The Development of comprehensive evaluation indicators of street greenery and the identification of priority greening Areas: Providing more accurate greening planning

Abstract

Appropriate greening planning is crucial for improving urban quality of life and well-being. However, current greening assessment methods often focus on a single perspective, limiting the ability to integrate overhead top-down and street-level views for refined street-view planning. This study introduces the Street Greenery Comprehensive Evaluation Indicator (SGCEI) by combing street view imagery (SVI) with remote sensing data. Coupled with street accessibility at two scales, SGCEI helps identify priority greenery areas for urban planning. Taking Beijing’s Sixth Ring Road as a study area, the results show that: (1) SGCEI improves the Green View Index (GVI) by reducing occlusion effects, providing a more accurate assessment of street greenery. (2) Street accessibility, at both the pedestrian and vehicle scales, is highest within the inner ring roads and lower in the outer ring roads, with significant overlap in high-value areas. (3) SGCEI identifies priority greenery areas for 25% of the samples, offering better spatial aggregation and continuity than GVI. High-priority areas are primarily located within the Fourth Ring Road, while lower priority areas outside this boundary form distinct clusters. This method more accurately reflects the true quality of street greenery and offers valuable data and theoretical support for refining urban greening plans.

Keywords

• Streets view imagery
• Street greenery comprehensive evaluation indicator
• Two-scale accessibility model
• Spatial design network analysis
• Priority green area