Abstract
Abstract. Regional extent and spatiotemporal dynamics of Arctic permafrost disturbances remain poorly quantified. High spatial resolution commercial satellite imagery enables transformational opportunities to observe, map, and document the micro-topographic transitions occurring in Arctic polygonal tundra at multiple spatial and temporal frequencies. The entire Arctic has been imaged at 0.5 m or finer resolution by commercial satellite sensors. The imagery is still largely underutilized, and value-added Arctic science products are rare. Knowledge discovery through artificial intelligence (AI), big imagery, high performance computing (HPC) resources is just starting to be realized in Arctic science. Large-scale deployment of petabyte-scale imagery resources requires sophisticated computational approaches to automated image interpretation coupled with efficient use of HPC resources. In addition to semantic complexities, multitude factors that are inherent to sub-meter resolution satellite imagery, such as file size, dimensions, spectral channels, overlaps, spatial references, and imaging conditions challenge the direct translation of AI-based approaches from computer vision applications. Memory limitations of Graphical Processing Units necessitates the partitioning of an input satellite imagery into manageable sub-arrays, followed by parallel predictions and post-processing to reconstruct the results corresponding to input image dimensions and spatial reference. We have developed a novel high performance image analysis framework –Mapping application for Arctic Permafrost Land Environment (MAPLE) that enables the integration of operational-scale GeoAI capabilities into Arctic science applications. We have designed the MAPLE workflow to become interoperable across HPC architectures while utilizing the optimal use of computing resources.
Highlights
Big image data analysis has become essential in an array of scientific applications, such as computer vision (CV) (Kucuk et al, 2017), medical imaging (El-Baz and Suri, 2019), material science (Okunev et al, 2020), astronomy (Kremer et al, 2017)
Owing to the advancements of satellite sensor technology coupled with ever increasing spatial resolution and temporal frequency of image acquisitions ideally position Remote Sensing applications in a ‘big’ data landscape
We have developed Mapping Application for Arctic Permafrost Land Environment (MAPLE) workflow, which can be deployed in heterogeneous computing resources
Summary
Big image data analysis has become essential in an array of scientific applications, such as computer vision (CV) (Kucuk et al, 2017), medical imaging (El-Baz and Suri, 2019), material science (Okunev et al, 2020), astronomy (Kremer et al, 2017). Sheer volumes of imagery pose new challenges in storage, analysis, and visualization techniques. These requirements exceed the capabilities existing general purpose computing resources. The quest is at its peak for seamless integration of high-performance computing (HPC) resources to translate big satellite imagery into science-ready products, which enable knowledge discovery at the nexus of the human-natural system
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