Remember the farm in Kansas that, thanks to an error in MaxMind’s geolocation database, became the default physical location for any IP address in the United States that couldn’t be resolved? It’s happened again, this time to a couple in Pretoria, South Africa, who received online and physical threats and visits from the police because IP addresses that were from Pretoria, but whose precise location couldn’t be resolved any further, defaulted to their front yard. Kashmir Hill, who covered the Kansas incident, has the story for Gizmodo. It’s a fascinating long read that burrows into the sources of geolocation data and the problematic ways in which it’s used.
In this case the problem was traced to the National Geospatial-Intelligence Agency, which assigned the lat/long coordinates for Pretoria to this family’s front yard. The end result: one home becomes the location for one million IP addresses in Pretoria. (The NGA has since changed it.)
The problem here is twofold. First, a failure to account for accuracy radius: a city or a country is represented by a single, precise point at its centre. That’s a real problem when the data point being geotagged can’t be more specific than “Pretoria” or “United States,” because the geotagging is made artificially precise: it’s not “somewhere in Pretoria,” it’s this specific address. Second is the misuse of IP location data. It’s one thing to use a web visitor’s IP address to serve them local ads or to enforce geographical restrictions on content, quite another to use that data for official or vigilante justice. The data, Hill points out, isn’t good enough for that. [MetaFilter]
Another article on the comeback of paper maps that is really about the move of the venerable map and travel bookstore Stanfords‘s London store to new digs, this time from Nicholas Crane in the Financial Times. He maunders a bit, as do many map aficionados when we get started, and ends up becoming a paean to Stanfords’s old paper maps as much as anything else. [Gilles Palsky]
The print edition of today’s Washington Postmaps the fences and walls along the U.S.-Mexico border. The online version, which I seem to have missed when it was posted in October, offers a much more detailed look: it’s an interactive, scrollable map that offers a flyover view of the border, fenced and unfenced, as it passes through farms, ranches, towns and impossibly rugged terrain between the Pacific and the Gulf of Mexico.
BNSF is one of the largest railways in North America. It’s the end product of a series of rail mergers, and as such it has records for all its antecedent railroads. Including, as an item posted to its website this month reveals, maps, which BNSF is now in the process of digitizing.
Some of the most historically significant maps that BNSF has are maps filed by our predecessor railroads. These maps depicted the beginning of the railroad as we know it, and were often the first official survey of some of the more remote areas of the developing West.
Many of our vital maps were found in boxes or stashed in file cabinets or storage rooms. “We went to 200-plus locations going through thousands, if not tens of thousands of boxes,” said Obermiller of the conversion. “Now we are preserving the most vital maps to ensure we are retaining our vital records and are good stewards of our heritage.”
No word in the piece as to whether those records are available to researchers or the public.
Google integrates its maps into its search results: synergy! What, then, is scrappy upstart search engine DuckDuckGo, which makes a point of not tracking its users,1 to do in response? Answer: use Apple Maps. “We’re excited to announce that map and address-related searches on DuckDuckGo for mobile and desktop are now powered by Apple’s MapKit JS framework, giving you a valuable combination of mapping and privacy.”
So you would like to use a satellite image in your article and you would like to explain it to your viewers? Here is a short guide covering some of the most frequently asked questions and giving some general explanations on satellite images. It by no means covers all aspects, as there are far too many types of satellite images, but should give you a good start to find out more on your own and maybe motivate you to create your own images, which has become quite easy and quick even with no prior knowledge of it.
Complete with examples of imagery, examples of how to use it properly, and links to resources.
Temascaltepec, ca. 1579-1580. Archivo General de Indias. Ministerio de Educación, Cultura y Deporte, Gobierno de España.
Texcaltitlán, ca. 1579-1580. Archivo General de Indias. Ministerio de Educación, Cultura y Deporte, Gobierno de España.
Tuzantla, ca. 1579-1580. Archivo General de Indias. Ministerio de Educación, Cultura y Deporte, Gobierno de España.
Seven maps from late 16th-century Mexico are the focus of a 2018 study by University of Seville researcher Manuel Morato-Moreno (Cartographica article, press release). Part of a series of maps sent back to Spain by local administrators, the maps are hand-drawn, but imitate the style of printed maps: the hatching deliberately evokes woodcuts, while the animals are reminiscent of cartouches, sea monsters and other illustrative elements. But the maps also incorporate Indigenous design elements.
Although all the maps were done in the European style, they also show some characteristics that suggest the influence of indigenous cartography, like footprints on the routes and eddies in the rivers, in which fish can also be seen on the surface of the water. Having these indigenous conventions in coexistence with European cartographic characteristics suggests an effort to adapt the two cartographic styles to each other. “The authors of these maps might have unconsciously mixed European and native conventions,” the researcher adds.
In addition, the experts have identified the influence of another renaissance practice which originated in the portolan charts: drawings of figurative scenes of indigenous people and animals of the region, like deer, rabbits, vultures and armadillos. “Possibly the disproportionate representation of these animals is a way of emphasising the animal species that were characteristic of the region, or, as in the case of the armadillo, highlighting those exotic species that were unknown in Spain.”
Colby Bartlett “took a chance” on a water-stained 1841 map of Lafayette, Indiana he found at a pawn shop, where the asking price was $80. But his research into the map’s origins took a completely unexpected turn. The Lafayette Journal and Courier has the story about how Bartlett inadvertently discovered the Tippecanoe County Public Library’s missing copy of the map before the library realized it had gone missing. Believe me, you want to read this. [Tony Campbell]
A project of Cambridge’s Violence Research Centre, the London Medieval Murder Map is an interactive map that plots 142 murders from the first half of the 14th century onto one of two maps of London: a 1572 map from Braun and Hogenberg’s Civitates Orbis Terrarum or a map of London circa 1270 published by the Historic Towns Trust in 1989. The interactive map is powered by Google Maps, but the Braun and Hogenberg is not georectified, so the pushpins shift as you toggle between the base maps. [Ars Technica]