Study on Big Database Construction and Its Application of Sample Data Collected in China's First National Geographic Conditions Census Based on Remote Sensing Images

Abstract

ABSTRACT:In the project of China's First National Geographic Conditions Census, millions of sample data have been collected all over the country for interpreting land cover based on remote sensing images, the quantity of data files reaches more than 12,000,000 and has grown in the following project of National Geographic Conditions Monitoring. By now, using database such as Oracle for storing the big data is the most effective method. However, applicable method is more significant for sample data's management and application. This paper studies a database construction method which is based on relational database with distributed file system. The vector data and file data are saved in different physical location. The key issues and solution method are discussed. Based on this, it studies the application method of sample data and analyzes some kinds of using cases, which could lay the foundation for sample data's application. Particularly, sample data locating in Shaanxi province are selected for verifying the method. At the same time, it takes 10 first-level classes which defined in the land cover classification system for example, and analyzes the spatial distribution and density characteristics of all kinds of sample data. The results verify that the method of database construction which is based on relational database with distributed file system is very useful and applicative for sample data's searching, analyzing and promoted application. Furthermore, sample data collected in the project of China's First National Geographic Conditions Census could be useful in the earth observation and land cover's quality assessment.

English Mixed Teaching Database Based on Big Data Technology

“…The goal of English translation database construction is to enable students to fully understand the process, skills and principles of translation in the data, and to master the learning and training methods of translation. The construction of the English translation database should comply with the needs of students, combine the teaching objectives with the construction objectives of the case database, provide students with a large number of translation training opportunities, strengthen the students' skill level, and improve the translation's language organization and analysis capabilities [13].…”

“…Density analysis can find important words in a large amount of data information. Density analysis is the number of single words or word blocks in statistical articles or English materials, and the number is compared with the vocabulary of the whole study factor [13]. Density analysis function can be implemented based on accurate search and regular search.…”