Lecture 4 Flashcards
What is the first task of spatial data infrastructure ?
it is to inventory who has what data of what type and quality
Metadata Inventory
provides documentation of existing internal geo spatial resources within an organization
MetaData Catalog
Permits structured search and comparison of held geo spatial resources by others
MetaData Documentations
Provides end users with adequate information to take the resource and apply it in an appropriate context
File Geodatabases
stores multiple files in a folder with an .gdb extension. single flied with up to 256 TB
Mobile Geodatabase
stores in an SQLite database that is contained in 1 file has .gdb extension
Enterprise Geodatabases
Multiuser geodatabase stored in a relational databases. it has unlimited users and size but depends on the DBMS vendor
Schema
defined in the Catalog tab which allows to convert data from other formats such as Shapefile, Coverage, CAD and Raster
Versioning
provides multiple representations of the data without copying data, allows concurrent editing, and allows users to have versions for extended periods of time.
what 2 types of versioning
Branch and Traditional
Feature Dataset
a container object for other datasets, contain geometric networks
Attribute rules
are a set of, well, rules that you can apply to a database. These rules can perform different actions and have different triggers.
Attribute rule types
Calculation, Constraint and Validation
Constraint rule
WILL NOT let an incorrect value into the database
Validation rule
WILL let an incorrect value into the database but will be flagged during evaluation
Domains
Describe the legal values of a field type used to ensure attribute integrity and is defined to the geodatabase level
what are the types of domains are there?
Range and Coded Values
Range
have valid values between a min / max range
Coded Value
Valid values chosen from a set list
Subtypes
Categorize objects or features into groups which share the same attributes, they are defined at a class level
Relationship Classes
Association between object is in one class and another
Annotation feature classes
placing text and graphics on the map using feature linked or non- feature linked
Dimension Features
Type of annotation that displays specific distances on a map. These Graphic features are stored in a dimension feature class
Relationship Classes
Control the general and network relationships in which an object can participate.
Dimensions and Annotation
nstantiate classes with predefined behavior.
Subtypes
Partitions the objects into like groups
Domains
Control the default value and acceptable values for any attribute
