ZHANG, Ruda December 10, 2018:  More on Google Maps API; Add newline before list [03f47c7]
ZHANG, Ruda December 02, 2018:  More on SVD, graph mining, Monte Carlo in econometrics, commercial satellite imagery; text formatting/reflow. [20eea16]
ZHANG, Ruda July 10, 2018:  Add manifold learning [ba3d5e6]
Ruda Zhang September 11, 2017:  Add hierarchy of spatial predicates [03e731d]
Ruda Zhang January 04, 2017:  Geoprocessing standard concepts [e07a78f]
Ruda Zhang September 25, 2016:  Adjust image width. [4bb0324]
Ruda Zhang September 25, 2016:  PCA is SVD; PROJ.4, JOSM, and geoprocessing [bc3a8ef]
Ruda Zhang August 07, 2016:  Replace tab with two spaces. [adaa87b]
Ruda Zhang June 26, 2016:  add category tag to wiki pages [a9b356c]
Ruda Zhang June 26, 2016:  use canonical filename and no internal H1 [eeca8ff]
Ruda Zhang June 26, 2016:  flatten repo structure with manual /category indexing [6dbf2d2]