Tag Archives: satellite composites

Mapping the Wobbliness of the Polar Vortex

Since we use the conventions of map making to endow solidity, or reify, even the most abstract ideas, it is interesting to examine how the ‘Polar Vortex’ has spread across the mass media as both a meme and icon of the current weather patterns of the new millennium.  Rather than map place by a matrix of fixed locations alone, maps of the Vortex offer a visualization of temperature variants that reveal an anomalous weather conditions that track the Vortex as it moves, intersecting with place, across the stratosphere into our own latitudes, tracking not only a “cold front” but, globally, the disruption of the path of the circumpolar winds, or splitting of the vortex from the north pole.  We are most likely to “see” the Vortex as an incursion into our own map, effectively dividing the country (yet again?) this summer into regions of cold and heat.  The currency of visualizations of the Vortex reveals not only a meme, but a model for encoding multi-causational weather maps.  Indeed, the mapping of the divergence from usual temperature range reveals the anomaly of a north-south weather front with the solidity of a national divide, raising deep questions of its forecast of extreme weather throughout the year more than offering something like a “poor man’s vortex.”


As the term has gained wide currency as a challenge within data visualization world for throwing weather systems into legible relief, it set a new bar for producing visualizations that are challenging to fully comprehend.  The Polar Vortex is mapped as it moves, as if on its own, across the stratosphere into our own latitudes, condensed in a range of data visualizations of stratospheric or tropospheric low-pressure fronts, in ways that map onto current quandaries of atmospheric and climactic imbalance.   The animated superimposition of weather patterns condensed in a range of data visualizations of stratospheric or tropospheric low-pressure fronts themselves map onto concerns about climate change, and conjure narratives of global atmospheric change and climactic imbalance:  the disruption of the usual harmony of the polar jet stream perhaps maps onto both notable rises in polar temperatures or torrential rains off the coast of Japan, but whether due to a spike in northern pacific offshore typhoons or openings in polar ice cover, the markedly increasing waviness of the vortex has allowed increased amounts of cooler air seep south once again, in an eery echo of last January’s mid-winter chill, that has lead weatherpersons to scramble for clarifying narratives about the return of that green blob.  (To be sure, back in January, the naysayers of climate change parsed weather maps as counter-evidence to global warming, allowing them to indulge in alternate meteorological realities, before they were batted down in two minutes by the President’s Science and Technology Advisor, Dr. John Holdren.)

Weatherman scrambling to gloss


Offering a marvelous array of vowels and pattern of assonance, with a name befitting a Marvel comics super-hero as much as a weather pattern, the Vortex is a touchstone of climate change and a great case of how we have yet to ken the global as intersecting with the local.   But we have unfortunately trended to oscillate, as it were, in our maps between national weather maps, where the Vortex made such a splash as a newsworthy low-pressure pattern, to maps of patterns in global environmental change, that might better direct attention to changing meteorological realities.

Part of the problem is adopting a point of view on the weather that we are tracking–or of viewing the Vortex as a stratospheric phenomenon around the polar regions, or charting a weather pattern forecast as occurring within our nation’s bounds.  The reprise of the spill of northern air into the upper United States returned the Vortex into national news this July has provided a basis of the latter, to judge by this new visualization that projects the cooling temperatures in the northern United States, as a deep wave in the Jet Stream brought colder air to the Northeast.  Even if the cooling air that arrived was not arctic, the pattern of its arrival to the continental US this summer has prompted some significant debate among meteorologists who have glossed the map in alternate ways, almost entirely still focussing, oddly enough, in a reprise of the mid-January news blip on the Vortex, on the unit of weather in the United States in isolation from a global context.  The anomaly of the “Vortex” has become something of shorthand for a southern swing of cold air from north of the Great Lakes, produced by a decreased disparity between polar and sub-polar continental temperatures that lower the latitude of the jet stream, according to some research that has been endorsed by the National Academy of Sciences, and increased its waviness as the Arctic warms.  The maps serve to embody the increasingly newsworthy weather in the Northeast, reaching down to the southern states as if an invading army as much as a meteorological cold front, placing the anomaly of the displacement of cold air against the screen of an iconic national map on which it has been superimposed.


