This list of resources is all about acquring and processing aerial imagery. It's generally broken up in three ways: how to go about this in Photoshop/GIMP, using command-line tools, or in GIS software, depending what's most comfortable to you. Often these tools can be used in conjunction with each other.
| #! /bin/bash | |
| # Convert Landsat 8 GeoTIFF images into RGB pan-sharpened JPEGs. | |
| # | |
| # Requirements: | |
| # * gdal http://www.mapbox.com/tilemill/docs/guides/gdal/ | |
| # * convert (image-magick) | |
| # | |
| # Reference info: | |
| # http://www.mapbox.com/blog/putting-landsat-8-bands-to-work/ |
| # 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/ |
| # 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 && \ |
http://briantjacobs.com/mrsid-gdal-homebrew/
brew install gdal --enable-unsupported --complete --with-postgres
https://github.com/nvkelso/geo-how-to/wiki/Installing-Open-Source-Geo-Software:-Mac-Edition
brew tap homebrew/science
brew install pyqt
See