Abstract
Informal settlements pose a continuing health concern. While spatial methodologies have proven to be valuable tools to support health interventions, several factors limit their widespread use in these challenging environments. One such technology, spatial video, has been used for fine-scale contextualized mapping. In this paper, we address one of the limitations of the technique: the global positioning system (GPS) coordinate error. More specifically, we show how spatial video coordinate streams can be corrected and synced back to the original video to facilitate risk mapping. Past spatial video collections for the Mathare informal settlement of Kenya are used as an illustration as these data had been previously discarded because of excessive GPS error. This paper will describe the bespoke software that makes these corrections possible, and then will go on to investigate patterns in the coordinate error.
Highlights
Informal settlements (IS) pose a considerable global challenge as they are the sites of multiple health, environmental, and social problems
During the period August 2013 to October 2015, 26 handheld spatial video (SV) were collected in the Mathare informal settlement of Kenya
This graphic intersections, which can be used for environmental change comparisons and global positioning system (GPS) path validations
Summary
Informal settlements (IS) pose a considerable global challenge as they are the sites of multiple health, environmental, and social problems. They are constantly changing and are data poor. To counter this spatial data deficiency, public health or epidemiological initiatives often rely on global positioning system (GPS) support. One example of a geospatial technology that has been used in challenging environments is spatial video (SV). One problem influencing SV use is the GPS error caused by the typical type of IS built environment. These errors are especially problematic as SV requires spatial precision when mapping the video. If the coordinate connected to a video frame is wrong, so too will be the final digitized map
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