The map recalls a similar dispersion of circumpolar winds from the arctic into the lower forty-eight already called the “most upsetting” data visualization of the winter of 2014.  The drift of circumpolar winds at stratospheric levels offers a compelling means to understand the arrival into the Midwestern states of cold air once more from the north during the mid-summer of 2014.  Rather than only being a meme of the media, or being coined as a manifesto a group of avant-garde modernist meteorologists who found energy in the abstraction of weather forms, the term tracks the dispersion of the circumpolar whirl usually uniformly swirling about the pole offer both a rogue arrival into our national climate and a sort of emblem of an imbalance of circumpolar stratospheric harmony by pushing down the arrival of winds from the Pacific ocean.


The benefits of shifting iconography to the global are immediately apparent if only because they reveal the divergence of the weather system from a meteorological status quo.  The cycle of wind, usually located in the mid- to upper troposphere, has apparently begun to split or splinter from it usual centers above Baffin Island and Siberia as its air warms, and moves below the arctic regions.  The displaced vortex, which migrates below the arctic circle in the stratosphere, reflects the warming of temperatures at the poles, creating currents able to funnel the figurative migration of arctic air currents to sub-arctic latitudes, even if the air in question this July might more likely be northeast Pacific more than arctic in its provenance.

Displaced Vortex-full color windsEarth.com

The local is, however, far more easily digestible for viewers of The Weather Channel, and the Vortex is shown as an intersection of the global with the regional weather map.  Collating data from divergences or temperature anomalies from a database covering local temperatures in 1981-2010, the spectrum of a “heat map” tracks currents of cold across the backdrop of the lower forty-eight in an easily digestible manner that packed so big a punch for folks trying to puzzle over the freezing over of roads, local lakes, or back yards:

Vortex in States

Once more thrown off-balance, it sends cooler air below the lower forty eight and forty-ninth parallel, making it national news as a dramatic aberration that marked the entry of intense cold.  Data visualizations provide new tools of making the meteorological concept legible in ways that gain sudden particular relevance for audiences familiar with weather maps, for whom immediately powerful associations of shifts in the measurements of regional temperatures will pop out at viewers of a forecast or weather map, forcing them to pay attention to the meteorological imbalances they portend.


Recent global maps of the Polar Vortex offer more than an icon of the transcendence of territorial boundary lines systems, by processing and portraying the Vortex as an expansion and  breaking off of cold air outside the restraints of an arctic air system.


The dramatic splitting of the arctic jet, due to atmospheric pressure anomalies, was mapped by NOAA in this data visualization of July 2014, of a splintering of the vortex, in apparent response to the warming of our poles, hastened by the diminishing snowfall and ice-cover that create new chilly islands or microclimates on the ends of a warming pole we often seen as lying so far away:

July Polar Vortex 2014

The disruption that results brings the displacement of arctic winds that most often sit anchored around the polar region.  A “weak” polar vortex, interacting with arctic ice-cover decline and reduced snow cover, was some time go modeled as resulting in a meandering arctic jet stream and occasional detachment of a polar weather systems and consequent decline or weakening of pressure gradients of the vortex, and consequent reconfiguration of the arctic jet stream:


Has something like this occurred?  The dynamic visualization of weather maps in five colors and striking contour lines provide clear tools to visualize its speed and energy, in ways that might even have helped resurrect a term that had languished in meteorological lexicons from at least 1853, when the “continued circular gale” was described as flying “more rapidly and more obliquely . . . carried upward to the regions of the atmosphere above,” as lying in the ambitions of a “great Air Map” but based on the recent 1851 NOAA mapping of “great undulatory beds of the oceans . . . for all practical purposes of navigation.”

great polar vortex

But now we have a recognizable image that can be tracked over a recognizable terrestrial map that concretizes the Vortex in ways that its winds can be understood as extending over a region of truly global expanse.

Tracked in terms of actual temperature anomalies, in the winter of 2014, when newscasters and NOAA (the same agency) mapped the migration of cold air southwards of the pole into our frontiers, far outside the usual path of the jet stream, in a disturbance of the weather systems worthy of national news last January, in a data visualization which tracked a green (or purple) blob whose forced migration of frigid air from the polar regions that disrupted weather patterns with national consequence as it migrated out of Canadian airspace.



