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Questions and Answers
GIS stands for Geographic Information Software.
False
Raster data in GIS is mainly text-based information.
False
Geographic data can include features like roads and country boundaries.
True
People at CDC do not use GIS to study the impact of location on disease and disability.
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Analysis in GIS involves using non-spatial data to answer questions.
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GIS hardware includes physical computers where the software runs.
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Study Notes
Geographic Information Systems (GIS)
- GIS is a computer-based tool used to store, visualize, analyze, and interpret geographic data.
- Geographic data, also known as spatial or geospatial data, identifies the geographic location of features.
- Examples of geographic data include roads, country boundaries, and addresses.
GIS Applications
- At the CDC, GIS is used to help answer questions about how location impacts disease and disability.
- Researchers use GIS to explore a variety of topics, such as identifying how to target polio immunization campaigns in geographically isolated locations.
Pieces of GIS
- People: collect data, develop procedures, identify research questions, and define analysis tasks to run in GIS.
- Data: consists of two main types: vector data and raster data.
Vector Data
- Includes spatial features (points, lines, and polygons) and attributes about that data (descriptive information).
Raster Data
- Stored electronic images (e.g., pictures taken as an aerial photograph or satellite images).
Analysis
- The process of using spatial data to answer questions.
- Many different analysis techniques are used.
Hardware
- GIS software is run on computers.
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Description
Test your knowledge on geographic information systems (GIS) and geographic data, including concepts like storing, visualizing, and analyzing spatial data. Learn about the different types of geographic data and their applications in fields like public health.
