GIS 201 chapter 14

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Author:
dtarasov
ID:
103567
Filename:
GIS 201 chapter 14
Updated:
2011-09-22 11:00:21
Tags:
geodatabases
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Description:
Terms and concepts from chapter 14 of the Price text.
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  1. What are the 3 types of geodatabases?
    • Personal
    • File
    • SDE
  2. What are the characteristics of a personal geodatabase?
    • Designed for use by individuals or small workgroups
    • Stored in a single Microsoft Access file
    • Limited to 2 GB in size
    • Works only in the Windows operating system
  3. What are the characteristics of a file geodatabase?
    • Designed for use by individuals and small workgroups
    • Each data set stored as a separate file within a system folder
    • Limited to 1 terabyte in size
    • Works with different operating systems
  4. What are the characteristics of an SDE geodatabase?
    • Designed for many users or large workgroups
    • Stores GIS data within one of several commercial RDBMSs (such as Oracle, SQLServer, or IBM Informix)
    • AKA organizational databases or enterprise GIS
    • Requires a software package called the Arc Spatial Database Engine (ArcSDE) to translate geographic data into a consistent and customized format in the large database.
  5. What is a feature dataset?
    A collection of related feature classes with the same coordinate system.
  6. What is the database schema?
    The design and structure of a database, incl. the datasets and feature classes, the fields in the tables, the standalone tables, the relationships between them, and other objects.
  7. What are the 2 components of the spatial reference?
    Domain and resolution.
  8. What are the 2 types of domains?
    • Range (specifies the lowest and highest possible values but allows anything in between)
    • Coded (allows only certain specific values)
  9. What are the 3 types of split policy?
    • Default (both split feature attributes contain the default value established for that field)
    • Duplicate (both features retain the value of the original feature)
    • Geometry Ratio (new value is assigned based on the relative size of the original and split features)
  10. What are subtypes?
    Formal classes of features within a layer.
  11. What is annotation?
    A feature class that stores labels.
  12. With feature-linked annotation, will deleting the feature delete the annotation?
    Yes, and vice versa.

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