First, the research topic of geographical science in system of geography:
1, harmless treatment of urban garbage
2. The main factors affecting the development of tourism.
3. Protection and rational development of mineral resources
4. Analysis of the advantages of county towns in rural cities.
5. Exploration of expanding the application scope of maps.
6. Study on moderate scale development of industrialization and agriculture.
7. Research on agricultural sustainable development.
8. Relying on University Town to Promote Local Economic Development
9. Environmental pollution of township enterprises
10, the evolution characteristics of natural population structure in plain areas
1 1. Study on the development of sightseeing agriculture
12, adjustment of rural industrial structure
13, Wetland Protection
14, the harm of sandstorm and its prevention and control
15, urban traffic problems
16, the role of economic globalization in promoting world economy and trade
17, the characteristics of multinational companies and their regional distribution law
18, Study on Layout Conditions of High-tech Industries
Second, the regional geography research topic of geographical science
1, Feasibility study on building an export base of regional characteristic agricultural products.
2. Thoughts on promoting the rapid development of township enterprises in Henan.
3, * * evaluation of urban water resources utilization
4.* * Rational development and utilization of urban groundwater
5. Types and prevention of geological disasters in mountainous areas of western Henan.
6. * * Evaluation of Tourism Resources
7. Investigation on the construction of * * * tourist city.
8. Problems and Countermeasures in Tourism Development
9. Explore cultural treasures and promote the rapid development of tourism.
10, * * * Shaping the image of urban tourism
1 1, Cultural Heritage Protection of Zhengzhou Ancient Capital
12, Causes and Prevention of Sand Blowing Weather in Zhengzhou
13, environmental protection in western development
14, rational development of resources in the western development.
15, the construction significance of Zhengzhou export processing zone
16, Feasibility Study on Developing Green Industry in Yellow River Beach Area
17, Study on Location Advantage and Investment Environment of Zhengzhou National High-tech Industrial Development Zone
18, the enlightenment of the revival of Appalachian coal industrial zone in the United States to the development of old industrial bases in Northeast China.
19, the enlightenment of Tokyo's regional economic redevelopment to Beijing's development
20. Background analysis of rapid economic growth in the Yangtze River Delta.
2 1, the geographical factors of the rise of the EU
22. Regional economic development in the Pearl River Delta.
23, the significance of building the Central Plains urban agglomeration
24. Development and protection of surface water resources in Zhengdong New District
Geographical science papers
Application of Network Geographic Information System in Environmental Science
Environmental science is a science that studies the environmental factors on which human beings depend and their relationships, including the relationship between human beings and the environment in understanding and transforming nature. This paper discusses the specific application technology of D's decentralized network geographic information system and AGENT's decentralized geographic information system in environmental science.
Geographic information system; Environment; Geographic information system; scatter
Geographic Information System (GIS) is a combination of computer graphics and database. It outputs geographical location and related attribute information to users in an illustrated way. Users can make various auxiliary decisions with their own visual expression. The appearance of geographic information system has changed the traditional way of information processing, making people process information from numerical field to spatial field. Geographic information system has always been closely related to information technology. With the rapid development of distributed computing technology and network technology, distributed computing technology, as a platform that can carry geospatial information, has become the most important direction of GIS development. Distributed geographic information system is a network geographic information system based on distributed spatial database, and a group of distributed servers cooperate to provide geographic information services for clients. The network information system can effectively manage the complex pollution source information in a large geographical area, and analyze in detail the changes of various factors affecting the regional environment, as well as the geographical attributes and characteristics of major pollutants.
First, the characteristics of network geographic information system
With the rapid popularization of the Internet and relying on the Internet to obtain information, the application field of geographic information system is expanding. Network software can enjoy geospatial information services through ordinary browsers, thus reducing the cost of data distribution. For example, the appearance of digital map makes people give up the traditional printed map and just look up the location and route on the Internet. The characteristics of different environmental factors in the same area at different time periods are superimposed, and the correlation between regional quality evolution and other factors is analyzed. Forecast the regional environmental quality. In addition, the location of key pollution sources and their impact on the environment can be displayed on the drawing.
