#!/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 26.927816898345952 57.529104428137934 -gcp 10485.0 0.0 26.928213865280156 57.50337753010821 -gcp 10485.0 10542.0 26.87981185245514 57.50308359377784 -gcp 0.0 10542.0 26.87960264015198 57.52881639529205 Aluksne-1989-1185/Aluksne-1989-1185-33.jpg Aluksne-1989-1185-33.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1059.0 1098.0\n9531.0 1089.0\n9534.0 9510.0\n1035.0 9510.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-33.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-33.vrt Aluksne-1989-1185-33.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-33.cut.vrt Aluksne-1989-1185-33.xyz