湖南通道"百里侗文化旅游长廊"开发研究   总被引：1，自引：1，他引：1  

杨洪  黄静  李树棋  刘艳 《热带地理》2007,27(5):466-471

侗文化是中华民族文化中的一块瑰宝,通道侗族自治县是中国侗文化的典型代表。通道县侗族民居、侗族建筑、侗族民风民俗种类丰富,特色鲜明,保存完整,为通道县发展旅游经济提供了重要的资源基础。文中客观分析了湖南通道"百里侗文化旅游长廊"开发的竞争优势和不利条件,从空间结构、开发定位、开发方向、开发重点、区域合作、侗文化保护等方面,提出了湖南通道"百里侗文化旅游长廊"开发思路。  相似文献   

关于建设省级地理空间数据交换中心的思考     

王良清 《现代测绘》2006,29(6):39-41

省级地理空间数据交换中心是国家空间信息基础设施建设的核心内容之一。本文针对现阶段在我国建设省级地理空间数据交换中心的问题，分析了其基本建设内容，提出了需解决和应用的关键技术。  相似文献   

中国兴农网用户认证模块设计     

白俊 《气象科技》2006,34(Z1):78-81

中国兴农网自市场信息模块设立以来,吸引了越来越多的用户发布和浏览信息,而对这些信息及发布人行为的管理渐渐纳入日程。该文介绍了为中国兴农网信息发布系统提供的一个安全的用户认证系统,在实际操作中,PHP语言与Oracle数据库的结合使用较好地实现了这一目标,有效地实现了用户的管理,包括注册、修改、授权、删除等功能,并且通过用户的认证,安全地控制了农网市场信息的发布流程。该文从设计思路出发,探讨了功能设计、程序设计语言、数据库的选择与实现等几个具体的问题。  相似文献   

National and transnational borderlanders’ attitudes towards the security fence between Israel and the Palestinian Authority     

Alon Gelbman  Ofra Keinan 《GeoJournal》2007,68(4):279-291

The subject of the security fence between Israel and the Palestinians in the West Bank has become a major issue in Israel and in the world in the last several years. The main aim of this research is to reveal the attitudes and thoughts about the fence held by local residents living in settlements (borderlanders) in the proximity of a part of the security fence that has already been completed. The research concentrates on the western-Israeli side of the fence, as it aspires to delve into and understand the meaning and implications of the security fence on matters such as personal security, safety of property and freedom of movement, the possibility of maintaining social and economic ties between the two sides and feelings about living in the area in the future. Underlying this research is the transformation occurring in the border area as a result of its closure by construction of the security fence, after many years in which it was open partially. This process has many diverse consequences, some of them contradictory, on the two populations residing near the border in Israel: the majority Jewish population (the national borderlanders), and the minority Arab population (the transnational borderlanders).  相似文献   

Assessing spatial and attribute errors in large national datasets for population distribution models: a case study of Philadelphia county schools     

Lauren Patterson  Marie Urban  Aaron Myers  Budhendra Bhaduri  Eddie Bright  Phillip Coleman 《GeoJournal》2007,69(1-2):93-102

Geospatial technologies and digital data have developed and disseminated rapidly in conjunction with increasing computing efficiency and Internet availability. The ability to store and transmit large datasets has encouraged the development of national infrastructure datasets in geospatial formats. National datasets are used by numerous agencies for analysis and modeling purposes because these datasets are standardized and considered to be of acceptable accuracy for national scale applications. At Oak Ridge National Laboratory a population model has been developed that incorporates national schools data as one of the model inputs. This paper evaluates spatial and attribute inaccuracies present within two national school datasets, Tele Atlas North America and National Center of Education Statistics (NCES). Schools are an important component of the population model, because they are spatially dense clusters of vulnerable populations. It is therefore essential to validate the quality of school input data. Schools were also chosen since a validated schools dataset was produced in geospatial format for Philadelphia County; thereby enabling a comparison between a local dataset and the national datasets. Analyses found the national datasets are not standardized and incomplete, containing 76 to 90 percent of existing schools. The temporal accuracy of updating annual enrollment values resulted in 89 percent inaccuracy for 2003. Spatial rectification was required for 87 percent of NCES points, of which 58 percent of the errors were attributed to the geocoding process. Lastly, it was found that by combining the two national datasets, the resultant dataset provided a more useful and accurate solution.  相似文献   

