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The GIS Weasel. An Interface for the Treatment Of Spatial Information In Modeling Roland Viger, Steven Markstrom, George Leavesley. http://wwwbrr.cr.usgs.gov/weasel. The GIS Weasel. What is the GIS Weasel? A Stand-alone Workstation ArcInfo Application Map and menu driven

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the gis weasel
The GIS Weasel

An Interface for the Treatment

Of

Spatial Information In Modeling

Roland Viger, Steven Markstrom, George Leavesley

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel2
The GIS Weasel

What is the GIS Weasel?

  • A Stand-alone Workstation ArcInfo Application
    • Map and menu driven
    • Minimal GIS expertise needed to operate
      • “bring GIS to the modeler”
    • Runs anywhere Workstation ArcInfo does
    • Arc Macro Language (AML), C code, shell scripts
    • Open source
  • Useful for:
    • Delineating spatial features relevant to modeling
    • Characterizing spatial features
    • Parameterizing spatial features

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel3
The GIS Weasel

What is the GIS Weasel?(cont.)

  • Designed to complement a variety of physical process models
    • Lumped parameter models
    • Distributed parameter models
  • Part of the Modular Modeling System Project
    • Framework for assembling physical process algorithms (modules)
    • Allows rapid assembly sets of algorithms optimized for constraints of modeling application at hand
      • Data availability, accuracy, resolution, modeling scale, etc
    • Allows development & comparison of alternative algorithms
    • http://wwwbrr.cr.usgs.gov/mms

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel4
The GIS Weasel

What isn’t the GIS Weasel?

  • A model
  • A modeling system
  • A DEM manufacturing or reconditioning tool
  • An NHD processing or conflation tool

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel5
The GIS Weasel

What does the GIS Weasel try to do?

Standard Tasks:application of well known/accepted methodologies

  • Automate tasks typical to hydrologic modeling
    • Fill DEM pits
    • Derive Flow Direction (D8)
    • Derive Flow Accumulation
    • Delineate Area-Of-Interest (AOI)
    • Derive Slope, Aspect
    • Reclassify Slope, Aspect, Elevation
    • Extract a drainage network from the DEM
  • Hopefully NHD, NED, NED-H, and WBD will reduce most of these tasks to “query” and “download” activities

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel6
The GIS Weasel

What does the GIS Weasel try to do? (cont)

Non-Standard Tasks:the buzzwords

  • Iteration
  • User-Data Interaction
  • Vertical Integration
    • Leverage it in source data (NHD,NED,NED-H,WBD)
    • Generate new relationships with derived data, as needed by model

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel7
The GIS Weasel

What does the GIS Weasel try to do?(cont)

Non-Standard Tasks: the concepts

  • Hydrologic Response Units (HRUs), after Leavesley
    • Land surface areas of homogenous hydrologic character
  • Alternative specializations of this concept
    • Erosion Response Units
    • Chemical Response Units
    • Et cetera
  • Genericized to Modeling Response Units (MRUs)
    • Any type of spatial feature to be modeled

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel8
The GIS Weasel

What does the GIS Weasel try to do? (cont)

Delineate types of MRUs:

  • Can help define and describe features like:
    • Overland flow planes
    • Links in a drainage network
    • Reservoirs/Dams
  • Not limited to single type of point, line, or polygon feature
    • For instance, several types of polygon features
      • Overland flow planes & groundwater reservoirs
  • Not limited to just vector or raster representation
    • Usually try to use both for increased flexibility

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel9
The GIS Weasel

What does the GIS Weasel try to do?(cont)

Delineate types of MRUs:

  • Provide relevant definitions for MRUs
    • Generation and maintenance of simple data models for general and specific MRUs
    • Enforcing consistency between types of MRUs, where necessary
  • Provide relevant sets of tools for the delineation and modification of MRUs
  • Looking to new technology to aid in both of these efforts
    • Current techniques inconvenient to maintain and integrate with standard geoprocessing functions

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel10
The GIS Weasel

What does the GIS Weasel try to do?(cont)

Characterize MRUs:

  • Provide tools to query and analyze MRUs
    • information on which to base further MRU modification
  • Standard Suite
    • histograms, hypsometric curves, cell query, logic query

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel11
The GIS Weasel

What does the GIS Weasel try to do?(cont)

Parameterize MRUs:

  • Generate output for use in a variety of models
    • Precipitation-Runoff Modeling System (PRMS)
    • TOPMODEL
    • Climate Data Distribution Models
    • Flood Frequency Analysis Models
    • Many generic parameters
  • Hope to enlarge library of parameterization methodologies
    • Largely dictated by user demand

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel12
The GIS Weasel

What does the GIS Weasel try to do?(cont)

Parameterize MRUs:

  • Standard Outputs
    • Plain columnar, space delimited ASCII files
      • easy to reformat
    • MMS format parameter files
    • Shapefiles
  • Looking to alternatives in near future
    • XML
    • ESRI geodatabases
      • Leverage Arc API for geoprocessing, SQL and Simple Feature APIs for query and integration with modeling
    • Other open data formats

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

slide13
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Goals for Future

  • Enable tighter integration with modeling system
    • MMS II: The Object Modeling System (OMS)
      • Pure Java and XML
      • Able to integrate native code,
      • Including calls to to COM objects (hopefully)
    • Development of GIS modules for OMS

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel14
The GIS Weasel

Contact Information:

Roland Viger

[email protected]

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel15
The GIS Weasel

Demonstration

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel16
The GIS Weasel

Currently Available Parameterization Methodologies

Based On DEMs:

  • Position
    • (lat/long, projected)
  • Area
    • (various units)
  • Orientation
    • (slope, aspect)
  • Elevation
    • (various units)
  • Derived Category Maps
    • (Radiation Planes)

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel17
The GIS Weasel

Currently Available Parameterization Methodologies

Based On Ancillary Data:

  • Soil
      • (STATSGO/SSURGO)
  • Vegetation Character/Behaviour
      • (type, density, leaf loss,
      • interception, transmissivity)
  • Land Cover Character
      • (impermeability, dominant usage)
  • Climate Data Adjustment Factors
  • Snow Factors
  • Evapotranspiration
      • (Jenson-Haise coef)

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel18
The GIS Weasel

Currently Available Parameterization Methodologies

Based On Topology:

  • Association between features
    • (poly2point, poly2poly, poly2stream)
  • Generic Statistics
    • (mean, median, dominant category, reclassification, et cetera)
  • Overlay (intersection, area, weightings)
  • Line/Network Type Description
    • (downstream, length, order-strahler,order-shreve, velocity, travel time, from/to nodes)

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel19

*Soils (change in hydraulic conductivity with depth, etc)

  • -Due to extreme model sensitivity to this information and limited data accuracy, typically calibrated
The GIS Weasel

Currently Available Parameterization Methodologies

  • TOPMODEL
    • Sub-Catchment Map
    • Channel Routing Increments
      • Percent of Upstream Area
      • Distance to Catchment Outlet
    • Topgraphic Index (the “loni”)
      • Loni Category Numbers
      • Loni Category Values
      • Percent Area w/in each Loni Category

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

the gis weasel20
The GIS Weasel

Potential Development of Parameterization Methodologies

  • HSPF
  • BASINSOFT
  • User Driven
    • Agriculture
    • Climate
    • Subsurface/Groundwater

http://wwwbrr.cr.usgs.gov/weasel

http://wwwbrr.cr.usgs.gov/weasel

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