Stitch together and crop map tiles for any bounding box.

The tiles should come from a web map service in PNG or JPEG format, and will be written out as PNG.

To get standard OpenStreetMap tiles at zoom level 10 for the area of the Exploratorium's Bay Model video projection:

$ ./stitch -o baymodel.png -- 37.371794 -122.917099 38.226853 -121.564407 10 http://a.tile.openstreetmap.org/{z}/{x}/{y}.png

To get the MapQuest Open Aerial imagery at zoom level 11 to match the "See Something or Say Something" bounding box of London:

$ ./stitch -o london.png -- 51.316252 -0.366258 51.606525 0.099606 11 http://otile1.mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg

To get a 640x480 image from Stamen's watercolor map at zoom level 10 around Tokyo:

$ ./stitch -o tokyo.png -c -- 35.6824 139.7531 640 480 10 http://b.tile.stamen.com/watercolor/{z}/{x}/{y}.jpg

The arguments are minlat minlon maxlat maxlon zoom url. If you don't specify -o outfile the PNG will be written to the standard output. URLs should include {z}, {x}, and {y} tokens for tile zoom, x, and y.

The -- is to keep getopt, especially GNU getopt, from interpreting the minus signs in latitudes or longitudes as option flags.

• pkg-config
• libcurl to retrieve the tiles
• libjpeg >= 8 for jpeg_mem_src
• libpng

To install on Ubuntu do:

sudo apt-get update
sudo apt-get install git build-essential pkg-config libcurl4-openssl-dev libpng-dev libjpeg-dev
git clone [email protected]:ericfischer/tile-stitch.git
cd tile-stitch
make