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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

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The gis weasel l.jpg

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


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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


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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


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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


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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


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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


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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


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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


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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


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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


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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


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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


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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


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The GIS Weasel

Contact Information:

Roland Viger

[email protected]

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

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


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The GIS Weasel

Demonstration

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

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


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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


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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


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    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


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    • *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


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    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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