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Journal of Geographic Information System, 2010, 2, 120-123 doi:10.4236/jgis.2010.22018 Published Online April 2010 (http://www.SciRP.org/journal/jgis) Copyright © 2010 SciRes. JGIS Study on Provincial Land Use Database Remittance Standard Establishment Wenfeng Liao1, Shiwu Xu2 1Land Resources Information Center of Guangdong, Guangzhou, China 2Faculty of Information Engineering, China University of Geosciences, Wuhan, China E-mail: gzlwf 302@126.com Abstract In order to realize county-level land use database remittance, establish the provincial land use database and realize annual change statistics, this paper analyzed the requirements for establishing the provincial land use database remittance standards. It proposed the principle of establish the standard compile, introduced the standard establishment process, described the standard main content, and demonstrated technical reasons for standard topologic relationship, expression method for land use data time dimension, data file naming rule, land use element classification, land use database digital dictionary file composition, land use spatial objects, etc. It provides reference for the standard establishment of provincial land use database remittance. Keywords: Land Use, Database, Remittance, Standard 1. Introduction At present, China is building county-level land use data- base. The database construction for the national level should adopt software recommended by Ministry of Land and Resources. There are several database con- struction scales, 1:2000, 1:5000, 1:10000, etc. As data- base building uses various platforms and various scales, provincial land use database needs to be established to achieve county-level land use database remittance, build provincial land use database and realize annual change statistics. This database should be flexible to change in different software. The standard provincial land use da- tabase should set uniform data use feature classification code, layer division, data file naming rule, unified spatial data, attribute data and data dictionary structure, unified conversion format and metadata formats, etc [1]. 2. The Standard Establishment Principle Standard building must follow certain principles. Provin- cial land use database remittance standard establishment principle mainly includ es the following. 2.1. Standard Should Orient to Requirement and Data Result The standard orients to data classification, storage, sharing and transfer in routine land use basic data management. It sets common contents, formats and takes the require- ments and result data as the description object. This standard doesn’t involve in process data and processing method. 2.2. Standard Independence From the data standardization aspect, the standard com- pile takes data analysis as the core. It starts from man- agement requirement and doesn’t base on any current GIS software platform or application software. 2.3. Standard Sharing Standard basic characteristic is sharing, therefore in standard establishment process, the national and provin- cial norm and stipulation should be taken as the b ase. As for data expression model, Literature [2] is the reference. As for data expression, literature [1] and provincial re- lated stipulation is taken as base. 2.4. Scientific and Open Standard Classification Data classification changes with data change and the demand development. It requests standard classification has to reflect current situation and meet the requirements. W. F. LIAO ET AL.121 3. Standard Establishment Process Provincial land use database remittance standard estab- lishment generally has the following process. 3.1. Requirements Analysis Firstly, analyze the county-level land use database re- mittance requirement, and fully understand data source complexity. Secondly, fully understand the multiplicity of county land use database that involved the software and hardware platforms, that is, the smallest set can not be used as standard. While it’s difficult to achieve can not be divorced from the actual development of the standard, Thirdly, carefully investigate and analyze ex- isting data resources and systems platforms, ensure the standard has nothing to do with software and the con- nected resource are not affected. 3.2. Standard Comp i lation According to the standard guidance, set clear stand quo- tation standard and the integrant part, then divide stan- dard layer, compile the format, and compile the standard (draft). 3.3. Ask for Standard Comments and Test Ask for opinions of standard related department and sec- tors extensively, then carry out remitted test of different county-level land use database, after continuous revision, and get the final standard. 3.4. Standard Expert Argumentation Standard expert panel discussion was held and will give lots of valuable suggestions for the final revision. 3.5. Standard Publishing Standard publishing is a process for publish, receive and accept. When the Standard has established, the publish- ing department can hold a release conference, or in web- site forms. Related department should prepare to explain any related questions to th e public. 4. The Standard Main Content The main content of provincial land use database remit- tance standard includes the following aspects. 4.1. Scope It sets standard main content and applicable scope. 4.2. Quotation Standard Lists the reference and quotation norm and stipulation of national and provinc i a l related standard. 4.3. Terminology Define Standard related special terms and terminology to guide. 4.4. Land Use Database Remittance Content It contains land use features, such as landownership, par- cels, line features, and sporadic parcels. It also includes other relevant features such as, land use data processing, management and analysis which mainly include the fun- damental geographic features, the administrative region features and the raster features, etc [1]. 4.5. Land Use Database Remittance Form Vector data is remitted in standard map sheet or a county- level administrative region form. Raster data is remitted in standard map sheet form. Land use database data dic- tionary and metadata is remitted in county-level admin- istrative region form. 4.6. Land Use Database Remittance Scope All features remittance in administrative region. Other features outside the administrative region are not remit- ted. For initial data remittance, all features will be remit- ted. When remitted data changes, all the involved fea- tures need to change (including additional and unused features). 