For Valentine’s Day this year, enjoy this old world map in a double cordiform map projection. Published by Antonio Lafreri, c. 1564.
Most of us using GIS today do not get to do much mapping of whales, but back in the mid 19th century the American whaling trade was big business and you needed to know where the whales were.
Check out this innovative map from 1851 showing the distribution of several different species of whales, identifying each with a combination of color and pictorial symbols. The map shows at that time that the Pacific Ocean was the primary habitat for whales. The Atlantic Ocean was not because the whale resources there had been terribly depleted. Check it out!
Found this interesting digital map of San Francisco in the David Rumsey Map Collection. It was a massive wooden model of San Francisco that has not been on display in one piece since 1942. The 158 pieces that create a 42×38 foot model of the city were digitally photographed and pieced together to create one big mosaic image. The model represented the city as it was in 1940. Check it out!
Many of us that create GIS data and share with others have no idea of the unintended consequences that the data might produce. Using data and ignoring the scale, resolution, accuracy, and where it came from might produce very wrong results.
Click below to read this rather long story about how location data married with IP addresses is causing a horror show for a couple in South Africa, and this is not the only case.