#!/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 26.99276449610328 57.43623056281708 -gcp 10701.0 0.0 26.99064552783966 57.41050132528193 -gcp 10701.0 10935.0 26.942239755881864 57.411971689705574 -gcp 0.0 10935.0 26.94519210203362 57.437529515685654 Aluksne-1989-1186/Aluksne-1989-1186-21.jpg Aluksne-1989-1186-21.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1092.0 1305.0\n9519.0 1050.0\n9753.0 9564.0\n1327.5 9820.5" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-21.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-21.vrt Aluksne-1989-1186-21.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-21.cut.vrt Aluksne-1989-1186-21.xyz