COTQ省级土地覆盖产品的系统评估：结构一致性、光谱可分性及与ESA、ESRI和Google产品的相对定位
A Systematic Evaluation of the COTQ Provincial Land Cover Product: Structural Consistency, Spectral Separability, and Relative Positioning Against ESA, ESRI, and Google Products
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中文总结 AI 辅助
本研究系统评估魁北克省COTQ土地覆盖产品，通过与三个全球数据集对比，发现其与ESA WorldCover最相似，并揭示了类别定义导致的系统性差异，为运营监测提供参考。
中文摘要 AI 辅助
基于Sentinel-2影像生成的高分辨率土地利用和土地覆盖（LULC）产品被广泛用于环境监测和土地管理，但其性能在具有复杂生态梯度和异质地表条件的地区可能存在差异。在魁北克省，这些局限性促使开发了一个省级10米土地覆盖产品COTQ，旨在支持土地占用和土壤人工化的年度监测。本研究对COTQ产品与三个全球10米LULC数据集（ESA WorldCover、ESRI LandCover和Google DynamicWorld）进行了系统评估。本文并未引入新的制图方法，而是侧重于使用互补的评估方法分析COTQ的行为和一致性。所有产品在统一图例下进行协调，并使用结构指标（对象大小分布、形状复杂度、调整兰德指数和交并比）、源自Sentinel-2反射率数据的光谱可分性指标，以及对分歧区域进行有针对性的照片解译进行比较。分析覆盖了八个Sentinel-2影像块，这些影像块选自代表魁北克省主要生物气候域的区域，从温带和北方森林到北部苔原环境。结果表明，在参考全球产品中，COTQ在结构和光谱特征上与ESA WorldCover最为相似，同时揭示了与类别定义和主题优先级相关的系统性差异，特别是在城市区域、湿地以及岩石或隐花植物表面方面。这项多标准评估提供了对COTQ产品的客观表征，并阐明了其在魁北克省运营性土地监测中相对于现有全球土地覆盖数据集的定位。
英文摘要
High-resolution land use and land cover (LULC) products derived from Sentinel-2 imagery are widely used for environmental monitoring and land management, yet their performance can vary across regions with complex ecological gradients and heterogeneous surface conditions. In Quebec, these limitations motivated the development of a provincial 10-m land-cover product, the COTQ, designed to support annual monitoring of land occupation and soil artificialisation. This study presents a systematic evaluation of the COTQ product relative to three global 10-m LULC datasets: ESA WorldCover, ESRI LandCover, and Google DynamicWorld. This paper does not introduce a new mapping methodology but focuses on analysing the behaviour and consistency of the COTQ using complementary evaluation approaches. All products are harmonized under a common legend and compared using structural indicators (object-size distributions, shape complexity, Adjusted Rand Index, and Intersection over Union), spectral separability metrics derived from Sentinel-2 reflectance data, and a targeted photo-interpretation of disagreement areas. The analysis is conducted over eight Sentinel-2 tiles selected to represent the main bioclimatic domains of Québec, from temperate and boreal forests to northern tundra environments. The results show that the COTQ exhibits structural and spectral characteristics most similar to ESA WorldCover among the reference global products, while revealing systematic differences linked to class definitions and thematic priorities, particularly for urban areas, wetlands, and rocky or cryptogamic surfaces. This multi-criteria evaluation provides an objective characterization of the COTQ product and clarifies its relative positioning with respect to existing global land-cover datasets for operational land monitoring in Québec.
发表机构
- Université de Sherbrooke（舍布鲁克大学）
机构由 AI 辅助整理，请以论文原文为准。
