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A Research for Information System of Land Use Landscape Pattern Based

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A Research for Information System of Land Use Landscape Pattern Based Remote Sensing Science December 2014, Volume 2, Issue 4, PP.22-27 Monitoring of Land Use Information Systems Research Xinhui Xu 1a, Yanhong Xu 1b#, Xiaoqing Zhao 1c#, Xingyu Zhou 2d 1. School of Resource Environment and Earth Science, Yunnan University, Kunming city, Yunnan province, 650091, China 2. Wuhan University, Wuhan city, Hubei province, 430079, China 3. Jilin Normal University, Siping city, Jilin province, 136000, China #Email: a email: [email protected], b email: [email protected], c email: [email protected], d email:[email protected] Abstract Nowadays, with the continuous development of informatization, the use of components GIS has become a mainstream on software exploitation and application of geographic information system. By using components GIS technology, we can analyze and design the system of the object, and also can expound the architecture, the exploitation environment, and the technical process of the system and can realize the functions of the system, therefore, it can provide a scientific information management platform for the land administration department. In this study, take Simao district of Pu’er city as an example, the latest investigation data of the land use status, the topographic maps and the rivers are chosen as the source data of this program. Under the support of GIS technology, we have a specific implementation of the Spatio-temporal data of the land use. The results of this research show that information system of land use based on GIS technology can provide an advanced system for decision-making to the land administration department. Keywords: GIS; Design; Implementation INTRODUCTION Land use is a sensitive factor of the ecological system, it is a whole set of biological and technical activities for long-term or cyclical operations of land for economic and social purpose of human being. Associated with the process of rapid social and economic development, a significant amount of natural lands, such as forests and wetlands, has been developed into agricultural lands and human settlements [1]. And such rapid changes of land use and land cover have profound influences on human and natural environments. In particular, it impacts land and air resources, biodiversity, water quality, radiation budgets, carbon cycling, and so on [2-3]. Take growth and intensification of agriculture as an example, these human activities have caused deforestation, soil erosion, watershed degradation, and reduced biodiversity and agrochemical pollution [4]. In addition to the changes related to agricultural land uses, accelerated urbanization leads to an increase in impervious surface area, which boosts the transportation and accumulation of non-point pollutants via surface runoff [5]. Timely, accurately and rapidly grasping the dynamic change information is essential for promoting rational utilization, planning and scientific management of land resource [6]. Therefore, the research of land-use change of the present stage has gradually become a frontier and hot issue of the global environmental change research [7-8]. In this study, we use the GIS technology to have an analysis of the related information of land use of Pu’er City in Yunnan province under the background of geographic space, so we can have a good understanding of the land use in Pu’er City of Yunnan province. 1 THE GENERAL SITUATION OF THE RESEARCH AREA Pu’er city, with the total area of 45,000 square kilometers, is located in southern/southwestern Yunnan, on the lower reaches of the Mekong (known in Chinese as the Lancang), with the bordering prefectures being Yuxi to the - 22 - http://www.ivypub.org/RSS northeast, Honghe to the east, Xishuangbanna to the south, Lincang to the northwest, and Dali and Chuxiong. It also shares borders with Vietnam, Laos, and Burma, being the only prefecture in Yunnan to border all three countries. As with much of the province, mountainous terrain dominates its administrative area, covering 98.3%. Elevations range from 376 to 3,306 meters. Located at an altitude of above 1,300 mand within a degree south of the Tropic of Cancer, Pu'er has a warm humid subtropical climate, with muddled distinction between the seasons and daytime temperatures remaining warm year-round. Highs peak in April and May before the core of the rainy season and reach a minimum in December; however, the warmest and coolest months are June and January, respectively at 22.3 °C and 12.5 °C; the annual mean is 18.33 °C. June thru September accounts for nearly 70% of the annual rainfall of 1,500 mm (59 in) and during this time, some rainfall occurs on most days, pushing relative humidity above 80% and there is a marked reduction in sunshine. There are 2,038 hours of bright sunshine annually. There are 1 district and 9 counties under its jurisdiction (Fig.1), such as Simao district, NingEr