#!/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 26.926005015373235 57.677899476836416 -gcp 10485.0 0.0 26.930237541198732 57.65185464808236 -gcp 10485.0 13266.0 26.868355085401536 57.649960310793766 -gcp 0.0 13266.0 26.86588583610557 57.675107732032714 Aluksne-1989-1185/Aluksne-1989-1185-19.jpg Aluksne-1989-1185-19.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1056.0 1101.0\n9555.0 1116.0\n9519.0 9543.0\n1026.0 9525.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-19.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-19.vrt Aluksne-1989-1185-19.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-19.cut.vrt Aluksne-1989-1185-19.xyz