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19 Cards in this Set
- Front
- Back
- 3rd side (hint)
Object-based Vector data model
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stores spatial and attribute data in same system. Treats spatial data as objects.
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Property
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describes an attribute or characteristic of an object.
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Method
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performs a specific action.
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Association
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set of objects with similar attributes.
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Aggregation
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defines how many instances of one class can be associated with the other class through multiplicity expressions at both ends of the relationship. (i.e. address associated with one zip code but many apartments)
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Composition
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describes the whole-part relationship between classes. (i.e. census tract aggregate of number of census blocks)
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Type Inheritance
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in a composition relationship solely owns the part. (i.e. highway controls lifetime of roadside rest area.)
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Instantation
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defines relationship between superclass and subclass, but subclass can have additional properties (i.e. residential area is member of built-up area but has unique properties such as lot size)
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Feature Class
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object of a class can be created from an object of another class. (i.e. high density residential area object can be created from a residential area object).
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Feature Dataset
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stores spatial data of the same geometry type
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Interface
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represents a set of externally visible operations of an object. These objects can have properties and methods that are hidden in the object.
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Encapsulation
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refers to the mechanism that is used to hide the properties and methods of an object so that the object can only be accessed through the predefined interfaces.
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Inheritance
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Means that an object inherits properties and methods from the class to which the object belongs.
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Polymorphism
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means that the same method can produce different effects, depending on the kind of object to which the method is being applied.
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ArcGIS Four general validation rules for grouping of objects:
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Attribute Domains, Relationship Rules, Connectivity Rules, Custom Rules
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*NOT AVAILABLE IN COVERAGE MODEL, ONLY GEODATABASE
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Attribute Domains
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group objects into subtypes by a valid range of values or a valid set of values for an attribute.
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Relationship Rules
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rules such as topology rules connect objects that are associated.
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Connectivity Rules
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let users build geometric networks such as streams, roads, and water and electric utilities.
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Custom Rules
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allow users to create custom features for advanced applications.
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