A brief introduction to the standardized spectral database of typical ground objects

The construction of standardized spectral database for typical objects of land surface aims to push development and application of quantitative remote sensing. The database is composed of four main parts including spectral database, model database, prior knowledgebase, and image database. The spectral database contains collection of existed spectral data, with quality evaluation, and collection of new spectral data together with corresponding parameters based on the new standard and criterion. The image database mainly contains a set of typical image data, which are synchronous to the ground spectral measurements obtained by different sensors. The prior knowledgebase widely includes such as data of LULC in different scales, DEM data, phenology data etc. The model database mainly contains models for spectral simulation, and includes also some general models for processing images. The model database is a key part of the spectral database. Though model simulation, database can provide characteristic spectral curves in different phases, scales and states. Furthermore, this database also includes demonstration of typical applications, which can make user to master application method of database quickly and exploit the application field of spectral database according to the detailed requirements. The construction of spectral database mainly provide some functions according to different users as follows: user management, upload and download of spectral data, management and transfer of prior knowledge, query of spectral data and corresponding parameters, model computing, query of remote sensing image, application demonstration, system management, user communication and so on. The core product of database is to provide measured and simulated spectral data of typical ground objects