#!/bin/bash
# $Id$
# -*- sh -*- vim: ft=sh sw=4 sts=4

if [ "$#" != 3 -a "$#" != 4 ]; then
    echo "Usage: `basename $0` <LAT> <LON> <SCALE> [<IMAGE NAME>]" >&2
    exit 1
fi

i=1
j=10

while [ "`expr $i \* 3000`" -lt "$3" -a $i -lt 64 ]; do
    i="`expr $i \* 2`"
    j="`expr $j + 1`"
done

file=0
while [ -f "$HOME/.gpsdrive/top_file`printf %04d $file`.jpg" ]; do
    file="`expr $file + 1`"
done
file=file"`printf %04d $file`"

wget -q "http://terraservice.net/GetImageArea.ashx?t=1&lat=$1&lon=$2&s=$j&w=1280&h=1024" -O /tmp/terraservice-$$.jpg || exit 1

mv /tmp/terraservice-$$.jpg "$HOME/.gpsdrive/top_${4:-$file}.jpg"

echo "top_${4:-$file}.jpg" $1 $2 `expr 180352 \* $i / 64` >> "$HOME/.gpsdrive/map_koord.txt"
#echo "top_${4:-$file}.jpg" $1 $2 `expr 181417 \* $i / 64` >> "$HOME/.gpsdrive/map_koord.txt"