All Flashcards
What is map projection distortion?
Distortion is inevitable when projecting a 3D sphere onto a 2D surface; it affects shape, area, distance, or direction.
Explain the Mercator projection.
Preserves shape and direction, but distorts area; useful for navigation.
Explain the Robinson projection.
A compromise projection that minimizes overall distortion; good for general use.
Explain the Gall-Peters projection.
Preserves area, but distorts shape; useful for showing relative size.
What is the importance of spatial information?
Crucial for many AP Human Geo topics; it's the foundation for understanding relationships between things in space.
Explain the concept of trilateration in GPS.
GPS receivers calculate their distance from multiple satellites to determine their position.
What is the role of data input in GIS?
Importing spatial data from various sources into the GIS system.
What is the role of data storage in GIS?
Organizing spatial data into layers within the GIS system.
What is the role of data analysis in GIS?
Using tools to analyze spatial patterns and relationships within the GIS system.
What is the role of data output in GIS?
Creating maps, reports, and other visualizations from the GIS system.
Explain the difference between vector and raster data.
Vector data uses points, lines, and polygons, while raster data uses grid cells.
What is the purpose of census data?
To understand the characteristics of populations for policy-making and resource allocation.
What are the causes and effects of map projection distortion?
Cause: Projecting a 3D sphere onto a 2D surface. Effect: Distortion of shape, area, distance, or direction.
What are the causes and effects of using census data?
Cause: Need for population characteristics. Effects: Informing policy decisions, allocating resources, planning for the future.
Compare reference maps and thematic maps.
Reference maps show locations; thematic maps tell a story about a place.
Compare large scale and small scale maps.
Large scale maps show small areas with great detail; small scale maps show large areas with less detail.