maps

#!/bin/bash
# Google Maps downloader for a given latitude & longitude, zoom level & dimensions
# Usage :
#	maps latitude longitude zoom_level dimensions (in tile unit)
#	
#	conversion b/w pixels and tile units:
#		1 px = 1/256 tiles
#		or 256 px = 1 tile
#
#	(C) Raja Jamwal <linux1@zoho.com>
#

lat=$1
long=$2
zoom=$3

echo "Google Map Downloader (C) Raja Jamwal, <linux1@zoho.com>"

dim=( `echo $4 | sed 's/x/\n/g'` )
dim_x=${dim[0]}
dim_y=${dim[1]}

echo "Downloading $4 tile units Google satellite map for $lat $long at zoom $zoom"

cord=( `./globalmaptiles.py $zoom $lat $long | grep 'Google: [0-9]* [0-9]*' | sed 's/Google: //g' | sed 's/\t//g' | sed 's/ /\n/g'` )

# n total square matrix of tiles of zoom level
size=256
titlex=${cord[0]}
titley=${cord[1]}

startx=$(echo "$titlex-$dim_x" | bc)
starty=$(echo "$titley-$dim_y" | bc)

endx=$(echo "$titlex+$dim_x" | bc)
endy=$(echo "$titley+$dim_y" | bc)

#parameters start (x y) end (x y)
# $x co-ordinates start - end
for i in $(seq $startx $endx); 
do  
mkdir $i; 
done;

# crawl for map images in x(dir)/y(filename)
curl "http://khm1.google.co.in/kh/v=107&src=app&x=[$startx-$endx]&y=[$starty-$endy]&z=$zoom&s=Gali" -o "#1/#2.jpg"

echo "Stiching images job(1)"

# stich images in dir in y line (vertically)
for dir in $(ls); do convert $dir/*.jpg -append $dir.jpg;done;

echo "Stiching images job(2)"

#stich all y together
convert *.jpg +append map.jpg
#curl "http://khm1.google.co.in/kh/v=107&src=app&x=371[094-100]&y=2115[78-100]&z=19&s=Gali" -o "#1/#2.jpg"

echo "Map is generated in 'map.jpg', you may remove other files"
echo "Done.."