Spatial Modeling GIS

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11 Terms

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GIS Model 

A spatial representation of reality 

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Data models 2

Raster and Vector

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Raster Data

Rough regilar array of grid cells or pixels

  • One attributes value per pixel

Not to big, not to small

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Vector Data

Points, lines, or polygons

  • Many attributes

Vector Topology

  • contact

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NLCD

Raster for land

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SSURGO

vector for soil

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3DEP AND NED

Raster for elevation 

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NHD

vector for hydrology

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CDL

Raster for crops

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GNIS

Vextor for GIS names 

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Catography Models

Describe or predict a phenomenon 

  • Analysis

  • Overlay

  • Tools

  • Builder