#!/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 26.652330981748822 57.454904742498314 -gcp 10902.0 0.0 26.64590540322725 57.427692831781606 -gcp 10902.0 11277.0 26.594007736758517 57.431060551544064 -gcp 0.0 11277.0 26.60035821342757 57.45855818045715 Aluksne-1989-1186/Aluksne-1989-1186-6.jpg Aluksne-1989-1186-6.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "972.0 1680.0\n9360.0 1008.0\n10023.0 9471.0\n1638.0 10155.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-6.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-6.vrt Aluksne-1989-1186-6.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-6.cut.vrt Aluksne-1989-1186-6.xyz