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Post by kaima on Mar 14, 2017 6:25:26 GMT -7
I haven't explored this far enough to see where the limits of the data are, but here is a link to the San Francisco area. From there you can zoom out to look and look at the map to see other areas of the country, e.g., Boise, Idaho. The text explaining the educational levels and social demographics makes for interesting reading. Kia personal.tcu.edu/kylewalker/maps/education/#7/43.213/-117.566 personal.tcu.edu/kylewalker/maps/education/#7/43.213/-117.566Looking at Anchorage, Alaska, and knowing the areas of the University and the medical centers, data impresses me as rather thin and population as well mixed, not fitting preconceptions of some concentrations I expected. Jumping to Phoenix, Arizona, I am impressed with the segregation of the colors and also the rectangular dividing lines between lighted data points and dark black - reflecting life in the desert and sharp, rectangular division of land and development along straight property lines. Lines that divide development from fully undeveloped land. Enjoy - and drop a note with your most intersting observation! Kai |
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Post by kaima on Mar 14, 2017 6:37:21 GMT -7
github.com/walkerke/education_mapEducational Attainment in America is an interactive dot-density map of the US population aged 25 and over by educational attainment. Data are summarized into five categories, which represent the highest education attained: less than high school; high school or equivalent; some college or associate's degree; bachelor's degree; and graduate degree. Data are from the 2011-2015 American Community Survey Table B15003, distributed by NHGIS. Dot locations are approximate and do not represent the locations of individuals. Also, as the ACS is a survey of the US population, its estimates are subject to a margin of error. Data preparation was completed in the R and Python programming languages, with heavy reliance on the arcpy site package via ArcGIS Pro and the sf R package. The map itself is hosted by Mapbox and designed with Mapbox GL JS and dimple.js. Major features of the map are described below; a manuscript describing the full methodology is currently in progress. Dasymetric dot-density mapping. The map is a dasymetric dot-density map, which means that the dots are placed in relationship to ancillary geographic information that in this case describes the underlying population surface. Educational attainment data are aggregated at the Census tract level, and dots are placed randomly within Census tracts. Prior to the dot placement, however, Census blocks with no population in 2010 were erased from the Census tract geographies, meaning that dots are constrained to areas within tracts that had a measured population in 2010. Given the temporal difference between the block data and tract data, some areas that went from 0 population to populated between 2010 and 2015 may be excluded. Zoom-dependent data and styling. To facilitate clarity at different zoom levels, the map displays progressively fewer dots as the user zooms out. When fully zoomed in, one dot represents approximately 25 people; when fully zoomed out, one dot represents approximately 500 people. Additionally, dot sizes increase as the user zooms in. Filter data with an interactive legend. One issue with dot-density maps is that dots can occlude other dots, especially in high-density areas like Manhattan. To help resolve this, users can click entries in the legend to turn on and off dots for each category. Summarize visible data with an interactive chart. While dot-density maps are effective at giving a general sense of the distribution of a multivariate attribute, it can be difficult for users to summarize the visible data. By clicking the corresponding button, the map will tabulate the visible dots on the screen and provide a percentage breakdown of the visible dots by category on a chart in the sidebar.
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Post by Jaga on Mar 18, 2017 12:06:59 GMT -7
Kai, I cannot access any of these links.
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Post by kaima on Mar 18, 2017 19:18:17 GMT -7
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Post by karl on Mar 19, 2017 9:57:24 GMT -7
Kai
Interesting survey I must say. Only was I able to access the urls you have most kindly provided, was to paint and past for the search engine to locate. But this is ok.
My survey was touching upon the west Coast area finding a concentration being from Portland/Seattle through Bellingham and stopping at the Canadian border. With this, a dote on Brandon/Winnipeg and Regina which is not suprise. Nothing on the Vancouver area so we must make the assumption that the better part of Canada is stupid..{I am sure they would have some thing to say over that comment...}
Juneau Alaska was touched and this is no surprise being Alaska is such a rugged land.
Interesting as my self am not very educated on your land and the people as it seems to have gone only as far North as Canada.
Karl
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Post by Jaga on Mar 27, 2017 21:43:56 GMT -7
Kai, maybe my computer has a firewall... anyways, I am not able to see it. Don't worry
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