#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 1467.0 720.0 24.837216666666666 57.5 -gcp 12084.0 735.0 25.337216666666666 57.5 -gcp 12051.0 10584.0 25.337216666666666 57.25 -gcp 1377.0 10563.0 24.837216666666666 57.25 bruno/Q12 1918 lnb.jpg Q12 1918 lnb.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1467.0 720.0\n12084.0 735.0\n12051.0 10584.0\n1377.0 10563.0" | \
  gdaltransform -tps -output_xy Q12 1918 lnb.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Q12 1918 lnb.vrt Q12 1918 lnb.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Q12 1918 lnb.cut.vrt Q12 1918 lnb.xyz