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Introduction to GIS

Introduction to GIS

Geographic Information Systems (GIS) are tools for storing, analyzing, and displaying spatial data alongside related attributes. Unlike traditional information systems that address general queries, GIS incorporates spatial components, enabling users to answer "where" and "how far." For example, GIS can process housing data linked to geographic locations like zip codes, allowing insights into population density or housing distribution through thematic maps.GIS integrates technologies such as...

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GIS manipulation and analysis functions are vital for decision-making and planning. These activities range from data retrieval tasks, such as selecting information based on specific criteria, to advanced analytical techniques that address complex spatial problems.One critical GIS analysis method is overlaying, which combines multiple data layers to examine impacts. For example, overlaying a river-dammed lake boundary with road networks can identify affected infrastructure. Another common...

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Geographic Information Systems (GIS) rely on two core types of data: spatial data and attribute data.Spatial DataSpatial data defines the physical location of features within a coordinate system, typically expressed in terms of latitude and longitude. It provides precise positioning for elements like roads, rivers, or buildings.Attribute DataAttribute data complements spatial data by adding descriptive information about these features. For example, a road's spatial data includes its start and...

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Radiation Planning Assistant - A Web-based Tool to Support High-quality Radiotherapy in Clinics with Limited Resources

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A method to determine spatial access to specialized palliative care services using GIS.

Jonathan Cinnamon¹, Nadine Schuurman, Valorie A Crooks

¹Department of Geography, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6, Canada. jca80@sfu.ca

BMC Health Services Research

|July 2, 2008

Summary

Access to specialized palliative care varies significantly across British Columbia. Over half the population in the Northern Health Authority lacks reasonable travel time access, highlighting a need for strategic service location analysis.

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Area of Science:

Health Services Research
Geographic Information Systems (GIS)
Palliative Care

Background:

Global aging populations increase demand for palliative care.
Existing palliative care services are often inadequate and unevenly distributed.
There's a critical need to identify underserved populations for specialized palliative care.

Purpose of the Study:

To assess spatial access to specialized palliative care in British Columbia.
To identify populations lacking reasonable travel time access to these services.

Main Methods:

Calculated service catchments based on real road travel times.
Linked census population data to road networks using postal codes.
Determined the percentage of the population over one hour travel time from specialized palliative care.

Main Results:

81% of British Columbia's population is within one hour of a specialized palliative care service.
Spatial access disparities exist across regional health authorities.
Over 50% of the Northern Health Authority's population lacks reasonable spatial access.

Conclusions:

Strategic location analysis is crucial for optimizing palliative care service placement.
Improved spatial access can reduce travel burdens for patients and providers.
These methods offer a rational approach for health resource allocation and planning.