kjordahl

kjordahl

tmcw

hexer is cool. It's a new project by Howard Butler that makes hexagon binned files out of point files.

Building hexer

This worked on my system (OSX 10.9, git via homebrew)

git clone https://github.com/hobu/hexer.git

joyrexus

Map tweets from a place

This is a very simple node-based client demonstrating how you can use the Twitter streaming API with the locations parameter specified. It uses geojson.io to map any tweets it hears within a user-specified duration.

Setup

Before running the map.coffee script, place your app's OAuth keys in keys.json and run npm install to install dependencies (viz., ntwitter and opener).

lelandbatey

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

stephanh42

"""
Utility functions for hex grids.
"""

from math import sqrt
from heapq import heappush, heappop
import numpy
import numpy.random

neighbours = numpy.array(((2, 0), (1, 1), (-1, 1), (-2, 0), (-1, -1), (1, -1)))

ashaw

# https://www.mapbox.com/blog/processing-landsat-8/
task :landsat_2014 => :environment do
  dirs = Dir["#{Rails.root.to_s}/db/initial/raster/*"].reject {|q| q =~ /tar\.gz/ }
  dirs.each do |dir|
    scene_id = dir.split("/")[-1]
    [4,3,2].each do |band|
      `gdalwarp -t_srs EPSG:3857 #{dir}/#{scene_id}_B#{band}.TIF #{dir}/#{scene_id}_B#{band}-projected.tif`
    end
    `convert -combine #{dir}/#{scene_id}_B{4,3,2}-projected.tif #{dir}/#{scene_id}_RGB-projected.tif && \
     convert -channel B -gamma 0.925 -channel R -gamma 1.03 -channel RGB -sigmoidal-contrast 50x16% #{dir}/#{scene_id}_RGB-projected.tif #{dir}/#{scene_id}_RGB-projected-corrected.tif && \

danielballan

# This is Dan Allan's setting of Professor Robert Leheny's plotting style preferences.
# Updated October 2014
#
# Invoke in Python matplotlib like so:
#
#     import matplotlib as mpl
#
#     mpl.style.use('https://gist.github.com/danielballan/be066529de85e87a5fe7/raw')
#
# This feature is only available in matplotlib version 1.4 or higher.

dwtkns

# This is a shell function to quickly grab the data for a given Landsat 8 tile ID from Google's servers
# For example:
# l8get LC81690352014169LGN00

# The echo at the end is to remind myself of the syntax for extracting bands 8, 4, 3, and 2. (Pansharp, Red, Green, Blue)

# On OSX this would go into your ~/.bash_profile file.
# Requires gsutil from https://developers.google.com/storage/docs/gsutil_install
# Most useful in conjunction with USGS' Earth Explorer: http://earthexplorer.usgs.gov/

ftrain

#!/bin/bash
#
#                  _     _  __
#  __ _  __ _ _ __| |__ (_)/ _|_   _
# / _` |/ _` | '__| '_ \| | |_| | | |
#| (_| | (_| | |  | |_) | |  _| |_| |
# \__, |\__,_|_|  |_.__/|_|_|  \__, |
# |___/                        |___/
#
#