PySSaGE

PySSaGE is a collection of python versions of analyses originally part of the PASSaGE (Rosenberg 2001) and PASSaGE 2 (Rosenberg and Anderson 2011) software packages for spatial analysis.

See the PySSaGE wiki for more information.

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Analyses

So far the following analyses have been implemented:

Quadrat-Variance

One-dimensional

• TTLQV: Two-Term Local Quadrat Variance Analysis
• 3TLQV: Three-Term Local Quadrat Variance Analysis
• PQV: Paired Quadrat Variance Analysis
• tQV: Triplet Quadrat Variance Analysis
• 2NLV: Two-term New Local Variance Analysis
• 3NLV: Three-term New Local Variance Analysis

Two-dimensional

• 4TLQV: Four-Term Local Quadrat Variance Analysis
• 9TLQV: Nine-Term Local Quadrat Variance Analysis
• 5QV: Pentuplet Quadrat Variance

Wavelets

• Haar
• French Top Hat
• Mexican Hat
• Morlet
• Sine

Distance Calculations

• Euclidean distances/angles from 1, 2, and 3-dimensional points
• Spherical distances/angles from latitudes and longitudes
• Shortest-path/Geodesic distances
• Distances from arrays of data
  • Euclidean distances
  • Squared Euclidean distances
  • Manhattan distances
  • Canberra distances
  • Hamming distances
  • Jaccard distances
  • Cosine distances
  • Czekanowski distances
  • Correlation distances
  • Squared correlation distances
• Distance class determination

Connections/Links

• Delaunay/Voronoi Tessellation
• Minimum-spanning Tree
• Relative Neighborhood Network
• Gabriel Graph
• Least-diagonal Network
• Range-based Connections
• k-nearest Neighbors

Correlograms

• Correlograms
  • Moran's I
  • Geary's c
  • Mantel Correlograms
• Variograms

Anisotropy

• Bearing Analysis
• Bearing Correlograms
  • Moran's I, Geary's c, and Mantel
• Windrose Correlograms
  • Moran's I, Geary's c, and Mantel
• Angular Correlation Analysis

Miscellaneous

• Mantel tests