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Harmonization of Geological Map Legends in Taiwan

This project focuses on consolidating the legends of area sheets in four regions of Taiwan to address inconsistencies in texture patterns and codes for stratigraphic units. The goal is to improve the accuracy and consistency of geological data for better analysis and interpretation.

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Harmonization of Geological Map Legends in Taiwan

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  1. Central Geological Survey (CGS), MOEA Geological Map Database Development and Integrated Supply System Implement Program－Geological Data Warehouse Improvement Project(2/5 ) GAIAS GIS Consultant Co., Ltd. 2009/3/5

  2. (A) Specification (or Modification) Standards of Geological Data Formats

  3. Inconsistent texture patterns codes for stratigraphic units Legends of the 48 area sheets of Taiwan geological map published by CGS since 1980’s are inconsistent To solve the problem, legends of area sheets covering each of four regions of Taiwan are consolidated. The four regions are the western Taiwan including Shueishan Mountain Range, Ridge Mountain and Igneous rocks, the southern Taiwan, the eastern Taiwan, offshore Islands Pescadores (Penghu Islands) and Tananou complex in eastern Taiwan are not included in the legend consolidation because there are no problems in inconsistent legend

  4. Problems in CGS-published Area Sheets of Taiwan Geological Map Same stratigraphic units are represented in different legends (texture patterns) Contemporary stratigraphic units are represented in different legends (texture patterns) Texture patterns of legends do not conform with lithology Formats of legends are not consistent The same stratigraphic unit has different names or codes on different area sheets Different stratigraphic units have the same codes The English name of a stratigraphic unit has different spellings

  5. Table of stratigraphic legends, the western Taiwan

  6. (B) Establishment, Management and Updating of Geological Map Data

  7. (C) Expansion of Integrated Geological Data Warehouse System

  8. (D) Supply System of Geological Data Service

  9. (E) Establishment of Physical Environment for Spatial Information

  10. (F) Promotion of National Geological Information System and Customer Service

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