#!/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 27.023829189129174 57.52358781964708 -gcp 10485.0 0.0 27.0197534468025 57.4969924829598 -gcp 10485.0 13260.0 26.95888741873205 57.4999659466819 -gcp 0.0 13260.0 26.962610576301817 57.525993400166925 Aluksne-1989-1185/Aluksne-1989-1185-100.jpg Aluksne-1989-1185-100.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1014.0 1029.0\n1002.0 9531.0\n9441.0 9522.0\n9447.0 1008.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-100.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-100.vrt Aluksne-1989-1185-100.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-100.cut.vrt Aluksne-1989-1185-100.xyz