4.7. Data Features Classification, Coding and Characterization in Land Use Database Because different features have different purposes and usage methods, the land use database data features should be classified management. The larger class is classified in face method, while smaller ones use line classification method [1]. According to different feature characteristics, the land use database data feature are divided into basic geographic information, land use, raster, basic farmland, land ownership and other features [1]. 4.8. Land Use Data File Naming Rule Land use data in data use database remittance and data conversion will follow the following naming rules in describing other files, including land use standard map Copyright © 2010 SciRes. JGIS W. F. LIAO ET AL. 122 sheet data file name rule, and land use data file naming rule base d on admi n i s t r ative region [1]. 4.9. Land Use Database Structure Give detailed description for the land use database spa- tial data structure, the attribute structure, the dictionary structure and an attribute code, etc [1]. 4.10. Land Use Database Metadata Lists land use database metadata form, define a two- dimensional data table for the land use database metadata which contains, data item, data type, value field defini- tion, etc [1,3,4]. 4.11. Land Use spatial Data Conversion Format Describe data format content and grammar rule for vari- ous data conversion, such as vector data, the raster data, the metadata and the data dictionary [1,2 ]. 4.12. Appendix It includes land use terminology, spatial objects defini- tion, land use vector data transfer format sample, land use database data dictionary transfer format samples and land use database metadata samples, etc. 5. Technical Description Technical description for standard establishment of pro- vincial land use database remittance. 5.1. Topologic Relationship In standard, the description of th e topologic relationship, should not only ensure data completeness and consis- tency, it also should reflect the princip le that the standard has nothing to do with platform software. Topologic re- lationship allows a certain data capacity and requires fully expression of spatial objects. In other words, any face-shaped geometric object should ensure that the co- ordinate’s co nnectio n str ing s are clo sed . Th e bound ar y of different spatial geometric objects is overlapped in spa- tial position, which need s separate description [2]. 5.2. Land Use Data Time Dimension Representation Fully express the historical condition of land use another request for land use data expression. The specific ex- pression form is as follows, firstly, different periods land use data should be completely recorded. This method is intuitive but data is redundancy which is suitable for non-GIS platform management system. Secondly, estab- lish base year background data and record changed data in different time period. In this situation, data redun- dancy is much smaller and easier to manage. While it needs spatial analysis to completely express land use in- formation which is suitable for GIS platform. As the provincial land use database is based on the GIS platform management system, land use database remittance gen- erally adopts the second method. 5.3. Data File Naming Rule Data file in Standard only refers to remitted and trans- ferred data file. In the process of data collection, proc- essing and management, software usage, application, and management should be consistent with the naming rules. It has to establish conversion rules or procedures with standard naming rules. 5.4. Land Use Features Classification In land use data management, features classification code can use the user-defined code, provided that it has to establish correspondence rule with standard classification code system. It has automated transformation program. What’s more, the feature classification should be in ac- cord with the standard. 5.5. Land Use Database Data Dictionary File Composition Land use database data diction ary file usually consists of three parts: the first part is the file header, the second part is the data dictionary structure, and the third one is the data dictionary data. 5.6. Land Use Spatial Objects Land use vector data constitutes by the spatial geometry data and attribute data. The two are connected by spe- cific identification code. Identification codes with the same geometry data and attribute data describes the same space objects. The spatial objects in land use data gener- ally refers to its specific featu res. Space objects expr ess ed by land use spatial geometry data can be divided into zero-dimensional object, one-dimensional objects and two- dimensional objects [1,2] according to thei r geomet ry. 6. Conclusions According to the above principle, process, content and method, “Guangdong Province Land Use Database Re- Copyright © 2010 SciRes. JGIS W. F. LIAO ET AL. Copyright © 2010 SciRes. JGIS 123 mittance Standard” has been formulated and published. This system has also been successfully in Guangdong Province’s county level land use database remittance and provincial land use database construction. This system has played important role in administrative land use data management. 7. References [1] The Ministry of Land and Resources P.R.C. TD/T 1016-2007 Standard for Land Use Database, The Minis- try of Land and Resources P.R.C, Beijing, 2007. [2] General Administration of Quality Supervision, Inspec- tion and Quarantine of P.R.C, Standardization Admini- stration of the Peoples Republic of China. GB/T 17798- 2007 Geospatial Data Transfer Format, Standards Press of China, Beijing, 2007. [3] The Ministry of Land and Resources P.R.C. TD/T 1016- 2003 Core Metadata Standard for Land and Resources Information, The Ministry of Land and Resources P.R.C, Beijing, 2007. [4] State Bureau of Surveying and Mapping, CH/T 1007- 2001 Metadata for Digital Products of Fundamental Geo- graphic Information, Surveying and Mapping Press, Bei- jing, 2001. |