The standardization of data element in land and resources management is an important component of the standardization of information technology in the field. It's an essential method to guarantee the interconnection, intercommunication and interoperability, and achieve the information sharing. This study is a case study on Beijing Municipal Land and Resources Management, especially cadastral management and land use management. Considering of the particularity of data in land and resources management from the aspects of language, expression, area, data and application, we study and develop many rules to describe the attributes of data element based on ISO/IEC 11179 and GB/T 19488. This paper shows the specific definition and standardization of data elements' attributes in our study. The whole study can direct the other related working in land and resources management, and give the ideas to carry out the study on the standardization of data element in the other fields.

International audienceThe basic farmland within the protection areas was required to be of high-quality and connective in the general plans for land use. A new method was developed to delineate the boundaries of high-quality, concentrated and connective cultivated land. Based on mathematical morphology principles and GIS methods, the high quality of cultivated land blocks could be identified through dilation and erosion operations according to this rule that which inside distance was less than threshold d1 and the number of blocks was larger than 3. This method was validated with the farmland classification data of Miyun County and Pinggu District in Beijing City, and 91% of high-quality, concentrated and the connective cultivated land could be identified by this method, so it would provide the reference method for delineating the basic farmland areas scientifically and reasonably in the general plans for land use