#!/bin/sh

infile=$1

# Sizes are metric sizes (in inches) multiplied by resolution (in dpi)
dpi=200
xtilesize=2200
ytilesize=3400

# With a 0.5 inch margin on all sides the values would be
# xtilesize=2000
# ytilesize=3200

xdim=`ecconv -info $infile | grep Dimension | awk '{print $3}'`
ydim=`ecconv -info $infile | grep Dimension | awk '{print $5}'`

ytile=0
yoff=0
while [ $yoff -lt $ydim ]; do
  xtile=0
  xoff=0
  while [ $xoff -lt $xdim ]; do
    ecconv -exp tif -crop ${xtilesize}x$ytilesize+$xoff+$yoff $infile $infile.x$xtile-y$ytile
    xoff=`expr $xoff + 2200`
    xtile=`expr $xtile + 1`
  done
  yoff=`expr $yoff + 3400`
  ytile=`expr $ytile + 1`
done