#!/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 26.895332828787772 57.41812170689903 -gcp 10665.0 0.0 26.896707128894352 57.392568653650414 -gcp 10665.0 10707.0 26.848108595155598 57.39111063801219 -gcp 0.0 10707.0 26.846964965024288 57.41722440532814 Aluksne-1989-1186/Aluksne-1989-1186-91.jpg Aluksne-1989-1186-91.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1164.0 1017.0\n9657.0 1152.0\n9513.0 9564.0\n1014.0 9429.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-91.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-91.vrt Aluksne-1989-1186-91.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-91.cut.vrt Aluksne-1989-1186-91.xyz