Sky View Evaluation for Urban Open Space Control
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Solution Overview
Problem
Existing city planning methods fail to account for human spatial experience and visual comfort, leading to disordered and overcrowded open spaces due to the lack of a quantitative index for sky view evaluation and global simulation, which affects the quality of public activities in cities.
Innovation Solution
A method for optimal control of open spaces surrounding building forms based on sky view evaluation, involving vectorization of planning schemes, classification of open spaces, 360° scanning for mean elevations, and optimal adjustment of building forms to match preset sky view indexes, ensuring consistent sky view values across the region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If existing city planning schemes are implemented without sky view evaluation, then development layout can be established, but open space quality deteriorates due to lack of human-oriented spatial feeling consideration
Solution Approach 1:
The patent introduces sky view index as a quantitative parameter to evaluate and control open space quality. By calculating sky view factors and comparing them against standardized thresholds, the planning process transitions from subjective judgment to objective parameter-based control, ensuring both development efficiency and spatial quality
Solution Approach 2:
The patent replaces traditional manual spatial assessment with automated computational methods. Using 3D modeling and sky view factor calculations, the system objectively evaluates open space quality without relying on subjective human perception, thereby maintaining manufacturing ease while improving evaluation precision
2Manufacturing precision
If quantitative sky view evaluation is introduced, then open space quality can be controlled, but evaluation and control complexity increases
Solution Approach 1:
The patent enables the planning system to self-evaluate and self-adjust through automated sky view factor calculations. The system automatically identifies areas failing to meet sky view standards and guides adjustments, reducing the need for complex external evaluation mechanisms while maintaining high control precision
Solution Approach 2:
The patent divides the city planning area into discrete evaluation units where sky view factors can be calculated independently. This segmentation allows complex evaluation to be broken down into manageable computational tasks, reducing overall system complexity while maintaining comprehensive quality control
3Reliability
If global simulation and evaluation are implemented, then public activity comfort can be improved, but calculation and simulation time increases
Solution Approach 1:
The patent implements sky view evaluation at strategically selected observation points rather than attempting to simulate every possible viewpoint. This partial action approach captures the essential sky view characteristics needed to assess public activity comfort while avoiding the excessive computational burden of complete global simulation
Solution Approach 2:
The patent performs sky view factor calculations during the planning design phase rather than after construction. By conducting simulations preliminarily, the system can guide design adjustments before finalization, reducing the need for time-consuming post-construction modifications while ensuring public activity comfort
Data Source
AI summary
The present invention is a method for optimal control of an open space surrounding building form based on sky view evaluation. The method includes the following steps: vectorizing an existing planning scheme, and establishing a 3D model; classifying open spaces in the model, 360°-scanning for mean elevations, calculating and simulating sky views of a whole region, generating a 3D contour plot, and rasterizing the 3D isogram, such that each grid has an open space classification attribute and a sky view value; performing optimal adjustment of the building form on an open space surrounding region having a sky view value that is inconsistent with a corresponding preset sky view index within the range of the whole region, and bringing an adjusted scheme into the model for calculation again, till the sky view value is consistent with the corresponding preset sky view index.