503 Spatial File Types - Vector

Question 1

What is a shapefile used for?

Answer 1

Storing vector spatial data

Question 2

What are the 4 things stored in a shapefile?

Answer 2

Feature geometry
Attribute data
Projection info
Metadata

Question 3

Can a shapefile store multiple types of vector data?

Answer 3

No

Question 4

What is a geodatabase?

Answer 4

Object model based spatial database

Question 5

What does a geodatabase contain (4)?

Answer 5

Vector/raster/tabular data
Topologies
Attachments
Relationships between data sources

Question 6

What does a relational database management system (RDMS) accomplish (2)?

Answer 6

Versioning
Integration with other database systems

Question 7

What does a GeoJSON do?

Answer 7

encodes points/lines/polygons using JSON

Question 8

What kinds of apps is a GeoJSON used for?

Answer 8

web mapping apps

Question 9

What is a GML file (spelled out/use)?

Answer 9

Geography markup language
Used for storing geographic info in text format

Question 10

What does KML stand for and what is its typical use?

Answer 10

Keyhole Markup Language
Google Earth

Question 11

What are CAD files used for and where do they come from?

Answer 11

AutoCAD
Represent 2D/3D objects

Question 12

What does DTM stand for?

Answer 12

Digital terrain model

Question 13

What is a DTM used for?

Answer 13

Elevation data without influence of vegetation/surface features

Question 14

What are 3 advantages of vector datasets?

Answer 14

1. represent feature locations accurately
2. efficient storage
3. supports topology

Question 15

What are 2 disadvantages of vector datasets?

Answer 15

1. harder for people to understand than raster
2. overlaying vector datasets can be computationally intensive