HJ 1171-2021 (English Version) PDF

Scope: This standard stipulates the general principles, technical processes, assessment indicator system, assessment technical methods and assessment results for ecosystem pattern assessment. This standard applies to the assessment of terrestrial ecosystem patterns across the country and in provincial, municipal and county-level administrative regions. Other geographical areas may refer to this standard for implementation. 2 Terms and Definitions Establish ecosystem classification system Remote sensing interpretation Collect ecosystem spatial distribution data Ground survey indicators Extract and calculate spatial pattern characteristics and their changing composition and their changing ecosystem type composition proportion Ecosystem type area change rate patch number average patch number Block area boundary density overall change characteristics aggregation index ecosystem pattern and change assessment results Figure 1 Overall technical process of ecosystem pattern assessment 2

HJ 1171-2021 history

2021 HJ 1171-2021 National Ecological Status Survey and Assessment Technical Specifications—Ecosystem Pattern Assessment