3 Questions
What is the purpose of a spatial index in a geodatabase?
To quickly locate features when performing tasks such as panning, zooming, or selecting features
How are feature classes with polygon geometry stored in the geodatabase?
As tables, with each row representing one feature
What is the function of system tables in a geodatabase?
To contain and manage all the metadata required to implement geodatabase properties, data validation rules, and behaviors
Study Notes
- A geodatabase is a system that stores, queries, and manipulates geographic information and spatial data.
- Tables are the basic storage objects in the geodatabase, with feature classes containing spatial attributes.
- A spatial index is used to quickly locate features when performing tasks such as panning, zooming, or selecting features.
- The geodatabase uses the spatial reference to accurately display a feature's location and carry out geoprocessing functions.
- Configuration keywords specify how data is stored in the geodatabase to optimize storage parameters.
- Feature classes with polygon geometry are stored as tables, with each row representing one feature.
- Within the geodatabase, there are system tables and dataset tables that manage data and metadata.
- System tables describe the geodatabase schema that specifies all dataset definitions, rules, and relationships.
- System tables contain and manage all the metadata required to implement geodatabase properties, data validation rules, and behaviors.
- SQL can be used to access the contents of the feature class table, including the shape when stored as a SQL spatial type.
Are you familiar with geodatabases and spatial data? Test your knowledge with this quiz! Learn about the basic storage objects, spatial indexing, configuration keywords, and more. See if you know how feature classes with polygon geometry are stored, and how SQL can be used to access feature class tables. Take the quiz now and discover how much you know about geodatabases!
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