Getting Started with the Geodatabase

Question 1

What is used as file structure to primarily to store, query, and manipulate spatial data) is a powerful data model for storing and managing your GIS data in one place. You can import different datasets from various sources and use them in your GIS analysis.

Answer 1

The geodatabase

Question 2

What type of different data sources can be imported into a geodatabase?

Answer 2

vector data, raster data, tabular data, and attachments.

Question 3

What are some Geodatabase advantages?

Answer 3

Centralized repository, Scalable data model, Increased data integrity, & Support for imagery

Question 4

What are two types of geodatabases?

Answer 4

File and Enterprise Geodatabases

Question 5

What is a collection of GIS datasets and is stored in a file system folder. They work across operating systems and can store individual datasets up to 1 terabyte (TB) in size by default. The size limit can be increased with keywords to 256 TB. They support multiple people editing different feature classes or tables at the same time.

Answer 5

file geodatabase

Question 6

What supports versioning and replication. They require a database management system (DBMS), such as DB2, Informix, Microsoft SQL Server, Oracle, or PostgreSQL.
Typically found in larger organizations, they support multiple users viewing and editing the GIS database at the same time. In fact, they allow for unlimited editors and database size.

Answer 6

Enterprise geodatabases

Question 7

At its most basic level, what is a container that stores spatial and attribute data?

Answer 7

the geodatabase

Question 8

The main purpose is to store spatially related feature classes in a common dataset for building a topology, a network dataset, a terrain dataset, or a geometric network is what?

Answer 8

Feature dataset

Question 9

Which types of feature classes have both a Shape field and Shape_Length field?

Answer 9

Polygon and line feature classes

Question 10

Geodatabases have a comprehensive information model for representing and managing geographic information. What is the creation workflow?

Answer 10

1. Evaluate data
2. Create geodatabase
3. Organize data
4. Add data

Question 11

What data model within a geodatabase that is used to store, manage, view, and query large collections of raster data?

Answer 11

Mosaic dataset

Question 12

What is useful for the following actions:
1) Managing, querying, and visualizing large collections of raster data, including multidimensional, overlapping, and temporal data.
2) Controlling the display or the ordering of rasters.
3) Performing on-the-fly processing, which occurs as the rasters are accessed; the source pixels are not altered or converted.

Answer 12

Mosaic datasets

Question 13

Recommendations with mosaic dataset

Answer 13

1) Use a mosaic dataset to provide a single comprehensive system to organize your raster data. 2) Ensure that your raster datasets are readable before managing them with a mosaic dataset. 3) Consider preprocessing your data (build pyramids, calculate statistics, and so on) before managing it with a mosaic dataset. 4) Use the WGS 1984 Web Mercator Auxiliary projection when you create mosaic datasets for use on the web.

Question 14

T/F: Images loaded into a mosaic dataset must not overlap or touch.

Answer 14

False

Question 15

What are some of the objects that you can store in a file geodatabase?

Answer 15

Several objects can be stored in a file geodatabase: feature classes, feature datasets, nonspatial attribute tables, and mosaic datasets.

Question 16

When you import a shapefile, CAD dataset, or coverage, is the spatial reference imported along with the data?

Answer 16

Yes. When importing shapefiles, CAD datasets, and coverages, the spatial reference is imported along with the data.

Question 17

Can you add data to an empty feature class?

Answer 17

Yes. You can add data to an empty feature class. You can also add data to a feature class that already contains data.