According to the concrete production practice, the authors introduce a way of GIS data productions at home, expound the necessity, feasibility, difficulty and method of electronic map data sorting out, and call on all circles at home to think much of the production and construction of GIS basic data.

In allusion to variation of methanol project scheme,the basic data of methanol production were re-determined and checked,calculation method concerning methanol production was discussed,the energy consume and cost for new/old schemes were contrasted and summarized.

The paper analyzed the present situation and the problems existed in the construction of informationization in China s manufacturing industries,pointed out that the poor quality of the basic data became the bottleneck of the construction of informationization in the manufacturing industries.

Based on various investigation and wide research on the current status of city geospatial fundamental data (CGFD),this paper gives the principle to set up the CGFD application mode,describes basic contents of CGFD and introduces the classification of users.

design and implementation of data management system, owning to the aim of fundamental data management.

As the refreshing scheme depends heavily on the base data change frequency, researchers have presented many corresponding algorithms and frequency estimators for it.