4.1 The Calculation Methods – Isovists.org

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Docs Category: 4.1 The Calculation Methods

1 Introduction

1.1 What is the Isovist_App?
1.2 What can the Isovist_App do?

2 Getting Started

2.1 First, does the Isovist_App correlate?
2.2 System requirements
2.3 Downloading and installing
2.4 Running the software for the first time

3.1 Perform Basic Functions:

3.1.1 Prepare and load a drawing for analysis
3.1.2 Optimise and troubleshoot drawing imports
3.1.3 Shrink the Isovist_App to a moveable window
3.1.4 Edit an imported drawing
3.1.5 Set the scale and analysis areas of an import
3.1.6 Change the resolution of a field analysis
3.1.7 Link areas of a drawing, such as floors
3.1.8 Increase the speed of zoom scrolling
3.1.9 Save and reopen an analysis file

3.2 Run Primary Analysis

3.2.1 Place or remove isovists within a space
3.2.2 Change the overall isovist parameters
3.2.3 View different spatial categories of isovist
3.2.4 Measure isovist values at the cursor location
3.2.5 Measure isovist values along a path
3.2.6 Measure isovist values in a field analysis

3.3 View and Export Results

3.3.1 Export point isovist data
3.3.2 View and export visual step depth data
3.3.3 Export numeric field data from all locations
3.3.4 Overlay annotations upon an isovist field
3.3.5 Export vector drawings of isovist geometries
3.3.6 Export high resolution images

3.4 Run Advanced Analysis

3.4.1 Numerically compare two or more fields
3.4.2 Find a ‘minimal set’ for a space
3.4.3 Generate a ‘spatial co-visibility’ profile
3.4.4 Generate and export an Minkowski model
3.4.5 Generate agent trails and visibility fields
3.4.6 Set start and end points for agent exploration
3.4.7 Calculate an optimal route through a field

4.1 The Calculation Methods

4.1.1 The stochastic approach
4.1.2 Isovist Geometry Calculation
4.1.2 Local Radial Scanning
4.1.3 Stochastic Isovist Overlap
4.1.4 Visibility Flooding

4.2 Isovist Measure Definitions

4.2.1 Area
4.2.2 Perimeter & Closed Perimeter
4.2.3 Compactness
4.2.4 Occlusivity
4.2.5 Vista Length
4.2.6 Average Radial
4.2.7 Drift
4.2.8 Variance
4.2.9 Skewness

4.3 Space Syntax Measure Definitions

4.3.1 Directed Visibility
4.3.3 Overt Control
4.3.5 Counterpoint
4.3.6 Choice
4.3.7 Metric Depth and Mean Metric Depth
4.3.8 Visual Depth and Mean Visual Depth
4.3.9 Integration (HH)
4.3.10 Angular Depth and Mean Angular Depth
4.3.2 Co-Visibility
4.3.4 Covert Control

5 Reference and Support

5.3 Bibliography
5.4 Notes and Acknowledgements
5.1 Crashes, bugs and other horrors
5.2 Change log

Isovists.org
User Guide
4 How the Calculations Work
4.1 The Calculation Methods

4.1 The Calculation Methods

4.1.1 The stochastic approach
4.1.2 Isovist Geometry Calculation
4.1.2 Local Radial Scanning
4.1.3 Stochastic Isovist Overlap
4.1.4 Visibility Flooding

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