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Datasets related to in-land water for limnology and remote sensing applications: distance-to-land, distance-to-water, water-body identifier and lake-centre co-ordinates.
Geoscience Data Journal ( IF 3.3 ) Pub Date : 2016-02-19 , DOI: 10.1002/gdj3.32
Laura Carrea 1 , Owen Embury 1 , Christopher J Merchant 1
Affiliation  

Datasets containing information to locate and identify water bodies have been generated from data locating static‐water‐bodies with resolution of about 300 m (1/360) recently released by the Land Cover Climate Change Initiative (LC CCI) of the European Space Agency. The LC CCI water‐bodies dataset has been obtained from multi‐temporal metrics based on time series of the backscattered intensity recorded by ASAR on Envisat between 2005 and 2010. The new derived datasets provide coherently: distance to land, distance to water, water‐body identifiers and lake‐centre locations. The water‐body identifier dataset locates the water bodies assigning the identifiers of the Global Lakes and Wetlands Database (GLWD), and lake centres are defined for in‐land waters for which GLWD IDs were determined. The new datasets therefore link recent lake/reservoir/wetlands extent to the GLWD, together with a set of coordinates which locates unambiguously the water bodies in the database. Information on distance‐to‐land for each water cell and the distance‐to‐water for each land cell has many potential applications in remote sensing, where the applicability of geophysical retrieval algorithms may be affected by the presence of water or land within a satellite field of view (image pixel). During the generation and validation of the datasets some limitations of the GLWD database and of the LC CCI water‐bodies mask have been found. Some examples of the inaccuracies/limitations are presented and discussed. Temporal change in water‐body extent is common. Future versions of the LC CCI dataset are planned to represent temporal variation, and this will permit these derived datasets to be updated.

中文翻译:

与内陆水相学和遥感应用有关的数据集:到陆地的距离,到水的距离,水体标识符和湖心坐标。

包含用于定位和识别水体的信息的数据集是通过对静态水体进行定位的数据生成的,分辨率约为300 m(1/ 360∘)。)是由欧洲航天局的土地覆盖气候变化倡议(LC CCI)最近发布的。LC CCI水体数据集是根据ASAR在2005年至2010年间通过ASAR在Envisat上记录的反向散射强度的时间序列从多时相指标获得的。新得出的数据集一致地提供了:距陆地的距离,距水的距离,水的距离身体识别符和湖泊中心位置。水体标识符数据集查找分配了全球湖泊和湿地数据库(GLWD)标识符的水体,并为确定了GLWD ID的内陆水域定义了湖泊中心。因此,新的数据集将最近的湖泊/水库/湿地范围与GLWD链接在一起,并附带了一组坐标,这些坐标明确地确定了数据库中的水体。每个水单元到陆地的距离信息以及每个陆地单元到水的距离信息在遥感中有很多潜在的应用,其中地球物理检索算法的适用性可能会受到卫星中水或陆地的存在的影响。视场(图像像素)。在生成和验证数据集的过程中,发现了GLWD数据库和LC CCI水体掩膜的某些局限性。提出和讨论了一些不准确/局限性的例子。水体范围的时间变化很普遍。LC CCI数据集的未来版本计划代表时间变化,这将允许更新这些衍生的数据集。地球物理检索算法的适用性可能会受到卫星视场(图像像素)内水或陆地的影响。在生成和验证数据集的过程中,发现了GLWD数据库和LC CCI水体掩膜的某些局限性。提出和讨论了一些不准确/局限性的例子。水体范围的时间变化很普遍。LC CCI数据集的未来版本计划代表时间变化,这将允许更新这些衍生的数据集。地球物理检索算法的适用性可能会受到卫星视场(图像像素)内水或陆地的影响。在生成和验证数据集的过程中,发现了GLWD数据库和LC CCI水体蒙版的某些限制。提出和讨论了一些不准确/局限性的例子。水体范围的时间变化很普遍。LC CCI数据集的未来版本计划代表时间变化,这将允许更新这些衍生的数据集。提出和讨论了一些不准确/局限性的例子。水体范围的时间变化很普遍。LC CCI数据集的未来版本计划代表时间变化,这将允许更新这些衍生的数据集。提出和讨论了一些不准确/局限性的例子。水体范围的时间变化很普遍。LC CCI数据集的未来版本计划代表时间变化,这将允许更新这些衍生的数据集。
更新日期:2016-02-19
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