A geographic information system is a system designed to capture, store, manipulate, analyze, manage, and present all types of geographical data. GIS is the merging of cartography, statistical analysis and database technology that allow the creation of interactive queries, analyses of spatial information, data editing in map and presentation of the results of all these operations.

GIS provides value-added analyses to enhance the understanding of research findings by empowering the statistical data with geographic information. The following examples show GIS applications in projects conducted by Policy 21.


Family Survey 2011 by Home Affairs Bureau:

Analysis of the findings at the district level is facilitated through the use of GIS. For instance, the survey data on the percentage of respondents who were satisfied with family life for different districts are depicted in the map shown below.

Family Survey Report 2011 (PDF)

2009 Injury Surveillance Report by Kwai Tsing Safe
Community and Health City Association:

The injury surveillance system captures data on injuries presented at the Accident and Emergency Department (AED) of Princess Margaret Hospital (PMH). An injury map was produced to show the prevalence of different types of injuries at different locations in the district. In this study, an advanced spatial statistics tool, namely Hot Spot Analysis, is used to analyze hot spots of serious traffic injury cases. Another geoprocessing tool, namely Multiple Ring Buffer, is used to visualize the spatial clustering.

2009 Injury Surveillance Report (PDF)
2010 Injury Surveillance Report (PDF)

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