How Is Location/Latitude/Longitude Determined?

[Michael Camponovo]

My name is Michael Camponovo and I am a graduate student at the University of New Mexico in the geography department. For my thesis I would like to compare different aspects of quality between volunteered geographic information (VGI) and authoritative sources. In particular, I am interested in positional accuracy, temporal accuracy, completeness, and attribute accuracy in relation to the Haiti earthquake of 2010. I am planning on using methods outlined in research articles by Muki Haklay at the University College London (please see below for a list of his relevant research articles). Does anyone know if it is possible to determine how the position of a report is determined from the CSV from the Ushahidi Haiti site? I know that in many cases the location was determined by reading the content of the actual report, but were they ever determined based on cellular signal triangulation, GPS, or some other technique? I can't seem to find that information in the CSV. If that information is contained within the individual original reports, are those reports available?

Thank you for any help you can provide.

Michael Camponovo

Graduate Research Assistant

Department of Geography

University of New Mexico

Department of Geography

Bandelier West Room 111, MSC01 1110

1 University of New Mexico

Albuquerque, NM 87131-0001

Phone: 1-505-277-5041

FAX: 1-505-277-3614

Haklay, M. 2010. How good is volunteered geographical information? A comparative 

study of OpenStreetMap and Ordnance Survey datasets. Environment and Planning B-Planning & Design 37 (4):682-703.

Haklay, M., S. Basiouka, V. Antoniou, and A. Ather. 2010. How Many Volunteers Does 

it Take to Map an Area Well? The Validity of Linus' Law to Volunteered Geographic Information. Cartographic Journal 47 (4):315-322.

Haklay, Mordechai, and Claire Ellul. 2010. Completeness in volunteered geographical 

information the evolution of OpenStreetMap coverage in England (2008-­2009) Journal Of Spatial Information Science.

[Heather Leson]

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Heather Leson
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