#!/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 27.023162738326665 57.35677262369865 -gcp 10644.0 0.0 27.025704669092313 57.330204159367085 -gcp 10644.0 10782.0 26.976370880850293 57.3292228769557 -gcp 0.0 10782.0 26.97487501160036 57.3552240133198 Aluksne-1989-1186/Aluksne-1989-1186-30.jpg Aluksne-1989-1186-30.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1059.0 1230.0\n9489.0 1086.0\n9618.0 9597.0\n1191.0 9735.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-30.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-30.vrt Aluksne-1989-1186-30.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-30.cut.vrt Aluksne-1989-1186-30.xyz