Vortex in States

In the dramatically eye-catching graphics of television’s mass-media, as the bulge of purple and magenta of detached low-pressure systems migrate south, crossing the very same borders to which we are increasingly sensitized in our national news media, albeit at tropospheric altitudes no fence or border guards could ever patrol.  Indeed, the map suddenly suggests the increasing vulnerability of our delicate weather systems, echoed by the language with which the Polar Vortex’s “EXTREME COLD” loops invasively southward across our northern border, cutting off Pacific Air:



The apparent incursion of its jet stream into the bounds of our national airspace, as in this image of cold air migrating across the northern border, results in the proliferation of metaphors all too often violent in tone:  Climate Central may have only adopted the robust rhetoric of sportscasters when it described high pressure systems in quite athletic terms that “block the eastward progression of weather systems, like an offensive lineman protecting the quarterback from the other team,” allowing the air that circulates around the arctic to start “spreading tentacles of cold southward into Europe, Asia, and North America.”  Less dynamically interpreted and understood once cast in global terms, rising temperatures at the poles–the very sites where, we should note, global warming is occurring at a rate twice the global average–displaces the previously concentrated flow of a jet stream of cold air from its arctic abode.

Of course, few seem ready to tie this to the diminishing ice-cover of the north pole, which still seem a leap too far to be made logically. Oddly, the meteorological mechanics of the expanding split-off of polar winds is modeled as an incursion of weather patterns echo the metaphorics of a military situation map of fixed borders, a historic hold-over for national weather organizations like NOAA:  the global image of wind velocities around the pole, depicted below, is oddly absent from what is actually a global phenomenon.


But we are all too used to interpret and read weather maps with both a sense of voyeurism for our friends and relatives, but from a subjective lens.Despite the adoption of globalized images from our friends at National Geographic, who used Mass FX Media’s animation to visualize circumpolar air flows, and despite the continued live monitoring of wind-flows at “Earth,” the isolation of the nation in the maws of the vortex is so readily discussed as the “most upsetting map of the winter,” as if the migration of the pool of arctic air into the northern United States were best understood as a disturbance of national temperatures.

The similar narrative about the Vortex in national forecasts stands in contrast to the maps of rising temperatures, but create a visual modeling of a meteorological distribution that almost resembles an invasion.  Even though the distribution and speed of the Vortex in summer is usually slow, the polar air however seems to be arriving from across the border with unstoppable velocity, the below global visualization, also based on a similar distribution of deviations from average temperatures craft a similarly compelling large-scale weather pattern–albeit one occurring some 3,000 feet above the earth’s surface–in which, rather than reveal a lack of equilibrium, arctic air dips south across the forty-ninth parallel and past the Mason-Dixon line, confirming its occurrence as a shift of national consequence.


Because the “most upsetting map of the winter” tracks the pooling of arctic air into the northern United States created a disturbance of national temperatures into the Eastern United States and much of the central region of the country.

Wasn’t it once more reassuring to understand the polar regions, its topography unknown, as somehow removed from the atmospheric currents than being mapped around the world?


The wonderfully protean animated map of disequilibria in the harmony of stratospheric currents of cold polar air within the jet stream opens breaches across national boundaries, albeit at considerable elevation, and also offers a way of tugging at one atmospheric phenomenon to unpack a web of inter-related phenomena.  Unlike maps of habitation or land-surface, the map traces a low-pressure system at high altitudes far above the settled or occupied land, but intersecting with it in ways that conjure a failed ability to contain colder air over the polar regions.  (Taking the iconography of weather maps as transparent, the blogosphere has suggested the adoption of charges of circumpolar intoxication.)

The distribution of stratospheric air whose flow is charted in global map as an irregular anomaly of temperatures’ spread, is perhaps most concretely rendered by the iced-over bodies of water it left in our own upper latitudes.  The striking freezing over of the Great Lakes, covering some 88% of the lakes’ surface area by mid-February, a greater proportion of seasonal ice-cover than ever registered, and surpassing the 82% record of 1996, according to Caitlin Kennedy of NOAA, which render the striking concentration of ice in frozen lakes a concrete map of the local effects of truly polar weather.


The material manifestation of the cold on the surfaces of those five lakes–all frozen solid, to appearances, save Lake Ontario, seem as concrete a result of the consequences of climactic change one might have in a chart, by placing the ice-covered lakes in a local landscape.