Blessed with Tourists: The Borderlands of Religion and Tourism in San Antonio by Thomas S. Bremer     

Daniel H. Olsen 《The Professional geographer》2006,58(4):503-504

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北京房山世界地质公园岩溶景观特色     

吕金波 《城市地质》2007,2(3):26-30

北京房山世界地质公园是以岩溶洞穴景观和峰丛地貌景观为主题的地质公园。大石河流域发育中奥陶统马家沟组石灰岩,自上而下,依次发育鸡毛洞、银狐洞、石花洞和孔水洞,由一条地下暗河将其连为一个洞系,其水源补给点在大石河上游,排泄点为孔水洞。周口店猿人遗址属于中奥陶统马家沟组岩溶洞穴。拒马河流域发育中元古界雾速山组白云岩,岩溶洞穴包括云水洞、仙栖洞、龙仙宫和三清洞,均属唐县期夷平面时期的产物。拒马河流域地层平缓的中元古界雾速山组峰丛地貌区东从张坊起,西至大沙地,南临笔架山,北抵石人峰,流域面积395km~2,其中碳酸盐岩岩石面积占360km~2,山体上部的岩石被溶解,形成峰丛地貌景观。  相似文献   

佛坪自然保护区植物群落物种多样性与海拔梯度的关系   总被引：35，自引：4，他引：31  

岳明  张林静  党高弟  辜天琪 《地理科学》2002,22(3):349-354

用多元统计分析方法研究了佛坪自然保护区植物群落多种性及群落各生长型多样性特征沿海拔梯度的变化。结果表明：1）植物群落的Shannon指数与Simpson指数及物种丰富度与海拔梯度均呈显著负相关关系;2）乔木层的物种多样性沿海拔梯度的变化则体现了“中国高度膨胀”的规律,即中等海拔高度上多样性高而低海拔和高海拔多样性较低;3）灌木层丰富度指数在1600-1700m之间有个很不明显的峰值,而其它4个指标沿海拔呈单调的下降趋势;4）草本层植物多样性呈先降后升的趋势,在中等海拔高度较低。  相似文献   

The water level simulation for crane habitat optimization in Xianghai Nature Reserve     

ZHANG Yanhong  DENG Wei  LIU Zhaoli  ZHANG Shuwen  ZHAI Jinliang 《地理学报》2003,13(2):187-194

The probability of crane living in reedy wetlands can reach 100%, at the same time, the area of reed, the water level and adjacent water area are main factors which control the crane's habitat selection. We all know that all these factors are spatially heterogeneous. For the Xianghai wetland safety and to protect the Xianghai wetland habitat of crane, this paper has mainly identified a solution to these problems. The wetland information is extracted from the TM images, which reflect the whole wetland landscape and are very important for both quantitative analysis of remote sensing observation of the earth system and positioning analysis in GIS database that is automatically extracted from DEM. The DEM for Xianghai characteristics of topography is created. On the basis of the GRID SUBMODULE, applying the GIS spatial overlay analysis, the relationship between the water level and the reed area below the water level and the rating distribution maps of reed area above water level is established. When the water level reaches the altitude of 165 m, the reed area, 981.2 ha is maximum, i.e., the water level of 165 m is the optimal.  相似文献   

国道219线新-藏公路改建工程地质灾害评价   总被引：1，自引：0，他引：1  

李铁锋  刘长兵  李欣 《中国地质灾害与防治学报》2003,14(4):26-29

国道219线新-藏区界至红土达坂路段全长109．55km。大部分路段穿越湖盆槽谷中央部位，部分线路沿湖盆边缘台地布设，海拔高度介于5000-5400m之间，地势平坦开阔，多年冻土发育，工程地质条件较差；现有公路路基高度低，几乎没有排水设施。冬季易产生路基冻胀和涎流冰危害，春、夏季因冻土融化，常引起路基沉陷和翻浆，严重危害公路运输安全甚至阻断交通。公路工程修建活动将极大地改变冻土环境，使天然状态下的水分循环发生改变，导致多年冻土退化，上限加深，进一步诱发冻胀、融沉、热融滑塌等冻土灾害，加剧风沙灾害、诱发公路边坡失稳破坏。在即将进行的公路改、扩建工程中，应采取保护冻土的设计原则，优选线路，加强侧向排水，合理设置取弃土场。  相似文献