#!/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 26.95849368915272 57.451796639431294 -gcp 10506.0 0.0 26.958845424956635 57.4259700063872 -gcp 10506.0 10488.0 26.9105415146966 57.42551732943876 -gcp 0.0 10488.0 26.910093219368243 57.451543199045624 Aluksne-1989-1186/Aluksne-1989-1186-56.jpg Aluksne-1989-1186-56.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1020.0 960.0\n9480.0 1008.0\n9405.0 9423.0\n957.0 9378.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-56.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-56.vrt Aluksne-1989-1186-56.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-56.cut.vrt Aluksne-1989-1186-56.xyz