地球信息科学学报 ›› 2020, Vol. 22 ›› Issue (10): 1971-1982.doi: 10.12082/dqxxkx.2020.200122
汪雪淼1,2(), 孟庆岩1,*(
), 赵少华3, 李娟1, 张琳琳1,2, 陈旭1,2
收稿日期:
2020-03-16
修回日期:
2020-07-03
出版日期:
2020-10-25
发布日期:
2020-12-25
通讯作者:
孟庆岩
E-mail:xuemiao98@163.com;mengqy@radi.ac.cn
作者简介:
汪雪淼(1998— ),女,四川成都人,硕士生,主要从事城市环境遥感研究。E-mail:基金资助:
WANG Xuemiao1,2(), MENG Qingyan1,*(
), ZHAO Shaohua3, LI Juan1, ZHANG Linlin1,2, CHEN Xu1,2
Received:
2020-03-16
Revised:
2020-07-03
Online:
2020-10-25
Published:
2020-12-25
Contact:
MENG Qingyan
E-mail:xuemiao98@163.com;mengqy@radi.ac.cn
Supported by:
摘要:
城市植被是维护城市生态系统平衡的重要组成元素,不同类型的植被具有不同的生态服务效益,然而基于植被精细分类的城市绿地景观格局度量研究较少。因此本文以北京城市副中心为研究区,使用夏、冬两季GF-2卫星遥感影像,基于随机森林特征优选和面向对象分类,划分了植被类型,并在此基础上使用景观指数法和移动窗口法分别度量了功能区尺度和栅格尺度绿地景观特征。研究结果表明:针对GF-2数据,使用多尺度分割后影像对象的光谱、纹理特征可以有效地提取植被信息;不同时相的影像能反映各类型植被的物候特征,相比于单时相数据,其分类精度更高,达到了87.7%;各功能区绿地景观格局特征差异较大,城市绿心拥有最丰富的植被且分布集中,商业区植被覆盖度和多样性均较低,绿地景观破碎;北京城市副中心景观多样性及各类型植被分布特征的空间差异显著,当前副中心绿地景观格局已形成规划的基本轮廓,但城市绿心和老城区公共绿地的建设仍有不足。研究探明了北京城市副中心绿地建设现状,证明了国产GF-2卫星在城市生态环境监测中具有较高的应用价值,有助于推动GF-2在城市生态环境领域的应用,并为副中心建设中的绿地系统监测和优化提供参考。
汪雪淼, 孟庆岩, 赵少华, 李娟, 张琳琳, 陈旭. GF-2在城市绿地分类及景观格局度量中的应用[J]. 地球信息科学学报, 2020, 22(10): 1971-1982.DOI:10.12082/dqxxkx.2020.200122
WANG Xuemiao, MENG Qingyan, ZHAO Shaohua, LI Juan, ZHANG Linlin, CHEN Xu. Urban Green Space Classification and Landscape Pattern Measurement based onGF-2 Image[J]. Journal of Geo-information Science, 2020, 22(10): 1971-1982.DOI:10.12082/dqxxkx.2020.200122
表3
2018年北京城市副中心绿地景观指数计算结果(景观水平)"
PLAND/% | PD/(个/100ha) | ED/(m/ha) | FRAC | SHDI | AI | |
---|---|---|---|---|---|---|
城市绿心 | 65.012 | 677.050 | 701.849 | 1.252 | 1.504 | 95.395 |
居住区 | 38.098 | 1612.312 | 689.839 | 1.249 | 1.415 | 93.600 |
办公区 | 37.060 | 784.271 | 668.851 | 1.250 | 1.396 | 95.096 |
商业区 | 26.907 | 1833.961 | 720.051 | 1.251 | 1.331 | 93.364 |
研究区 | 43.805 | 1008.982 | 673.226 | 1.252 | 1.485 | 94.758 |
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