Balloon based geo-referenced digital photo technique : a low cost high-resolution option for developing countries
Seang, Teng Peng & Jan-Peter Mund
The paper introduces and assesses the highly efficient amateur aerial balloon photo technique which makes aerial photos affordable at a price of 0.10 0.35 US cents per hectare. The idea is to provide an inexpensive but quality efficient solution for recent aerial color photos on a high pixel resolution as orthophotos are not always accessible in Cambodia. Other high resolution images from advanced scanners like Quickbird, Ikonos or others are most likely unaffordable due to insufficient decentralized budget in Cambodia. As a consequence topographical and other spatial data is more or less lacking in planning offices. Enhancement and modifications basically are not easy to integrate into smaller scaled planning resources. This modern technique is based on a simple plastic balloon (r=3m), inflated with hydrogen gas, chemically produced on the site and adapted to the conditions in developing countries especially for areas with rapid land use changes. In Cambodia, it is offered by a private geospatial company, the Phnom Penh Geoinformatics Education Centre (PGEC) in collaboration with the Faculty of Land Management and Land Administration at the Royal University of Agriculture.
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