Data integration makes the centralized processing of business data to a new level, which not only brings the overall improvement of data processing platform and the realization of information exchange between systems, but also brings new opportunities for data analysis of tax inspection work. Attention should be paid to the security of tax data.

(a) Secure acquisition technology of systems and files to avoid any damage and interference to the original media.

(two) the safe collection technology of data and software, and the safe and lossless backup technology of storage media such as disks.

(3) Techniques for restoring and reconstructing deleted files or damaged systems.

In GIS, the content of recorder includes spatial information and non-spatial information, the former is the main body of recorder. There are two main ways to record spatial information: handwriting digitization and scanning vectorization. After the graphic data is recorded, it needs to be processed in various ways, including coordinate transformation and splicing, among which the most important thing is to establish the topological relationship. ?