Abstract: With the in-depth development of the second national land survey, the land authorities of all provinces and cities in China put forward new requirements for cadastral management system. Because the data types involved in this survey are very extensive, and most cadastral management systems are developed on the basis of a single platform, when the data types are not uniform, it will bring great inconvenience to management. Therefore, the development of cadastral system compatible with various data types has become a hot spot at present. Firstly, the development background of cadastral management system is introduced, and then the overall architecture, database design, system function design and technical points of the system are expounded. Keywords: geographic information system; ArcGISMapGIS cadastral management; Database Design 1 System Design Background In February 2006, the State Council issued the Notice on Carrying out the Second National Land Survey (Guo Fa No.200638), and decided to carry out the second national land survey (hereinafter referred to as the second survey) from July 2007. As an important survey of national conditions and national strength, the purpose of the second survey is to find out the current situation of land use in China, master the real basic data of land, establish and improve the system of land survey, statistics and registration, realize the socialized service of land resources information, and meet the needs of social and economic development and land resources management. Its main tasks include the following aspects: (1) rural land survey, including rural land use status survey and rural land ownership survey; (2) Urban land survey; (3) investigation of basic farmland; (4) Construction of land use databases at all levels, including the establishment of a four-level land use database and the establishment of a city and county cadastral management system. (5) Summary of results. Due to the wide coverage of this survey, the geographic information platforms used in the survey in various provinces and cities across the country are not the same, and even the same provinces and cities use different platforms because of different survey units. After the data is submitted to the superior management department, it brings great inconvenience to the management. Considering that the mainstream GIS platforms are MapGIS and ArcGIS at present, this system chooses MapGIS6.7 and ArcGIS9.2 as development platforms, and designs provincial and municipal management around the main tasks of the second survey. 2 overall architecture local management information system is a mixed structure of client/server and browser/server based on network environment. According to the characteristics and needs of different users, different development technologies are adopted to flexibly provide multi-level distributed application services. The database adopts Oracle 10G of SQL SERVER2005 or ArcGis 9.2(ArcSDE and ArcIMS), and the MapGis platform adopts MapGis6.7. The overall architecture is shown in figure 1. 3 database design 3. 1 database model This cadastral management information database is a large-scale tree-like basic spatial database, and a multi-granularity spatial data set is constructed through a multi-level classification and coding system. In the massive cadastral information database, the corresponding data can be quickly retrieved by using the administrative division index formed by the classification and coding of provincial, municipal and county granular data sets, as shown in Figure 2. Through this mechanism, the system finally realizes the integrated management of physically separated multi-sources, multi-scales and multi-projections, realizes the dynamic interaction and automatic switching of graphic data browsing, querying and statistics, realizes the logical integration of all data, and is convenient for updating and using. China Paper Download Center (1) Basic Geographic Element Data. Including administrative divisions, contours, elevation points, feature elements, notes, layers, etc. (2) Land use status data. 1: 1 10,000 land use status data, including land type maps, linear elements, sporadic elements, ownership boundaries (including village boundaries), land type boundaries, symbol notes, etc. (3) Urban cadastral data. 1:500 urban cadastral data, including boundary points, boundary lines, parcels, parcel notes and urban land use status data. (4) Rural cadastral data. Including site, site line, plot and plot notes. (5) Remote sensing image data. Through remote sensing images, large-area and comprehensive thematic information can be obtained quickly and accurately. (6) metadata. Metadata is data that describes data. In geospatial data, metadata is background information that explains the content, quality, state and other related characteristics of data. (7) Other business data. Mainly the business data involved in cadastral business management, such as land dispute management data, disaster-damaged land data and so on. , including various forms, project information, etc. 3.3 Technical Essentials of Database Design (1) Cadastral management based on massive GIS database design has a huge amount of data, covering a wide range of geographic information and has the characteristics of mass. With the construction of the database, the amount of data will increase exponentially. Moreover, the data types are complex and divided according to spatial characteristics, including spatial data and non-spatial data; According to the storage mode, including database data and file data; According to the data relationship, it includes structured data and unstructured data. How to manage and apply these massive data effectively is the key factor in the design of spatial database. For the management of massive spatial database, besides following the design principles of GIS database, it is also necessary to formulate a unified coding standard. (2) Establish a database coding system with reference to relevant national and ministerial standards, and establish a provincial and municipal cadastral information standard coding system. While integrating data from different sources and media, we should maximize the adaptability of the database to all kinds of data, flexibly define the configuration information needed for data operation on the basis of ensuring the integrity of all kinds of data information as much as