GIS Geospatial Data Fundamentals 2

Question 1

Which data model represents geographic features as a continuous grid of cells, each with an assigned value?

Accepted Answer

Raster

Answer

Raster data divides space into a regular grid of cells (pixels), each storing a value such as elevation or land cover type.

Question 2

What term describes the minimum distance between two distinguishable features in a raster dataset?

Accepted Answer

Spatial resolution

Answer

Spatial resolution defines the smallest feature a raster can represent, typically expressed as cell size (e.g., 30 meters per pixel).

Question 3

In GIS, what does a 'topology' define?

Accepted Answer

Spatial relationships and connectivity rules between features

Answer

Topology encodes the spatial relationships (adjacency, connectivity, containment) among vector features and enforces rules like 'no gaps between polygons.'

Question 4

Which attribute type is best suited for storing a street address in a GIS attribute table?

Accepted Answer

Text/String

Answer

Street addresses contain alphanumeric characters that cannot be stored as numeric types, so a text/string field is required.

Question 5

What is the purpose of a spatial index in a GIS database?

Accepted Answer

To speed up spatial queries by organizing feature locations

Answer

A spatial index (e.g., R-tree) organizes feature bounding boxes so the database can quickly locate features without scanning every record.

GIS - Geographic Information System Practice Test

GIS - Geographic Information System Practice Test

GIS Geospatial Data Fundamentals 2