channels
2) Interoperability such that a levee can be connected to a river
3) Data Model that links elements and features4) Synthesis such that streamflow can be estimated5) Derivatives such that gradient, channel dimensions, etc.
can be calculated6) Program where a DEM and Hydro can be jointly produced
and funded7) Synchronization so that data are temporally coincident8) Product in a way that both elevation and hydro can be
packaged together9) Delivery of data to be accessed in unison
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Integration – Why?
1) Reduce cost2) Provide improved credibility3) Produce accurate data4) Increase the value of the data5) Empower science-based decisions6) Challenge and drive research
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An Integrated Landscape
“All geospatial software is moving to 3D. It is now an expectation.”
Steve Snow, ESRIImagingnotes.com, http://www.imagingnotes.com/go/article_freeJ.php?mp_id=292