What seemed the displacement of the frigid polar air to the Great Lakes became something like a confusion of the local and the global in the news media that was played out in weather maps.  Of course, the meteorological mapping of this winter’s Polar Vortex in Canadian outlets seemed more the status quo, with most of the country facing sub-zero temperatures:


The US “low temperature map” used a slightly different temperature spectrum, but preserved a more alarmist image of anomalous weather conditions even in the National Digital Forecast:

temperature spectrum us vortex

The striking visual by far was from a site located exactly on the US-Canada border, an  eye-catching a frozen Niagara Falls, that icon of liminality:


The distributions that charting the mid-July summer chill newly arrived in the Midwest and much of the East coast of the United States from Canada is less striking, even if it will bring dips of twenty to thirty degrees form the normal.  NOAA omits Canada completely from its prognostications of the arrival of the coming cold, as befits its role as a national agency, and restricts its purview to United States coastal territories, even though it would make the graphic far more credible to offer a greater coverage.  It provides something of a summertime counterpart, however, in which the probability of lower temperatures than usual seem to create a ring about the same lakes, radiating almost to the Atlantic coast:


Where is the center of this new system of cold air? With roots in Hudson Bay–where else?–the polar air will be spinning southwards at the upper levels of the atmosphere, spinning southwards toward the United States. There were past migrations of arctic air over Quebec and Maine, back in late January, 1985:


The Detroit Free Press even seized on a recent NOAA projection of a similar displacement of arctic air, that locates the center of cool air migrated toward Michigan, forming a pool of air that had descended into the central United States, as if to cast the event as something like local news, even as it suggests the rise of two weather systems:


The occurrence isn’t strictly polar, or arctic, in its origin.

But the results are the consequence of a sort of distorting decentralization of the polar cold air outbreak that hovers around the arctic circle, running around the pole and allowing or protecting cold air from drifting south, containing cold air or not it its high altitude low-pressure system.  (Of course, the west coast is poised for a dryer and hotter-than-normal week.)  The decline of snow and ice around the Pole, combined with the warming of the wobbly gulf stream, will allow the chilly polar air to spill southwards to the plain states, covering not only Canada but spilling outside the low-pressure system and over to the seaboard, in a sort of nervous breakdown of meteorological model behaviors.

The disturbances of equilibria in our weather maps makes it worthy of more than symbolic note. The increasing variability that the waviness of the outer line of the low-pressure system, or jet stream, related to the declining snow cover in the far north, in the a “warm Arctic-cold continents” pattern, where the compact containment of colder airs was broadly breached.


The lack of equilibrium in the stream of polar winds–distinct from the widening polar ozone hole–opens up more of the terrestrial surface to chilling shifts in temperature. As much as the embodying a low-pressure system, the map is a narrative of the disruption of climactic harmony, and view toward the future of weather systems world-wide.  The results of the wavy polar vortex, joined with rising world temperatures, create a map of bizarre spottiness in average world temperatures that is difficult to conceive or map, precisely because its high-altitude distribution is difficult to transfer from a spherical to a flat surface, and because its distribution unfairly privileges the tracking of cold air in ways that seem, misleadingly, to fly in the face of the maps of our overheating world.  This past January, NOAA crafted a digital globe that displayed the distortion of local temperatures distorted beyond the norm, with cold displaced from its polar resting place, resulting in a cognitively useful modeling of a disjointed jigsaw of cold and warm air, where the warmer deviations of global temperatures spick not only over western Russia and Alaska, but at the polar regions itself.

polarvortex_airtempanom_610NOAA Climate.gov

The result is a jigsaw reveals the breaching of cold air from the cap of winds that encircle the polar cap has a enough of touch of biomomorphism to echo ecofeminism; the forcing of warmer air patterns resembles a blurry sonar image of curled-up embryonic twins resting in a womb as if evoking the shape of future weather systems, offering a biomorphic visual metaphor for something like an eery augur of a future holding limited possibilities for an afterlife–and of the unknown future of our planet’s atmosphere.



