: rendered at 18,000 X 12,000 :
So I never got around to making a map of downtown Birmingham, Alabama, but I still plan on doing so. Instead I decided to seek out a somewhat new place and try out a new style. For years I have been reticent about making a map that it not composed of an urban area. I always thought that it was the buildings and the streets that gave each map its intrinsic uniqueness, but with this map, I have branched out, tried something new, and am pleasantly surprised with the results.
Years ago I posted a topographic map of Rocky Mountain National Park featuring the first mountains I ever climbed as a child. It was also the first topographic map posted this to this blog, and to continue this line of thought, I was delighted to find that the imagery was available to create the first map of its type. Instead of the aerial photography being too dull to be worthy of a map, I found it interesting that the shadows created by the ridge line added some aerial chiaroscuro. Moreover, upon closer examination, due to the spatial resolution of the source aerial photography, you can actually make out the trails crisscrossing through the forest. While they don’t appear as well as a highway or skyscraper, the trails and shadows help make create a map that I am happy to publish here.
Another striking feature of the imagery is the color tone of the tarn at the base of Andrews Glacier. This blue/green lake adds a unique color contrast to the somewhat monotone yellow hue of the rocky terrain. I do, however, wish there was a bit more color contrast between the east side of the continental divide and the west side of the continental divide that I’ve seen when I’ve stood atop these mountains. I also kinda wish, for once, that the aerial photography wasn’t taken from nadir, rather I wish it was taken at an oblique angle because we’d be able to see more elevation contrast between the various mountain peaks. However, since I have hiked these mountains, I know the continental divide shown in this aerial photography traverses north and south and the shadows are only formed from the ridges extending west from the continental divide. This makes it slightly easier to differentiate where the ridges are, but not where the peaks are. Anyways, I’ve decided to sample a portion of this imagery and will make another iteration of this map shortly.
View the Google Map of the Front Range in Rocky Mountain National Park in Colorado. Curiously, the imagery used on Google Maps shows the area during the winter time and covered in snow.
View the rest of the map details:
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Google Maps: Add the Contour Interval to the Legend of your Terrain maps
|| 8/6/2009 || 3:56 pm || 5 Comments Rendered || ||
Nearly every printed topographic map I’ve ever looked at has the contour interval, otherwise known as the distance between contour lines, listed in the legend. Depending on the scale of the map, the contour interval ranges from 1 foot to hundreds of feet between each successive contour line. The contour interval allows the map reader to instantly know the relative steepness & flatness of the topography in the map at one quick glance. Because of this crucial information, a topographic map is considered incomplete when it does not disclose this information to the reader.
Enter the Terrain feature of Google Maps. Released to the public in November of 2007, the contour lines were subsequently added in April of 2008. I hadn’t really given the feature much use until last week when I was planning my weekend excursion to the Shenandoah mountains. I was trying to figure out the altitude variation on my friends property by finding where their property line started & ended and calculating the elevation change. Since their property lies on the side of a mountain, I wanted to know the altitude at the bottom of the property and the altitude of the highest portion of the property, and subtract the difference to find the total elevation variance.
What I found out instead was that Terrain function of Google Maps was lacking the contour interval declaration in the legend. As with all their maps, the lower left-hand corner showed the units of distance on the map, but was missing the topographical information provided by the contour interval declaration.
In lieu of ever getting a response from Google Maps after previous queries, I decided to send a tweet to Google Maps:
I wasn’t really expecting a response, but a couple hours later I received this response on Twitter:
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