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tile-stitch

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 or a georeferenced TIFF.

Optionally, a separate worldfile with georeferencing data can be written.

Examples

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 do the same, but outputting a TIFF with a TFW world file:

$ ./stitch -f geotiff -w -o baymodel.tif -- 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

To get an image using 512x512 retina tiles of Stamen's Toner map at zoom level 14 around Köln:

$ ./stitch -o köln.png -t 512 -- 50.88 6.88 50.98 7.04 14 http://b.tile.stamen.com/toner/{z}/{x}/{y}@2x.png

Format

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.

Restrictions

GeoTIFF is currently only supported when an output filename is specified. A worldfile cannot be generated unless an output filename is specified.

Requirements

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

Installation

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 libtiff-dev libgeotiff-dev
git clone git@github.com:ericfischer/tile-stitch.git
cd tile-stitch
make

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Stitch together and crop map tiles for a specified bounding box

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