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Christoph Perger
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Mapping global cropland and field size
S Fritz, L See, I McCallum, L You, A Bun, E Moltchanova, M Duerauer, ...
Global change biology 21 (5), 1980-1992, 2015
5472015
Geo-Wiki. Org: The use of crowdsourcing to improve global land cover
S Fritz, I McCallum, C Schill, C Perger, R Grillmayer, F Achard, F Kraxner, ...
Remote Sensing 1 (3), 345-354, 2009
4022009
Geo-Wiki: An online platform for improving global land cover
S Fritz, I McCallum, C Schill, C Perger, L See, D Schepaschenko, ...
Environmental Modelling & Software 31, 110-123, 2012
3602012
Assessing the accuracy of volunteered geographic information arising from multiple contributors to an internet based collaborative project
GM Foody, L See, S Fritz, M Van der Velde, C Perger, C Schill, DS Boyd
Transactions in GIS 17 (6), 847-860, 2013
1642013
Comparing the quality of crowdsourced data contributed by expert and non-experts
L See, A Comber, C Salk, S Fritz, M Van Der Velde, C Perger, C Schill, ...
PloS one 8 (7), e69958, 2013
1632013
Using control data to determine the reliability of volunteered geographic information about land cover
A Comber, L See, S Fritz, M Van der Velde, C Perger, G Foody
International Journal of Applied Earth Observation and Geoinformation 23, 37-48, 2013
1472013
A global dataset of crowdsourced land cover and land use reference data
S Fritz, L See, C Perger, I McCallum, C Schill, D Schepaschenko, ...
Scientific data 4 (1), 1-8, 2017
1462017
Development of a global hybrid forest mask through the synergy of remote sensing, crowdsourcing and FAO statistics
D Schepaschenko, L See, M Lesiv, I McCallum, S Fritz, C Salk, ...
Remote Sensing of Environment 162, 208-220, 2015
1422015
Cropland for sub‐Saharan Africa: A synergistic approach using five land cover data sets
S Fritz, L You, A Bun, L See, I McCallum, C Schill, C Perger, J Liu, ...
Geophysical Research Letters 38 (4), 2011
1152011
Building a hybrid land cover map with crowdsourcing and geographically weighted regression
L See, D Schepaschenko, M Lesiv, I McCallum, S Fritz, A Comber, ...
ISPRS Journal of Photogrammetry and Remote Sensing 103, 48-56, 2015
1132015
Downgrading recent estimates of land available for biofuel production
S Fritz, L See, M Van Der Velde, RA Nalepa, C Perger, C Schill, ...
Environmental science & technology 47 (3), 1688-1694, 2013
1022013
Downgrading recent estimates of land available for biofuel production
S Fritz, L See, M Van Der Velde, RA Nalepa, C Perger, C Schill, ...
Environmental science & technology 47 (3), 1688-1694, 2013
1022013
Accurate attribute mapping from volunteered geographic information: issues of volunteer quantity and quality
GM Foody, L See, S Fritz, M Van der Velde, C Perger, C Schill, DS Boyd, ...
The Cartographic Journal 52 (4), 336-344, 2015
922015
Crowdsourcing in-situ data on land cover and land use using gamification and mobile technology
JC Laso Bayas, L See, S Fritz, T Sturn, C Perger, M Dürauer, M Karner, ...
Remote Sensing 8 (11), 905, 2016
822016
Assessing quality of volunteer crowdsourcing contributions: lessons from the Cropland Capture game
CF Salk, T Sturn, L See, S Fritz, C Perger
International Journal of Digital Earth 9 (4), 410-426, 2016
752016
The Forest Observation System, building a global reference dataset for remote sensing of forest biomass
D Schepaschenko, J Chave, OL Phillips, SL Lewis, SJ Davies, ...
Scientific data 6 (1), 198, 2019
642019
Harnessing the power of volunteers, the internet and Google Earth to collect and validate global spatial information using Geo-Wiki
L See, S Fritz, C Perger, C Schill, I McCallum, D Schepaschenko, ...
Technological Forecasting and Social Change 98, 324-335, 2015
642015
A global reference database of crowdsourced cropland data collected using the Geo-Wiki platform
JC Laso Bayas, M Lesiv, F Waldner, A Schucknecht, M Duerauer, L See, ...
Scientific data 4 (1), 1-10, 2017
622017
Recent advances in forest observation with visual interpretation of very high-resolution imagery
D Schepaschenko, L See, M Lesiv, JF Bastin, D Mollicone, ...
Surveys in Geophysics 40, 839-862, 2019
492019
A campaign to collect volunteered geographic Information on land cover and human impact
C Perger, S Fritz, L See, C Schill, M Van der Velde, I McCallum, ...
GI_Forum, 83-91, 2012
432012
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