#!/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 26.989887789627 57.584984533172 -gcp 10485.0 0.0 26.988762617111 57.55916265623 -gcp 10485.0 13266.0 26.927908658981 57.559824510904 -gcp 0.0 13266.0 26.929389503555 57.585467047385 Aluksne-1989-1185/Aluksne-1989-1185-42.jpg Aluksne-1989-1185-42.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1077.0 1056.0\n9477.0 1053.0\n9456.0 9552.0\n1044.0 9537.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-42.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-42.vrt Aluksne-1989-1185-42.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-42.cut.vrt Aluksne-1989-1185-42.xyz