Articles | Volume 15, issue 5
https://doi.org/10.5194/bg-15-1549-2018
https://doi.org/10.5194/bg-15-1549-2018
Technical note
 | 
15 Mar 2018
Technical note |  | 15 Mar 2018

Technical note: A simple approach for efficient collection of field reference data for calibrating remote sensing mapping of northern wetlands

Magnus Gålfalk, Martin Karlson, Patrick Crill, Philippe Bousquet, and David Bastviken

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Cited articles

Belward, A. S. and Skøien, J. O.: Who launched what, when and why; trends in global land-cover observation capacity from civilian earth observation satellites, ISPRS J. Photogramm., 103, 115–128, 2015. 
Booth, D. T., Cox, S. E., Meikle, T. W., and Fitzgerald, C.: The accuracy of ground cover measurements, Rangeland Ecol. Manag., 59, 179–188, 2006a. 
Booth, D. T., Cox, S. E., and Berryman, R. D.: Point sampling digital imagery with “SamplePoint”, Environ. Monit. Assess., 123, 97–108, 2006b. 
Bäckstrand, K., Crill, P. M., Jackowicz-Korczyñski, M., Mastepanov, M., Christensen, T. R., and Bastviken, D.: Annual carbon gas budget for a subarctic peatland, Northern Sweden, Biogeosciences, 7, 95–108, https://doi.org/10.5194/bg-7-95-2010, 2010. 
Chen, Z., Chen, W., Leblanc, S. G., and Henry, G. H. R.: Digital Photograph Analysis for Measuring Percent Plant Cover in the Arctic, Arctic, 63, 315–326, 2010. 
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We describe a quick in situ method for mapping ground surface cover, calculating areas of each surface type in a 10 x 10 m plot for each measurement. The method is robust, weather-independent, easily carried out, and uses wide-field imaging with a standard remote-controlled camera mounted on a very long extendible monopod from a height of 3–4.5 m. The method enables collection of detailed field reference data, critical in many remote sensing applications, such as wetland mapping.
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