Second, realize resource sharing. In order to realize the enjoyment of information, an open network for users and resources is established. It has powerful spatial analysis and data processing functions, makes full use of network functional modules and selected environmental monitoring models to process multi-source environmental information, find out the dynamic law of environmental evolution, establish a scientific monitoring model, and realize comprehensive dynamic monitoring of the environment.
3. Fast speed and high precision. By using network distribution technology, data can be correlated with maps, topological relations can be established for spatial analysis, and various thematic maps can be assisted in decision-making and management. It not only saves a lot of manpower, material resources and financial resources, but also gets the results quickly and accurately.
Transparent, location transparent, that is, users do not need to know the location of files and databases, and resources can flow freely in the system without renaming. The outside world does not need to know that the system changes the position of objects to balance resources. The system can make additional copies of files at will without the user's knowledge, and it happens in parallel without the user's feeling. Hiding the similarities and differences between data representation and calling mechanism can hide the errors and recovery events inside the object and achieve the purpose of error correction.
Second, the main performance methods of network-based geographic information system
Three-dimensional distributed network geographic information system
1. has data management function: 1 manages attribute data through relational database, stores geospatial data in semantic form, and performs spatial operation through spatial data management software package. Use indicators or keywords to establish links between geospatial data files and relational databases; 2. Improve the relational database, manage attributes and spatial data in a unified way, introduce object-oriented technology into the relational database, establish an object relational database or a pure object database, separate objects from the underlying representation, and locate spatial attributes and non-spatial attributes equally, so as to realize the integrated management of attribute data and spatial data. With the development of technology, the client can adopt new protocols, improve the new technology of geographic information system by using web technology, and display multimedia data on the browser, while the information in WebGIS can query and analyze spatial data through interactive operation. Users can browse the spatial data on the website and conduct various spatial data retrieval and spatial analysis.
2. Representation method of distributed network system: 1 plug-in. Using the network system, some simple operations need the server to complete and return the results. When the network traffic is large, it is necessary to use plug-in technology and software that can exchange information with the browser to transfer some service functions to the client, which speeds up the response speed of user operation and reduces the network traffic and server load. Moreover, the operation is simple, and ordinary users can easily obtain the required information. Using general browser to publish geographic information, usually using free plug-ins, greatly reducing the economic burden of users; 2. Cross-platform: No matter what system the client and server use and what software the server uses, users can transparently access WebGIS data, thus realizing remote heterogeneous data sharing; 3 portability: stateful spatial data transmission protocol can be realized, and through the same data transmission process, data transmission can establish contact and reduce the heavy network transmission burden. As an extension method in the program, it effectively reduces the time consumed by the program. The client also has no data management mechanism, so the execution speed is faster and the burden on the network and server is light.
Distributed Geographic Information System Based on Double Agent Technology
It is an effective tool to reflect the present situation and changes of the earth space on which human society depends in digital form, describe the characteristics of these spatial data, simulate the behavior of earth space objects in a modeling way, and support input/output, storage, display, geospatial information query and decision-making in a specific format with the support of computer software and hardware. In a word, GIS provides people with advanced tools for managing geographic information and spatial analysis. With the development of computer network, computer communication and other technologies, Agent system relaxes the restrictions of centralized control and sequential control, provides decentralized control and parallel processing, and solves the problem of cooperative work between application fields of network distributed system. Systems in different fields cooperate with each other to complete related applications, analyze the interoperability between geographic information and geographic applications, and realize mutual access and interoperability of information in heterogeneous geographic information processing environment. Effective management of resources, high-quality exchange of geographic information and services, reducing frequent interaction between servers and customers, can be used for local geographic calculation and secondary processing such as surveying and geographic modeling, as well as personalized display of data. The concrete performance of data can describe any complex content, which has obvious advantages and characteristics, including the realization of spatial data and network distribution services, efficient computing, data resource security and so on.
References:
[1] Guo, Sheng,, et al. Principles and Applications of Geographic Information System, China University of Mining and Technology Press, 2002.
[2] Chen Luhe editor geography introduction to information systems Science Press, 2000.
[3] Bian Fuling et al., Principles and Methods of Geographic Information System, Surveying and Mapping Press 1996.
[4] Wu Lun et al. Principles, Methods and Applications of Geographic Information System Science Press 200 1.
[5] Li. GIS Design and Implementation Science Press, 2003.