#!/bin/bash

# Script to download tiles
# zern
# Last update: 2018-08-14
zoom=16
hi=5120
wi=45882
col=24
cols=1
rows=$[hi/256+1]
str=0
stp=$[wi/256]
ce='you-chun-tu'
for ((p=str;p<=stp;p=p+col)) do
url='http://minghuaji.dpm.org.cn/image-bundle/'$ce'/'$zoom'/'
cols=$[p+col]
for ((i = 0; i < $rows; i++)) do
string=''
for ((j =p; j < $cols; j++)) do
#image=$j'-'$i'.jpg'
image=$j'_'$i'.jpg'
file=$url$image
string=$string' '$image
wget --user-agent="Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.204 Safari/534.16" -c -t 40 -O $image $file -q
done
montage $string -tile $col''x1 -mode concatenate row$i.jpg
done
string=''
for ((i = 0; i<$rows; i++)) do
string=$string' 'row$i.jpg
done
convert -limit memory 0  -strip +profile "*" -quality 85 $string -append -density 120 -units PixelsPerInch jpg/$ce'-'$p'-'$cols.jpg
string=*.jpg
rm $string
sleep 4s
done