My goal here was the create a routable graph for Chicago.
I used Ubuntu 12.04LTS on an m2.4xlarge just to be sure memory wasn't too much of an issue.
Start a screen session and start downloading an OSM extract (I used this extract of Illinois). In another screen I did the following:
sudo apt-get update && sudo apt-get upgrade -y
sudo apt-get -y install git make cmake build-essential \
| var tileReduce = require('tile-reduce'); | |
| var path = require('path'); | |
| tileReduce({ | |
| zoom: 14, | |
| map: path.join(__dirname, '/process.js'), | |
| sources: [ | |
| {name: 'ways', mbtiles: 'ways.mbtiles')} | |
| ] | |
| }); |
| Step One | |
| Fetch URL based on column: | |
| 'http://www.datasciencetoolkit.org/maps/api/geocode/json?sensor=false&address=' + escape(value, 'url')' | |
| Step Two | |
| Parse Json for longitude: | |
| value.parseJson()["results"][0]["geometry"]["location"]["lng"] |
Using d3.geo.tile to display raster image tiles underneath some TopoJSON vectors, and d3.behavior.zoom for pan & zoom.
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .link { | |
| stroke: #000; | |
| } | |
| .node { | |
| fill: #ccc; |
| # ----------------------------------------------------------------- # | |
| REFERENCES | |
| # ----------------------------------------------------------------- # | |
| http://ndpsoftware.com/git-cheatsheet.html | |
| # ----------------------------------------------------------------- # | |
| BASIC | |
| # ----------------------------------------------------------------- # |
The Natural Earth Gray Earth raster data set, reprojected to the U.S. National Atlas projection (a rotated Lambert azimuthal equal-area projection) via gdalwarp.
gdalwarp \
-r lanczos \
-ts 960 0 \
-t_srs EPSG:2163 \
-te -2100000 -2200000 2600000 750000 \
GRAY_HR_SR_OB_DR.tif \
shaded-relief.tiff
| # http://henrik.nyh.se/2008/12/git-dirty-prompt | |
| # http://www.simplisticcomplexity.com/2008/03/13/show-your-git-branch-name-in-your-prompt/ | |
| # username@Machine ~/dev/dir[master]$ # clean working directory | |
| # username@Machine ~/dev/dir[master*]$ # dirty working directory | |
| function parse_git_dirty { | |
| [[ $(git status 2> /dev/null | tail -n1) != "nothing to commit (working directory clean)" ]] && echo "*" | |
| } | |
| function parse_git_branch { | |
| git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/[\1$(parse_git_dirty)]/" |