Questions and Answers
What are the advantages of using a Geodatabase? (Select all that apply)
What are the two types of Geodatabases?
File geodatabase and Enterprise geodatabase
What is a file geodatabase?
A collection of GIS datasets stored in a file system folder, which supports datasets up to 1 TB by default.
What is an Enterprise geodatabase?
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What are the steps that comprise the geodatabase creation workflow?
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What is a feature class?
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What is the main purpose of a feature dataset?
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When you create a feature dataset, you must specify ____________________.
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At its most basic level, the geodatabase is a container that stores __________ and ______________ data.
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The schema of the geodatabase defines _____________________ along with _________, _________________, and _________________ of each ____________ within the geodatabase.
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After you have created a schema that will work with your analysis, can you share the schema with other geodatabases?
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What is a mosaic dataset?
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What are the layers that a mosaic dataset displays as in ArcGIS Pro?
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Study Notes
Advantages of Using a Geodatabase
- Centralized repository: Data is stored in one location rather than multiple files.
- Scalable data model: Capable of accommodating increased GIS demands by migrating to an upgraded format.
- Increased data integrity: Spatial and attribute behaviors help reduce data entry errors and maintain relationships.
- Support for imagery: Mosaic datasets facilitate the management of multiple images as a single entity.
Types of Geodatabases
- File geodatabase: Suitable for individual users or small teams, optimized for ArcGIS Pro.
- Enterprise geodatabase: Designed for larger organizations allowing multiple users to interact with data simultaneously.
File Geodatabase
- A collection of GIS datasets stored in a file system folder, compatible across operating systems.
- Default size limit of 1 terabyte (TB); expandable to 256 TB with keywords.
- Enables simultaneous editing by multiple users across different feature classes or tables.
Enterprise Geodatabase
- Requires a Database Management System (DBMS) like DB2, Informix, SQL Server, Oracle, or PostgreSQL.
- Supports versioning and replication suitable for larger organizations with unlimited users and database size.
Geodatabase Creation Workflow
- Evaluate data: Assess which datasets (raster, vector, or tabular) should be imported.
- Create geodatabase: Establish a stable platform for data analysis.
- Organize data: Implement organization using feature datasets for related themes and coordinate systems.
- Add data: Once setup is complete, data can be added for analysis.
Feature Class
- A collection of geographic features sharing the same geometry type (point, line, or polygon), attributes, and spatial reference.
- Can exist independently within a geodatabase or as part of feature datasets.
Feature Dataset Purpose
- Designed to store spatially related feature classes, essential for constructing topologies, network datasets, terrain datasets, or geometric networks.
Feature Dataset Requirements
- Must specify the spatial reference upon creation.
- Can include feature classes of any geometry type, provided they share the same spatial reference.
Geodatabase Basics
- Functions fundamentally as a container for storing both spatial and attribute data.
Geodatabase Schema
- Schema defines the physical structure and includes rules, relationships, properties, and organization of each dataset.
Sharing Schema
- The schema can be exported as an XML file, facilitating sharing with other geodatabases.
Mosaic Dataset
- A data model for managing, viewing, and querying extensive collections of raster data.
- Can contain diverse raster datasets with multiple formats, resolutions, and coordinate systems.
Mosaic Layer in ArcGIS Pro
- In the Contents pane, the mosaic dataset displays as a group layer comprising at least three layers:
- Boundary layer: Shows the boundary of the mosaic dataset.
- Footprint layer: Displays the footprints for each raster dataset.
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Description
These flashcards introduce key concepts of using a Geodatabase in ArcGIS Pro. Explore the advantages of a centralized repository, scalable data models, and enhanced data integrity essential for effective GIS management.
