کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5754779 1621210 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Joint hierarchical models for sparsely sampled high-dimensional LiDAR and forest variables
ترجمه فارسی عنوان
مدل سلسله مراتبی مشترک برای متغیرهای لودار و متغیرهای جنگل با ابعاد کم نمونه
کلمات کلیدی
زیست توده جنگل، عدم قطعیت اندازه گیری، تجزیه و تحلیل عملکرد، کاهش ابعاد، فرآیند پیش بینی، مدل های سلسله مراتبی، زنجیره مارکوف مونت کارلو،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات کامپیوتر در علوم زمین
چکیده انگلیسی
Recent advancements in remote sensing technology, specifically Light Detection and Ranging (LiDAR) sensors, provide the data needed to quantify forest characteristics at a fine spatial resolution over large geographic domains. From an inferential standpoint, there is interest in prediction and interpolation of the often sparsely sampled and spatially misaligned LiDAR signals and forest variables. We propose a fully process-based Bayesian hierarchical model for above ground biomass (AGB) and LiDAR signals. The process-based framework offers richness in inferential capabilities, e.g., inference on the entire underlying processes instead of estimates only at pre-specified points. Key challenges we obviate include misalignment between the AGB observations and LiDAR signals and the high-dimensionality in the model emerging from LiDAR signals in conjunction with the large number of spatial locations. We offer simulation experiments to evaluate our proposed models and also apply them to a challenging dataset comprising LiDAR and spatially coinciding forest inventory variables collected on the Penobscot Experimental Forest (PEF), Maine. Our key substantive contributions include AGB data products with associated measures of uncertainty for the PEF and, more broadly, a methodology that should find use in a variety of current and upcoming forest variable mapping efforts using sparsely sampled remotely sensed high-dimensional data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Remote Sensing of Environment - Volume 190, 1 March 2017, Pages 149-161
نویسندگان
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