lxbarth

Creating a choropleth map with TileMill, QGIS and SQLite

1. Download shape file

For instance "Presidential General Election, State Results, 2008" from

http://www.nationalatlas.gov/atlasftp.html?openChapters=chphist%2Cchpref%2Cchpgeol#chpgeol

tmcw

import subprocess
import sys, re
MERC = '+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs'

infile = sys.argv[1]

info_output = subprocess.Popen(['gdalinfo', infile], stdout=subprocess.PIPE).communicate()[0]

size_is_re = re.compile('Size is (?P<width>\d+), (?P<height>\d+)')
size_is = filter(lambda x: x, map(lambda x: size_is_re.match(x), info_output.split('\n')))

springmeyer

brew install fltk
sudo pip install mercurial

hg clone http://hg.orfeo-toolbox.org/OTB
cd OTB
mkdir build
cmake \
  -DBUILD_APPLICATIONS:BOOL=ON \
  -DCMAKE_BUILD_TYPE:STRING=Release \
  -DCMAKE_C_FLAGS:STRING=-Wall -Wno-uninitialized -Wno-unused-variable -fPIC \

cobyism

Deploying a subfolder to GitHub Pages

Sometimes you want to have a subdirectory on the master branch be the root directory of a repository’s gh-pages branch. This is useful for things like sites developed with Yeoman, or if you have a Jekyll site contained in the master branch alongside the rest of your code.

For the sake of this example, let’s pretend the subfolder containing your site is named dist.

Step 1

Remove the dist directory from the project’s .gitignore file (it’s ignored by default by Yeoman).

welch

It is a rite of passage to post one's successful build instructions for OpenCV on a Mac
after you've tried all the other conflicting instructions out there and still failed. 
brew failed for me (was this because I could never get a happy brew doctor situation? 
I'll never know). macports? nope. build-from-source recipes? I didn't find one that 
worked for me.

Here's what did work to build OpenCV 2.4.5 from the distribution tarball using cmake,
on Mac OSX 10.8.4, linked to an anaconda installation rather than the system python. 
It is a mashup of various bits of advice out there. If you're already comfortable with 
build/install from source, all you need to read is the cmake invocation in step 3 and 

bryanluman

import numpy as np
import rasterio

"""
2014-02-13
Bryan Luman
Use it however you like at your own risk

Problem:
I have a huge DEM converted from LiDAR LAS points. I'd like to make it slightly

brunosan