Land use analysis of plateau lake watershed based on GF and multi-source data

doi:10.13474/j.cnki.11-2246.2019.0390

Abstract

Abstract: GF-1 satellite is an autonomous satellite launched to improve the self-sufficiency of high-resolution data in China. It has an important application in land use monitoring. Comparison between GF-1 satellite images and multi-source images can excavate the differences of various data sources in land use dynamic monitoring. In this paper, the Qilu lake watershed in Yunnan province is taken as the research area. The latest Sentinel-2, GF-1 and Landsat 8 remote sensing images are selected for land use classification. Based on the data of the second national land use survey, the current situation and evolution of land use are analyzed by combining field investigation and land use transfer matrix. The results show that:① The water area, construction land, cultivated land and forest land in Qilu lake watershed show the characteristics of circle distribution from the center to the outside. Compared with the results of the second national land survey, the natural landscape area of water area, arable land and forest land is reduced, while the area of construction land and other land is greatly increased under the influence of human activities, and the changes are mainly concentrated around Qilu lake, with Nagu town and Hexi town as the typical examples. ② Both Sentinel-2 satellite image and GF-1 satellite image have high spatial resolution. The results of land use change assessment derived from Sentinel-2 and GF-1 are similar and both are better than that derived from Landsat 8 satellite image. GF-1 satellite image has high application potential.

Key words: GF, multi-source data, land use change, plateau lake, Qilu lake watershed

CLC Number:

P237

LIU Bin, BAI Shaoyun, YU Peiheng, CHEN Min, PAN Jiawei, CHEN Yiyun. Land use analysis of plateau lake watershed based on GF and multi-source data[J]. Bulletin of Surveying and Mapping, 2019, 0(12): 77-82.

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