The Application Of Spatial Database Technology In Rubber Plantation In Hainan Province

Natural rubber is very important strategic materials for development of China's economic, industrial,agricultural,defense and so on.Over 50 years efforts,China's rubber plantation industry and rubber industry have got great development.At present,our country has became one of the major natural rubber producing countries in the world,and Hainan Province was the main producing area of China's natural rubber production.The natural rubber output of Hainan province account for 60%of whole China.Rubber industry has become the dominant industry in Hainan Province.Most rubber data were usually stored in various storage and different formats.It is not convenience for the rubber resource planning and rubber industry development.How to systemic manage variety of rubber resources data managing and integrated storage was essential to effective manage the rubber resource data.Advanced GIS technology,database technology and computer software development and so on were used to research,administrate rubber data has become a development trend for scientific manage rubber industry.Study area located in Haina province,through research and explores spatial database technology, using advanced GeoDatabase data model to plan and manage the information of the rubber plantation.Include Four Administrative-levels of the spatial database(Hainan province,city and county,township and town(farm)).The objective is to make comprehensive use of GIS and computer technology to establish a multi-data type,multi-scale spatial database.In order to manage rubber plantation attribute data and spatial data.The study focus on the following three aspects:designing rubber plantation spatial database of Hainan Province;construction of rubber plantation spatial database;establishment rubber plantation spatial database management system.Designing of the spatial database included designing database structure and data applications.(1) The designing of the spatial database:And designing database includes structure vertical logical database design,data horizontal organizational design and organizing various survey data of the rubber resources.Vertical logical database design was according to four administrative-levels to organize basic spatial data.Each administrative-level's data was regard as a database sub-Library and unique rubber spatial data was a database sub-Library.Spatial data scales were 1:25 million,1:5 million,1:1 million and 1:2000.The basic data include:administrative division map,topographic data,soil nutrient data,land use data and digital elevation model data.Rubber-specific data include:distribution of state-owned rubber farms,rubber plantation farm distribution,rubber and other three-dimensional renderings.Horizontal organization of the data was determined unified coordinate system and spatial reference of variety spatial data,in order to keep the Horizontal consistency of the spatial data and can be done overlay analysis in portrait.The design of database physical structure was:data in various levels and scales was consistency and integrity in Logical layer;setting all types of data storage format in Physical layer.The designing of database physical structure was:data in various levels and scales was consistency and integrity in Logical layer;setting all types of data storage format in Physical layer.Organization of the rubber survey data includes designing of the field in the database and reunification of original survey data and existing survey data.The survey data of rubber includes:the questionnaire of Rubber plantation property;the questionnaire of Rubber plantation production management,the questionnaire of Rubber plantation sampling points,the questionnaire of Rubber plantation soil properties,and the questionnaire of Rubber plantation Crop properties.(2) The construction of spatial databasesThe construction of spatial databases include collected raw data,spatial data processing,spatial data warehousing,as well as testing the database and make it work in practical in applications.Data collection and processing include original survey data amendment and organizing,raster data,digital orthophoto data were amend,tailor and convert to spatial data for coordinate system and spatial reference.(3) The establishment of rubber plantation Spatial Database Management System in Hainan ProvinceBuilding Rubber plantation Spatial Database Management System of Hainan Province was on the basis of the establishment of the Spatial Database,VB and ArcObject were secondary Development Tool to make the spatial database results were more user-friendly and intuitive,and achieves the two-way query between spatial data and attribute data.Through the database management system could plan and design the rubber resources,draw the thematic maps.The most important role was providing the gist for rubber plantation distribution and scientific management for Hainan Province.