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Practical mapping example

Case Study PHFI

This step provides more information on the CArdiometabolic Risk Reduction in South Asia (CARRS) Study that we also provided information on in previous steps.

In this study on Cardiometabolic diseases, mapping and visualization was a major part of our project. We used the data to locate and map the households and points of interest and also to visualize the coverage of health care facilities among other things.

We used point maps to indicate the location of the households that we collected using GPS during the household survey. It was important for us to evaluate the distribution of these points in space. This can ensure that we have a good spatial distribution of the households in our survey. By showing these points with a background image from google earth it was easy to relate the collected data to the direct environment. We could immediately see that some areas were highly built-up (few green areas) and other locations were close to parks or rivers. This way of visualization already provided us with a lot of information even before starting the actual analysis. We often displayed the points together with the boundaries of administrative zones. In this way, we can see the total study area together with our household points. Orientation is far easier this way. In the picture you immediately see that we did not collect any points in the Center or South West of New Delhi.

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This article is from the free online course:

Geohealth: Improving Public Health through Geographic Information

University of Twente

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