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Filed under Climate Change, climatology, meteorological maps, NOAA, polar vortex, weather maps

The Loosely-Sketched World

We’re familiar with considering “art” as a way to further or accentuate the representational qualities of cartography, and treating the map as if it were a system of perception–rather than viewing each as separate but analogous representational systems.  This shifts, however, when we use art to naturalize mis-perceptions of global relations.  We are accustomed to describe the relations between cartography and art as if they were separate disciplines, rather than congruent tools, barely touching, inventing a new sort of landscape to be inhabited and seen.  The addition via photoshop of satellite photographs of the earth’s surface to the hand-drawn world projections that Michigan high school student Zack Ziebell solicited from folks he encountered on the University of Michigan’s campus create a striking global distribution:   although the data sample from which he collected is ridiculously small by statistical samples–and wouldn’t be something that any respectable sort of crowd-sourced map would consider credible or worthy of attention–Ziebell’s creative map has attracted significant world wide attention because of the compelling image that he was able to craft from it.  Indeed, our recognition of the eerily photoshopped composite reveals our familiarity with the manipulation of cartographical tools and media, as much as a restricted sense of geographic knowledge.

The artifice of a cartographical flattening the world’s surface seems totally removed from a sense of accurate representation in the on-the-fly images resulting from requests Zeibell made of a group of folks on the U of M campus to map the world’s continents as best they could, without the aid of rulers or model, and without looking at an actual printed map.  The below image of the world revealed the blurred forms of their collective conceptions of mapped space, and is oddly emptied of content and place-names.  The ghostly outlines of these imagined continents resemble a Rorschach test more than a map, although the smoky apparent ink-blots, rather than invite interpretation, record the multiple prejudices and omissions of the limited geographic horizons of participants who responded to Zeibell’s particular request.  The resulting synthesis reveals the divergences and variations between how a randomized group of individuals in Michigan mapped the contours of the inhabited world as best they could, without the benefit of consulting any sources, reveal a loose attitude to the map as a repository of data to say the least:

Collective  Sketch Map

If world maps have long been refined as composites of knowledge, whose permutations might be described as “trading zones” of knowledge from different orders of expertise, the outlines of these uncannily nebulous continents offer a record of cartographical authority in crisis.

The ghostly outlines of continents that are a composite synthesized 30 hand-drawn maps that subjects constructed from memory and on the fly–twenty-nine, to be exact, with one by its creator, the high-school student Ziebell, who created it as an art project.  The folks he stopped and invited to draw maps on a blank sheet of paper weren’t perhaps focussing on summoning their geographic knowledge, but also didn’t seem to think that the task was that relevant, evidently, to their own competencies, and are easy to take as evidence of a familiarity with the fact that maps are, in our society, more apt to be downloaded than drawn, and directions for travel given by phones, rather than described with reference to a printed maps.  For as much as leading us to blame Google Maps or geographic literacy, we can also recognize how much rarer it is to draw maps–or indeed to read them–as something other than as purely symbolic forms.

Few are accurate freehand cartographers, to be sure, and few of the respondents could claim to be skilled cartographers.  But they adopted a strikingly lax attitude to the notion of mapped space.  Although the statistical sample was not at all randomized or representative, and shows little close to a scientifically significant result, one can’t help but wonder if it reflects on an age of downloadable maps, and a time in which the drawn line has become less of a unit of geographic meaning than pixellated screen, resulting in a distinctly different period eye.  The images are pretty shocking for how they suggest blinders on the geographic horizons of map-users:  in most, Japan oddly melds to the Asiatic blur; the gulf of Mexico is bridged; Anatolia is absent; much of the Middle East is melded with Africa; the insularity of England fades; and, indeed, the South Asian sub-continent either disappears or is melded with Asia.  As each tries their hand at flattening the world’s surface to a plan, the result caricatures Americans’ knowledge about the greater world illiterate and the limits of Americans’ geographic literacy, provoking incredulous reactions of disdain from around the world, from Turkish newspapers–who lamented the absence of their country, “Bu haritada Türkiye yok!” [There is no Turkey!]–to the sanguine observation of Mexican television stations, who noted with some disdain how “India was glued to Africa and Saudi Arabia” in the final composite, while remaining silent on whether it was a plus or minus that their own country was expanded and melded into a radially reduced South American continent.

