The idea of constructing single detailed spatial database (SDSDB) based on extensible object\|relational database system is presented in this paper,as well as the system architecture and the implementation of prototype.

Analysis on multi-scale spatial data index structure;

Research summary of spatial data multi-scale;

Analysis on data precision and influential factors of experiments at high incidence;

The techniques of measuring data quality includes: evaluating data precision, establishing inter-rater reliability,aggregating statistics and statistical process control charts, cross checking between referential data, checking the format of lab reports, checking among relevant documents and data, comparing bet.

The Southwell zonal wavefront reconstruction model was applied to some terms of Zernike polynomials by numeric simulation, and the error caused by data precision of wavefront reconstruction matrix is studied.