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Full-Text Articles in Geography
A Platform For Crowdsourcing The Creation Of Representative, Accurate Landcover Maps, Lyndon Estes, D. Mcritchie, J. Choi, S. Debats, T. Evans, W. Guthe, D. Luo, G. Ragazzo, R. Zempleni, K. K. Caylor
A Platform For Crowdsourcing The Creation Of Representative, Accurate Landcover Maps, Lyndon Estes, D. Mcritchie, J. Choi, S. Debats, T. Evans, W. Guthe, D. Luo, G. Ragazzo, R. Zempleni, K. K. Caylor
Geography
Accurate landcover maps are fundamental to understanding socio-economic and environmental patterns and processes, but existing datasets contain substantial errors. Crowdsourcing map creation may substantially improve accuracy, particularly for discrete cover types, but the quality and representativeness of crowdsourced data is hard to verify. We present an open-sourced platform, DIYlandcover, that serves representative samples of high resolution imagery to an online job market, where workers delineate individual landcover features of interest. Worker mapping skill is frequently assessed, providing estimates of overall map accuracy and a basis for performance-based payments. A trial of DIYlandcover showed that novice workers delineated South African cropland …
High-Resolution Mapping Of Time Since Disturbance And Forest Carbon Flux From Remote Sensing And Inventory Data To Assess Harvest, Fire, And Beetle Disturbance Legacies In The Pacific Northwest, Huan Gu, Christopher A. Williams, Bardan Ghimire, Feng Zhao, Chengquan Huang
High-Resolution Mapping Of Time Since Disturbance And Forest Carbon Flux From Remote Sensing And Inventory Data To Assess Harvest, Fire, And Beetle Disturbance Legacies In The Pacific Northwest, Huan Gu, Christopher A. Williams, Bardan Ghimire, Feng Zhao, Chengquan Huang
Geography
Accurate assessment of forest carbon storage and uptake is central to policymaking aimed at mitigating climate change and understanding the role forests play in the global carbon cycle. Disturbances have highly diverse impacts on forest carbon dynamics, making them a challenge to quantify and report. Time since disturbance is a key intermediate determinant that AIDS the assessment of disturbancedriven carbon emissions and removals legacies. We propose a new methodology of quantifying time since disturbance and carbon flux across forested landscapes in the Pacific Northwest (PNW) at a fine scale (30 m) by combining remote sensing (RS)-based disturbance year, disturbance type, …