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Map the travel patterns of many people to a single destination. Suggested uses:

  • professional conferences and conventions
  • family reunions
  • athletic tournaments

This framework was originally used plot the cross-country travel of 50 relatives to a family reunion. It can be readily applied to professional gatherings – as seen here with speakers attending the 2015 JSGeo conference.

MatthewSchumwinger / gist:8870864
Created Feb 7, 2014
R snippet for color histogram is used in Milwaukee building ages map
View gist:8870864
## create bins for color legend$YR_BUILT <- as.numeric($YR_BUILT)
bin1 <-$TAXKEY %in% subset(, YR_BUILT < 1897)$TAXKEY$bin[bin1] <- "< 1897"
bin2 <-$TAXKEY %in% subset(, YR_BUILT >= 1897 & YR_BUILT < 1935)$TAXKEY$bin[bin2] <- "1897-1935"
bin3 <-$TAXKEY %in% subset(, YR_BUILT >= 1935 & YR_BUILT < 1945)$TAXKEY
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