An Analytic Framework for GIS ModelingAn Analytic Framework for GIS Modeling

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An Analytic Framework for GIS ModelingAn Analytic Framework for GIS Modeling

The The Analysis Frame Analysis Frame provides consistent provides consistent “parceling” needed “parceling” needed for map analysis for map analysis and extends and extends discretediscrete point, line and areal point, line and areal features to features to continuouscontinuous Map SurfacesMap Surfaces

LinesLines

FillFill

Layer MeshLayer Mesh Grid MapGrid Map

A A Grid MapGrid Map consists of a matrix of numbers with a consists of a matrix of numbers with a value indicating the characteristic /condition at each value indicating the characteristic /condition at each grid cell locationgrid cell location

Map Stack forming a geo-registered set of Map forming a geo-registered set of Map

Layers or “Layers or “Map StackMap Stack””

Data listing for aMap Stack

Drill-down

Col 3, Row 22Col 3, Row 22

Analysis FrameAnalysis Frame

Layer MeshLayer Mesh(Berry)(Berry)

An Analytic Framework for GIS ModelingAn Analytic Framework for GIS Modeling

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Reclassify operationsReclassify operations involve reassigning involve reassigning map values to reflect new information map values to reflect new information about existing map features.about existing map features.

An Analytic Framework for GIS ModelingAn Analytic Framework for GIS Modeling

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Overlay operationsOverlay operations involve characterizing involve characterizing the spatial coincidence of mapped data.the spatial coincidence of mapped data.

An Analytic Framework for GIS ModelingAn Analytic Framework for GIS Modeling

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Proximity operationsProximity operations involve measuring involve measuring distance and connectivity among map distance and connectivity among map locations.locations.

An Analytic Framework for GIS ModelingAn Analytic Framework for GIS Modeling

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Neighborhood operationsNeighborhood operations involve involve characterizing mapped data within the characterizing mapped data within the vicinity of map locations.vicinity of map locations.

An Analytic Framework for GIS ModelingAn Analytic Framework for GIS Modeling

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Surface ModellingSurface Modelling operations involve operations involve creating continuous spatial distributions creating continuous spatial distributions from point sampled data.from point sampled data.

An Analytic Framework for GIS ModelingAn Analytic Framework for GIS Modeling

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Spatial Data MiningSpatial Data Mining operations involve operations involve characterizing numerical patterns and characterizing numerical patterns and relationships among mapped data.relationships among mapped data.

An Analytic Framework for GIS ModelingAn Analytic Framework for GIS Modeling

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GIS modeling GIS modeling logic can be expressed as a flowchart of processing with “boxes” representing existing logic can be expressed as a flowchart of processing with “boxes” representing existing and derived maps and “lines” representing map analysis operations . and derived maps and “lines” representing map analysis operations . (MapCalc(MapCalcTMTM software commands ) software commands )

Elevation SlopeSteepness

CostElevation

SteepnessSteepness

Slo

pe

Ren

um

ber

ElevationVisual

ExposureExposure

Cost

Houses

Visual ExposureVisual ExposureR

enu

mb

er

Rad

iate

1)1) The procedure first determines the individual suitabilityThe procedure first determines the individual suitability for the routing criteriafor the routing criteria……

DiscreteCost

Discrete CostDiscrete Cost

……2) 2) then identifies thethen identifies the combined suitabilitycombined suitability for each map locationfor each map location……A

vera

ge

THISplace

Accum Cost

Accumulated CostAccumulated Cost……3) 3) then accumulates costs from a starting location to all other locationsthen accumulates costs from a starting location to all other locations……

Sp

read

THATplace

HighwayCorridor

Optimal Optimal PathPath

……4)4) and finally identifies and finally identifies minimum cost route as the steepest downhill pathminimum cost route as the steepest downhill path..

Str

eam

An Analytic Framework for GIS ModelingAn Analytic Framework for GIS Modeling

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Table 1Table 1.. Cross-listing to Further Reading ResourceCross-listing to Further Reading Resource

An Analytic Framework for GIS ModelingAn Analytic Framework for GIS Modeling

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Continued…