The Development Of GIS-based Land Survey Information Management System At County Level

GIS(Geographic Information System) is one of the main digital technologies that are used for developing the ''Digital Earth" and is widely applied to numerous social fields with its powerful abilities of spatial information analysis, management and storage. The development of land management also needs the CIS technology supporting urgently in the new century.Land resources are the most important strategic resources in the country. For our country with a large population and limited land resources, the cultivated land and its reserve resources are relatively insufficient at present. The land survey information is the basis of planning, managing, protecting and utilizing land resources and the important means that examine whether or not keeping the general quantity dynamic equilibrium of cultivated land in our country. For the land information having characteristics of enormous quantity, various source and frequent change, the traditional office procedure relying on craft can't meet the need of the modern land management. It is imperative to set up scientific land use management information system of current situation.Based on the demand of land administrative department, taking Putuo district of Zhoushan as an example, using the land survey data as the data source, establishing the regional land thematic CIS as aim, the application of CIS sysytem integrated technology in this system was mainly studied in this thesis and some related function modules were developed catering to the actual need of the land administrative department. The integrated mapping application programme in C/S(client/server) developing module using the integrated technology of Visual Basic and Mapinfo was developed . The developing ofGIS-based Land Survey Information Management System in County realized the integrated management of the texts and maps of the land survey data, solved the inefficiency and inconvenient problem in the land survey management and met the demand of land survey of land administrative department. The main contents of this study are as follows: Designed system structure and system function, analysed and chose the developing method and the needing software, configured system software and hardware and designed the user interface; Designed the database structure, completed the structure design of spatial database and attribute database; Established the Land Survey Information Database: completed the process of data collecting, data import, map digital and data delamination; Established the mathematic analysis model; Developed the module of data management, map management,analysis and system management; Completed the system integration.The results are as follows: Established the Land Survey Information Database and the Land Survey Information Management System; Realized the function of import Wiapinfo interchange file(*.mif), map zoom in, map zoom out, map pan, delete, copy, drawing point, drawing line, drawing polygon, editing the pattern of map element. Realized the function of creating and displaying seven types of thematic map: ranges, bar charts, pie charts, graduated, dot density, individual and grid. Realized the function of printing map. Realized the function of land survey data and other related data importing, browsing, querying, statistic and printing report forms and querying between map and attribute. Provided the forecast model of Land requirement and Population, forecasted the change trend of land area and population growing via calculating and analyzing the data and drawing the trend figure according to the calculating results. Realized the function of system maintenance: include user management and data-IX-dictionary management.