Abstract: A set of technical process to extract wetland information from the first national geographical conditions census result is studied and formulated, including data integration, information extraction, thematic map making, etc., which uses the multi-attribute index analysis method. Experiment results show that the method is better than the forestry department. It is more accurate and detailed, and the classification accuracy is more than 93%. This research promotes the transformation of geographical conditions census result and the integration with forestry business data, and also provides a new method and reference for wetland resources investigation.

Key words: geographical conditions census, wetland extraction, indicators analysis, results application