Analyzing the map is beside the point, perhaps.  But the individual items, as much as the composites, suggest a devaluation of the drawn line as a unit of meaning in maps, perhaps tied to limited familiarity with reading mapped space or low expectations for cartographical detail or clear boundary lines.  And since being placed by Ziebell on Reddit, despite the small sample on which it was based, the composite made rounds world-wide as an illustration of geographic disinformation of a country that still prides itself on being a global superpower.  For the composite almost seems, in fact, about as accurate and as formalized and symbolic as “T-in-O” mappaemondi that depicted the inhabited world in the first printed maps before the discovery of America:  whatever sense of referentiality that the world map may have enjoyed, it seems to vanish if one looks at the mapping abilities of the folks Ziebell invited to map the earth’s surface among those he encounger on the U of M campus for his personal project for a pre-college program in fine arts.  In ways that suggest a neat cartographic collaboration, Zeibell scanned and combined he twenty-nine images drawn by pen with an image of his own creation, which he took as the basis to remold a NASA LandSat image of the world’s surface, by using Photoshop to fill the contours of received wisdom to see what sort of landmass would result within “the new forms of the continents” that resulted from his questionnaire.  In contrast the the blurry Rorschachs, the redistribution of satellite photography wierdly seems to invite us to inhabit what can only be described as a newly invented and radically reconfigured land, which, for viewers now familiar with futuristic maps of global warming, suddenly gains a sense of potential plausibility–until we realize its photoshopped nature:

Collective Sketch Maps

Thankfully, this image is inventing a landscape that we can only be inhabited for a short time; once posted on Reddit, the flattened projection is not of the earth’s continents or surface, but more is compelling as a projection suddenly talismanic of the deformed geographical sensibilities of folks in the United States.  But its photoshopped topographic realism offers  a perverse echo of how the Renaissance artist Stradanus’ fantasia of Amerigo Vespucci, pendant astrolabe in hand, inviting viewers to survey the luscious woods of a new continent and its bestiary, having debarked from his wind-pushed galleon to awaken an imaginary sleeping Amerindian, as he invited readers to enter the lush landscape of a newly discovered continent.

Vespucci Views American Landscape

As an art project, the resulting map suggests the wide availability of cartographical media at our disposal as well as it also illustrates an odd flattening of cartographical significance.  While these maps were surely not drawn by world travelers, or for the end of travel, they seem to empty the map of data in striking ways:  despite the somewhat detailed coherence of the continent of Australia, elision of the Persian Gulf or disappearance of South Asia is jarring, if perhaps less striking than the disappearance of Florida and apparent reappearance of the island of California.  The new land that viewers are asked to consider in the final composite eerily redraws the shorelines of the familiar world to a futuristic landscape of receding waters, contracted continents, and inflated landmasses, all betraying a striking lack of surety–as if divorcing data from the format of a map.

The off-the-cuff nature of world-mapping as a practice indeed suggests something of an anti-Ortelian populism in Ziebell’s synthesis of what seem numerous cartographical proposals of folks, to be sure, approached without any interest in their relative reliability–indeed Zeibell’s seems the one map that rooted his collection of map-images in something approaching a sense of cartographical accuracy–especially when it is comparison to the slap-dash doodles that many invited offered when asked to execute an image of the world map as best they were able by freehand, before leaving the High School student with a pretty sketchy world map in hand:

freehand map #3

Most striking might be the limited sense of points of interest on which to tether or ground the map, or any clear sense of the map as a bearer of any information:  if there is an obligatory notation of Atlantic islands above, the map seems a formalized image free of variables, and seems without informative content of its own.  (One can almost see the expressions on the faces of the multiple cartographers, wondering why in the world Zack would be asking them to draw such a thing of limited utility or meaning.)  The almost entire absence of few indices or bearings suggests a virtual absence of data in the map as a record and little authority for the map as a document.

“It is easier to have a map that is spelt right than one that has information in it,” Mark Twain wrote in his account of his world travels in the aptly-titled Following the Equator, when he sought to explain the arrival of the Maori in New Zealand from the region of modern Polynesia.  In describing how the first Maori might have reported news of their arrival in New Zealand, he pondered the route by which he communicated the route of discovery to his people so that they might successfully return to the new land of New Zealand:  “He told where he came from, but he couldn’t spell well, so one can’t find the place on the map, because people who cold spell better than he could, spelt the resemblance all out of it when they made them map.”  There is no equatorial line in the maps that Ziebel collected, or in the map he photoshopped from satellite photographs.  In a world where mapping one’s origins in space are of less clear value, is it possible that we have begun to map the resemblance of regions from the maps we make up?

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Filed under crowd-sourced maps?, Following the Equator, geographic literacy, hand-drawn maps, NASA Landsat Images, on-the-spot cartography, photoshopped maps