#!/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 2103.0 780.0 28 58 -gcp 13269.0 702.0 30 58 -gcp 13578.0 11193.0 30 57 -gcp 2085.0 11292.0 28 57 txu-oclc-6519747-no-35-9.jpg txu-oclc-6519747-no-35-9.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2103.0 780.0\n13269.0 702.0\n13578.0 11193.0\n2085.0 11292.0" | \
  gdaltransform -tps -output_xy txu-oclc-6519747-no-35-9.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  txu-oclc-6519747-no-35-9.vrt txu-oclc-6519747-no-35-9.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES txu-oclc-6519747-no-35-9.cut.vrt txu-oclc-6519747-no-35-9.xyz