皇冠信用网怎么开户

GB 958-1999 1: 50,000 regional geological map legend

Issuing agency: General Administration of Quality Supervision, Inspection and Quarantine

Release time: 1999

Specification category: mandatory standards

Whether to abolish: No

new standard:

Old standard: GB958—89

Click Preview

Link: http://pan.baidu.com/s/1eRZ8h8Y

Password: d1yg

Foreword

The revision of this standard is to adapt to the development level of basic geological sciences, and to timely add or update related new concepts and techniques.

Language, unified the requirements of 1:50 thousand and other small and medium scale regional geological maps to compile and print, so as to meet the calculation of geological map

The need for machine-assisted cartography and the preparation of digital geological maps, and the revision of the national standard GB958-89.

This standard is divided into five parts, seventeen chapters, and three appendices: A. Rock pattern design principles and combination methods (standard appendix)

B. Comparison table of different rock particle size divisions (informative appendix) C. Instructions for use of various codes in the standard (informative appendix), a total of

3606 legends. Each legend is coded according to different categories and procedures. Various codes, symbols and patterns strive

Be systematic, versatile, scientific, and exclusive.

This standard shall replace GB958-89 at the same time from the effective date.

Appendix A to this standard is an appendix to the standard.

Appendices B and C of this standard are indicative appendices of the standard.

This standard is proposed and managed by the Ministry of Land and Resources of the People's Republic of China.

This standard was drafted: China Geological Survey, Ministry of Land and Resources, People's Republic of China.

The main drafters of this standard: Chen Keqiang, Qi Heji, and Li Fangsha.

This standard is entrusted to the China Geological Survey of the Ministry of Land and Resources of the People's Republic of China for interpretation.