possible, and incorporate the constructed basic data resources into the database for application. Form a unified standard specification and standard coding for cadastral management informatization construction, including the establishment of cadastral information standard coding system and the establishment of cadastral basic database storage specification. (3) The basic geographical framework and granularity of database management take county-level data sets as the basic storage management granularity, and reasonably store and organize them according to the principles of administrative division, map sheet and factor stratification, and use the joint table index of cities and counties to ensure the reasonable organization and effective call of data in different administrative units and formats; Spatial framing index is used to ensure that the spatial data layers of different feature layers with the same spatial range have exactly the same spatial range, thus realizing the spatial consistency of the database; The hierarchical index of features is used to ensure that the same feature layer and spatial data layers with different spatial partitions have exactly the same attribute information structure, so as to realize the consistency of spatial database attributes. 4. Spatial analysis of system function design (1): including import range analysis, arbitrary range analysis and regional buffer analysis. After the analysis is completed, the spatial analysis results and statistical results are given, and the GIS cutting analysis change function is mainly used. The analytical structure is recorded in history. (2) Statistics: according to the administrative jurisdiction and year, according to the second survey, the relevant statistical tables of land use, basic farmland and urban cadastre are marked. First of all, the basic summary data is summarized from the county-level geographic data. When publishing or submitting summary results, data is extracted from basic summary data by administrative region to generate summary results. The formats of statistical tables include EXCLE and ACESS formats, and the fields are implemented according to the secondary survey standards. The results of statistical analysis are recorded in history. (3) Print out the map: it includes drawing by administrative area and drawing by map sheet, and the legend adopts the legend specified in the second survey; You can set the halo line. The drawing results are recorded in history. (4) Data query: analyze and click the primitive attribute search function module, search the primitive according to the specified conditions, and make statistics on the queried primitive. (5) Auxiliary approval: support importing new projects, interactively creating new projects, plotting projects and tabulating project statistics; After the project is established, it will be managed by the database. (6) Business handling: mainly including cadastral registration, certification and other business handling. (7) File management: files are stored in the database of the corresponding jurisdiction according to the administrative region and year for unified management; C/S and B/S sections can browse documents, and documents can be modified and updated on the data maintenance side. (8) Data maintenance: maintaining spatial data, document data and system configuration information. (9) data conversion: provide the mutual conversion function of ArcGis's shape, coverage, Geodatabase and MipGis formats; Provides conversion between ArcGis's shape, coverage, geodatabase, MipGis format and VCT format. (10) data change: it provides interactive data change function that can be restored, and the changes are recorded in history. (1 1) Other functions: including dynamic projection, coordinate analysis, index graph browsing, user role and authority management, etc. 5 technical points 5. 1 Support the realization of ArcGIS and MapGis data formats. Because the system supports data in ArcGIS and MapGis formats, the data in these two GIS formats are stored in the database according to their own forms. The system relies on the middle module to support ArcGIS and MapGis data formats. The middle module reads the type of GIS data format from the configuration file information according to the jurisdiction and year, and realizes its operation respectively; Meanwhile, the intermediate module provides a unified reading and writing method. 5.2 WebGIS technology WebGIS has the advantages of cross-platform, good expansibility and openness, which is conducive to expanding the functions and performance of cadastral management system, facilitating users to handle business, especially the combination with e-government platform and improving the ability of the system. 5.3 Massive spatial data management technology The storage capacity of this system and various basic geographic information, land use status data, urban cadastral data, rural cadastral data, remote sensing image data and document data are all above TB level. Using massive spatial data management technology to integrate data management can truly enjoy data, which is the key to realize physical separation and logical unity of databases. 5.4 History management technology This system adopts the form of history management for most functions, and users can query, delete and restore the history, which greatly improves the usability of the system. The system allows users to choose whether to use the database to manage history, or whether independent users can manage history themselves. 6 Application Prospect This system is designed on the basis of the relevant standards of the second survey, which can be used for the construction of the provincial and municipal second survey database and the needs of cadastral management, and can support the data in ArcGIS and MapGis formats, so this system has good popularization and use value. Reference [1] Wu Xincai. Principle, method and application of geographic information system. [M], 2000. [2] Wu Xincai. Basic technology and development trend of geographic information system. Earth science. 1998,23 (4): 329 ~ 333.[3] Huang Xingyuan. 2002.[4] Qi, et al. Training materials for the second national land survey. China Agricultural Press, 2007. [5] Xu Shiwu, Zhang Fayong, Application of Liu Xiuzhen Geographic Information System in Cadastral Management System. Journal of China Geo University. Posted in China Paper Download Center.