Geographic Information Systems Flashcards
7 cards from real CEP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Geographic Information Systems flashcards as text
Which GIS data model represents geographic features as a continuous surface divided into equal-sized cells?
Answer: Raster model
The raster model divides space into a grid of equal-sized cells, each storing an attribute value, making it ideal for continuous surfaces like elevation or temperature.
In GIS, what does the term 'topology' primarily refer to?
Answer: The spatial relationships between geographic features
Topology defines the spatial relationships between features, such as adjacency, connectivity, and containment, ensuring data integrity in vector datasets.
A planner needs to identify all parcels within 500 feet of a proposed industrial facility. Which GIS operation is most appropriate?
Answer: Buffer
A buffer operation creates a zone of specified distance around a feature, allowing identification of all parcels within 500 feet of the facility.
What is the primary purpose of a geodatabase in GIS?
Answer: To store, manage, and query spatial and attribute data in a structured format
A geodatabase is a structured container for storing geographic datasets, supporting spatial relationships, domains, and rules for data integrity.
Which map projection preserves area and is most suitable for thematic maps showing regional distribution of environmental data?
Answer: Albers Equal-Area Conic
The Albers Equal-Area Conic projection preserves area relationships, making it ideal for thematic maps where accurate size comparison between regions is important.
In remote sensing, what does NDVI measure?
Answer: Vegetation health and density
The Normalized Difference Vegetation Index (NDVI) uses near-infrared and red bands to quantify vegetation health and density, ranging from -1 to +1.
Which spatial analysis technique identifies areas where multiple environmental constraints overlap to find the best site for a facility?
Answer: Weighted overlay suitability analysis
Weighted overlay suitability analysis combines multiple raster layers, each representing a constraint or opportunity, to identify optimal locations for facilities.