#!/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 2415.0 783.0 24 59 -gcp 13230.0 792.0 26 59 -gcp 13443.0 11241.0 26 58 -gcp 2328.0 11241.0 24 58 txu-oclc-6519747-no-35-4.jpg txu-oclc-6519747-no-35-4.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2415.0 783.0\n13230.0 792.0\n13443.0 11241.0\n2328.0 11241.0" | \
  gdaltransform -tps -output_xy txu-oclc-6519747-no-35-4.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  txu-oclc-6519747-no-35-4.vrt txu-oclc-6519747-no-35-4.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES txu-oclc-6519747-no-35-4.cut.vrt txu-oclc-6519747-no-35-4.xyz