county, MoJiang county, JingDong county, ZhenYuan county, Jiangcheng county, MengLian county, LanCang county, XiMeng county, and JingGu county. Pu’er is a country with amount of mountains, the area of which is 98.3% of the total area; its total population is 2.573 million, and among them, the population of peasants is 2.25 million which accounts for 89% of the total population. Pu’er is inhabited by 36 distinct ethnic minorities, and 14 of them are aborigines, they are mainly hani, yi, dai, lahu,wa, blang, yao nationality, and so on. The total minority population in the region numbers well over 1.52 million. Pu’er city has ever been an important post of "tea-horse road". Because of the influence of the subtropical monsoon climate, most parts this area are covered with no frost all the year round, so it becomes one of the important producing area of the famous pu’er tea, and it is also one of the largest tea-producing area of China. FIG.1 SCHEMATIC DIAGRAM OF PU’ER CITY 2 SYSTEM DESIGNS 2.1 Structure Design of the System With the development of computer science and geographic information system (GIS) technology, the components GIS has become as the focus of current research. Components GIS (ComGIS) is the technology which an object- oriented technology and components software technology are used in software development of GIS. ComGIS does not dependent on any programming language, but embedded in a common exploitation environment to exploit the GIS application system. MapObjects (MO), is a set of components which is composed of embeddable mapping and geographic information system. It includes an OLE control (OCX), and can provide 40 OLE objects. The components can be invoked in Windows exploitation environments by inserted into Visual Basic, Visual C++ and others which support industry-standard. The map interface which is suitable for users can be set up through MO in small memory space, it also can be applicable to the industry standard programming environment and it is specifically designed for program developers. - 23 - http://www.ivypub.org/RSS Arc / Info COVERAGE, ESRI Shape and other formats is supported by it, meanwhile more than 20 kinds of raster image formats and DXF, DWG formats of AutoCAD are also supported by it, moreover, it is accessible to external databases via ODBC standard. MO components have many functions such as zooming in, zooming out, roaming the layer, selecting objects via SQL description, updating and querying the properties of the selected map elements, drawing thematic maps, generating and drawing graphic elements, picking up objects through lines, boxes, regional , polygons and round, projecting data onto different coordinates and so on. These functions can help a lot on analyzing landscape pattern of land use. By using Visual Basic 6.0 as a platform, and combining with the MO components, the secondary development can be realized, and can initially realize the establishment of the system. By fully making use of the advantages of the VB6.0 and MO components, we can not only make the system easier, but also make the system more practical. 2.2 System Function Module Design The information systems of land use can manage, updating, analysis, query, and output the land use data. According to the requirement analysis of the system, the interface design of the system can adapt to the demand of management users and non-management users. If the system works well, management users and non-management users can operate within the scope of authority through a specific interface. The system can be divided into six subsystems in the design of system functional module, such as the data management subsystem, the map browsing subsystem, the map query subsystem, the layer management subsystem, the polygons area measurement and the space measurement subsystem, and the data output subsystem. 2.3 User Interfaces Design Interface design of the system is based on the user-oriented principles, and the intuitive and operability of the interface are emphasized. According to the requirement analysis of the system, system login screen can be divided into the login screen of management users and non-management users. Different users have different range of operate authority. Users can query the elements of information which they need by the way of attribute query, and also can zoom in or zoom out the viewable area according to the need of the project. 2.4 Database Design Various types of data, such as attribute data and spatial data, are needed when establishing the system. Then the steps of database design are as follows: (1) Basic data collecting. The collection and processing of the data are the basis for the establishment of the database information system of land use; the detailed degree and the accuracy of data determine the information accuracy of the database. Therefore, when selecting the data of information system, the first and foremost task is to understand the type and the characteristics of the data and the selected range of the data.
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