#!/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 1212.0 2064.0 21.776666666666667 57.25 -gcp 20466.0 2031.0 22.226666666666667 57.25 -gcp 20550.0 21750.0 22.226666666666667 57 -gcp 1167.0 21804.0 21.776666666666667 57 lnb/III-11_20053915.jpg III-11_20053915.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1212.0 2064.0\n20466.0 2031.0\n20550.0 21750.0\n1167.0 21804.0" | \
  gdaltransform -tps -output_xy III-11_20053915.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  III-11_20053915.vrt III-11_20053915.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES III-11_20053915.cut.vrt III-11_20053915.xyz