佛山市GPS控制网的数据处理与分析

总结佛山市GPS控制网的数据处理方法，分析该网的精度，可供较大区域GPS控制网的数据处理与精度分析借鉴。     

佛山市旅游信息系统开发

基于地理信息系统和多媒体集成的旅游信息系统开发模式可以融合GIS软件和多媒体软件二者的优点，在实践应用中有巨大的推广应用价值。文中从理论上探讨了GIS库中多媒体信息的链接和表达问题，以关系数据库为核心，把多媒体文件名信息存储在信息系统属库，依靠多媒体字段实现多媒体数据与地理信息系统图形和属性的关联，实现查询的基本概念。以此思路，佛山科技学院GIS技术实验室利用VB进行GIS和多媒体二次开发，成功地完成了佛山旅游信息系统的设计和开发。     

珠江三角洲典型基塘生态系统服务价值演变

以珠江三角洲基塘发源地——佛山市为例，采用市场价格法、影子工程法等方法，对2000、2009和2017年其基塘生态系统服务价值（ESV）进行估算，分析其变化特征，并利用地理探测器探讨其影响因素。结果表明：1）2000—2017年佛山市西、北部的芦苞镇、荷城街道等少数镇（街道）基塘面积有所增加，东、南部北滘、乐从镇等地基塘面积减少明显，期内基塘净减少19 244.47 hm²，主要转出地类为建设用地。2）2000、2009和2017年佛山市基塘ESV先降后增，3个年份中调节类功能占总价值比例均高于86%，为核心功能；各单项功能中旅游休闲价值增加最多，调节气候价值下降明显。3）佛山市基塘ESV空间变化呈西、北增而东、南降的特征，除塘鱼生产和旅游休闲功能外，其余单项功能的价值变化均呈现西南和北部增加明显的特征。4）第一产业生产总值变化量是影响佛山市基塘ESV时空变化的首要因素，其次是GDP、人口密度变化量等。建议采取控制开发规模、恢复绿色植被、加强生态监测和基塘整治、发挥基塘景观优势等措施来提高基塘ESV。     

基于WebGIS的佛山市“三旧”改造管理信息系统研究和实践

"三旧"改造已成为佛山市未来可持续发展战略的重要组成部分,随着"三旧"改造工作的不断深入,也暴露出在项目管理方面的问题。本文结合佛山市"三旧"改造的实际情况,结合虚拟现实(VR)、面向服务架构(SOA)、GIS等关键技术,研究开发了基于WebGIS的佛山市"三旧"改造管理信息系统,并进行实践探索。     

STUDY ON FUNCTION OF COMPONENTS OF DYNAMIC SYSTEM OF TOURISM DEVELOPMENT IN DEVELOPED REGION —A Case Study of Foshan in Guangdong Province

In the forming of the Dynamic System of Tourism Development(DSTD)in developed regions from the view of supply side,the Dhlphi Method and the Analytical Hierarchy Process (AHP) are used to count the weight of each component of the DSTD.It has been found that the attraction subsystem is the most important one of the three subsystems at the first hierarchical level of DSTD,which means that tourist attractions are always the principal factors for regional tourism development,even in developed regions.But it is also noteworthy that the significance of the attraction subsystem is not dominant in the DSTD.At the second hierarchical level,the physical attraction subsystem rand No.1,while the weight of the non-physical attraction subsystem is just a little larger than the weight of the hardware subsystem and that of software subsystem.And the weights of the three components in the medium subsystem are similar.The top 3 factors at the third hierarchical level are scenic spot,location and regional economic impact.The result verifies the conclusions of qualitative analysis,which depends on the market research and the study of historical date,that the most important compo-nent of the DSTD in Foshan is the impact of the developed economy.Knowing the weight of each component of the DSTD can be helpful to make out the most useful force,furthermore to determine the future orientation for regional tourism develop-ment.     

近10年佛山市大气能见度变化特征及气象影响因子

对佛山市1999-2008年日平均能见度资料进行统计分析,结果表明:近10年佛山市能见度,除在2003和2004年略有下降外,能见度呈逐年转好的趋势.能见度存在明显的季节变化和日变化:夏季优于冬季;中午最好,早上最差.各种气象要素对能见度会造成不同程度的影响:风速的影响最大,其次是相对湿度;风速与能见度呈正相关关系,而...     

测绘应急保障服务体系建设研究——以佛山市为例

针对现有测绘应急保障体系建设中存在的问题,本文以佛山市为例,介绍测绘应急保障服务体系的建设思路。体系由基础层、技术层、管理层、应用层等四个层次构成,组成一个有机整体,该体系建立了明确的测绘应急保障机制和可操作性强的测绘应急保障预案,实现了测绘应急保障的模式化和自适应。     

Arsenic distribution and hydrochemical factors in urban groundwater,Foshan City,South China

The distribution of arsenic （As） in shallow groundwater of eastern Chancheng District in Foshan City as a function of season and water table was investigated, and the influence of hydrochemical factors on the As distribution was discussed. The groundwater samples were collected from 20 sites in dry season and 9 sites in wet season. As concentrations in 20% groundwater samples exceeded value of the WHO guideline （10 μg/L）, and the highest As concentration of 23.5 μg/L occurred in dry season. It is observed that groundwater As concentration decreased with the increase of depth of water table in dry season, and were generally higher in wet season than that in dry season, indicating that ground surface As might be one of the main sources for shallow groundwater As in study area, especially in wet season. Groundwater As concentration in study area had significantly positive correlation with the concentration of Fe, Mn, NH4, F, and COD, and was positively correlated to pH, but negatively correlated to Eh and K, indicating that reductive dissolution of Fe and Mn （oxy）hydroxides might be one of the main control mechanisms for groundwater As mobilization, while pH and F also played an important role in controlling the groundwater As mobilization in study area.     

坎坷追风路——佛山市龙卷风研究中心李兆明博士谈龙卷灾情调查

2019年7月辽宁铁岭市开原遭受龙卷风袭击,灾后及时的灾情调查对于此次龙卷的定级起到了非常重要的作用。本刊针对我国龙卷灾情调查、灾调对于灾情预警的意义、观测手段的进步等问题采访了佛山市龙卷风研究中心李兆明博士。