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以粤北山区某县农村土地承包经营权确权登记项目为例,设计了无人机航空摄影及后续处理技术方案,生产了现势性高强、分辨率高的正射影像,并应用到了后续权属调查中,实践表明该方法有助于降低生产成本、提高工作效率。 相似文献
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土地变更调查是国土资源管理的重要基础性工作。本文结合广东省多年来积极探索建立的适应自身需求的变更调查工作机制,开展年度变更调查实践,总结项目组织实施、技术方法等方面的经验,特别是对重点变更类别提出了具体操作办法,对今后进一步高效、精确地开展土地调查具有一定的借鉴意义。 相似文献
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In the present study, the performance of the GRAPES model in wind simulation over south China was assessed. The simulations were evaluated by using surface observations and two sounding stations in south China. The results show that the GRAPES model could provide a reliable simulation of the distribution and diurnal variation of the wind. It showed a generally overestimated southerly wind speed especially over the Pearl River Delta region and the south of Jiangxi Province as well as the coastal region over south China. GRAPES also exhibited a large number of stations with the opposite surface wind directions over the east of Guangxi and the south of Jiangxi during the nocturnal- to-morning period, as well as an overall overestimation of surface wind over the coastal regions during the afternoon. Although GRAPES could simulate the general evolutional characteristics of vertical wind profile, it underestimated wind speed above 900 hPa and overestimated wind speed below 900 hPa. Though the parameterization scheme of gravity wave drag proved to be an effective method to alleviate the systematic deviation of wind simulation, GRAPES still exhibited large errors in wind simulation, especially in the lower and upper troposphere. 相似文献
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The numerical simulation of typhoons has been found to be very sensitive to the vertical resolution of the model. During the updating of the TRAMS model from version 1.0 to 3.0, the horizontal resolution has been increased from 36 km to 9 km, while the vertical layer number only increased from 55 to 65 layers. The lack of high vertical resolution limits the performance of the TRAMS model in typhoon forecasting to a certain extent. In order to study the potential improvement of typhoon forecastin... 相似文献
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