我国区域OpenStreetMap土地覆被信息时空分布特征

发布时间：2018-06-27 11:20

本文选题：OpenStreetMap + 土地覆被　；参考：《江苏农业科学》2017年18期

【摘要】：以我国区域为研究对象,分析了OpenStreetMap土地覆被信息的时空特征。结果表明,该数据在我国东北、华北、西北、华中、东南和西南6个地理分区均呈聚集状态分布,且数量表现出明显的差异性,东南区域是土地覆被信息最为集中的区域,该区域仅占研究区域总面积的5%,却集中了土地覆被信息总量的33%;土地覆被信息以人工地表和水体为主,二者之和约占土地覆被信息总量的80%,其次为林地、草地、耕地,裸地数量最小;随着空间分辨率从30 m升尺度至500 m,各种类别的样本数据均随之减少,但林地、草地及耕地的减少速度明显低于人工地表和水体;年际及月季尺度分析表明,除裸地外,其余5种土地覆被类别均呈现较为显著的增加趋势,这说明Open Street Map数据具有稳定的数据来源,具有较好的现势性,可以形成一定的时间序列。该研究为未来大尺度土地覆被遥感产品生产及验证过程中训练、参考数据的选择,特别是人工地表和水体,提供了一定参考,也为土地覆被遥感产品更新完善提供了有效的数据来源。
[Abstract]:The spatial and temporal characteristics of land cover information in OpenStreetMap are analyzed in this paper. The results show that the data are distributed in the six geographical regions of northeast, north, northwest, central, southeast and southwest of China, and the quantity of the data shows obvious difference. The southeast region is the area with the most concentrated land cover information. This area only accounts for 5% of the total area of the study area, but it concentrates on 33% of the total amount of land cover information, and the land cover information mainly consists of artificial surface and water body, and the sum of them accounts for about 80% of the total amount of land cover information, followed by woodland, grassland and cultivated land. With the spatial resolution from 30 m to 500 m, the sample data of all kinds decreased, but the reduction rate of woodland, grassland and cultivated land was obviously lower than that of artificial surface and water, and the analysis of interannual and rose scale showed that the number of bare land was lower than that of artificial surface and water. With the exception of bare land, the other five land cover categories showed a relatively significant increasing trend, which indicated that Open Street Map data had a stable data source, had a good present situation and could form a certain time series. This study provides a reference for the training and selection of reference data, especially artificial surface and water body, in the production and verification of large-scale land cover remote sensing products in the future. It also provides an effective data source for land cover remote sensing products.
【作者单位】：河北工程大学地球科学与工程学院;河北省煤炭资源综合开发与利用协同创新中心;河北工程大学矿业与测绘工程学院;
【基金】：河北省自然科学基金(编号:D2013402014) 河北省高等学校科学技术研究重点项目(编号:ZD2017212)
【分类号】：P237

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