Use of satellite imagery in constructing a household GIS database for health studies in Karachi,Pakistan |
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Authors: | Mohammad?Ali mailto:mali@ivi.int" title=" mali@ivi.int" itemprop=" email" data-track=" click" data-track-action=" Email author" data-track-label=" " >Email author,Shahid?Rasool,Jin-Kyung?Park,Shamoon?Saeed,Rion?Leon?Ochiai,Qamaruddin?Nizami,Camilo?J?Acosta,Zulfiqar?Bhutta |
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Affiliation: | (1) International Vaccine Institute, SNU Research Park, San 4–8 Bongcheon-7 dong, Kwanak-gu, Seoul, Korea;(2) Pediatric Department, Aga Khan University, Karachi, Pakistan;(3) Techno-Consult International, Karachi, Pakistan |
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Abstract: |
Background Household-level geographic information systems (GIS) database are usually constructed using the geographic positioning system (GPS). In some research settings, GPS receivers may fail to capture accurate readings due to structural barriers such as tall buildings. We faced this problem when constructing a household GIS database for research sites in Karachi, Pakistan because the sites are comprised of congested groups of multi-storied building and narrow lanes. In order to overcome this problem, we used high resolution satellite imagery (IKONOS) to extract relevant geographic information. |
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