#!/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 0.0 0.0 26.95826534963692 57.37796309540561 -gcp 10506.0 0.0 26.960241221210325 57.351876930854004 -gcp 10506.0 12810.0 26.901191388676384 57.35061598501926 -gcp 0.0 12810.0 26.89879172807863 57.376785998825156 Aluksne-1989-1186/Aluksne-1989-1186-63.jpg Aluksne-1989-1186-63.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1035.375 984.75\n9480.0 981.0\n9450.0 9381.0\n1032.0 9387.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-63.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-63.vrt Aluksne-1989-1186-63.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-63.cut.vrt Aluksne-1989-1186-63.xyz