In other words, hundreds of points on a map doesn't correctly convey density. Point data should only be used to symbolize infrequent data. With the top map lacking a key anyone could be expected to assume every black dot on the top map is a missing person case, when in fact, it's cave locations from the bottom map.ģ) Improper Symbolization. That's why they correlate so perfectly with the location of caves in the second map.įurther commentary by u/BRENNEJM notes that "The original top map doesn’t even have the black parts on it." This certainly hints that the top map was modified with data from the bottom map. Black dots are literally just the location of caves. The missing people are represented by the large orange dots in the top map, and it only includes people that have gone missing from national parks.Įdit: I found the original source of that top map. Notice we can't see the key on the top map? In the comments of the r/MapPorn post Reddit user plural_of_nemesis identifies the original post with this comment, as well as points out some problems with the map: This wasn't the first appearance of the meme however. Reddit user michaeljoemcc cleverly comments, "Slaw and Order: Cole Cases.") (You've got to love the titles of Reddit posts. It was posted to r/MapPorn on November 15th here: Since I love true crime and cole cases- wow! where it picked up more credibility. The Mammoth Cave system in particular had caught my interest. Caves seem to play an interesting roll in some of these disappearances. The bottom is a map of America’s cave systems. The meme originally seemed to pick up credibility when on October 28th it was posted to the Reddit forum r/Missing411 here: Do these images look similar? The top is a map of Missing 411 cases.
What was the person thinking that put the two images together? However, there are still design flaws that I will cover later. Some of their methods can be inferred by the documentation on the associated website. The bottom image was seemingly produced by Texas Parks and Wildlife as a support image for the webpage here. I'll touch on why the form of this map isn't correct later in Cartographic Analysis. For this reason I am immediately suspect that this is conveying real information. I cannot comment on the methods used to produce the map since they aren't stated. The top image is titled " North America Cluster Map" and is produced by the Canam Missing Project / Missing 411.
Where did each image come from that comprised the map? What follows is a critical analysis of the maps from both a cartographer's perspective, as well as a caver's.
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