Attribute Data

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Graduate

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14 Terms

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Row
Represents a spatial object
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Tables
Are defined for each class of object and contains a key (ID)
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Attribute data
describes the characteristics of spatial features
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Feature ID (FID)
A particular type of key that links spatial data with attribute data.
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Columns
Values are of the same type and the titles are unique
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Relational Database
A collection of tables defined for each class of objects describing the same subject
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One-to-One relationship
A parcel can have only one legal description
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One-to-Many relationship
A parcel can have multiple buildings associated with it
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Many-to-Many relationship
A given property may have many owns and a given owner may have
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Nominal
Categories only
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Ordinal
Ordered categories
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Ratio
Natural 0, ratios are meaningful
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Interval
Differences matter but no natural 0
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Spatial queries
search for and select a subset of features and table records.