The Spatial-Temporal Measurement on the Land Urbanization Level Using DMSP/OLS Nighttime Light Data——A Case Study of Bohai Rim
提出用DMSP/OLS夜间灯光数据测度土地城镇化水平的方法，并测算了1992-2010年环渤海地区的土地城镇化水平，发现其快速增长且区域差异显著，为城镇化研究提供参考。
Based on remote sensing and GIS technology, a method for measuring the land urbanization level using DMSP/OLS nighttime light data was proposed, and then the land urbanization level in Bohai Rim from 1992 to 2010 was measured. The conclusions are as follows.(1) The urban land in Bohai Rim from 1992 to 2010 was extracted from DMSP/OLS nighttime light data with an average overall accuracy of 88.11% and an average Kappa of 0.61. It can well reflect the real status of regional urban land change with a certain level of reliability.(2) In general, the land urbanization level in Bohai Rim increased rapidly from 0.82% in 1992 to 3.20% in 2010, with an average annual growth rate of 7.80%.(3) The regional differences of land urbanization levels among urban agglomerations, cities with different distances to the coastline, between coastal cities and other cities, were significant and exhibited a growing trend from 1992 to 2010.(4)The regions with high level of land urbanization show a spatial character of locating close to the coast. This research can contribute to quick and effective measurement of regional land urbanization level, and provide decision-making reference for the optimization of regional urban patterns and the construction of the new-type urbanization.