#!/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 26.67614579200745 57.58341297539606 -gcp 10485.0 0.0 26.675609350204468 57.55690653364457 -gcp 10485.0 10578.0 26.62647128105164 57.55692380046877 -gcp 0.0 10578.0 26.6263210773468 57.58362577731608 Aluksne-1989-1185/Aluksne-1989-1185-180.jpg Aluksne-1989-1185-180.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1059.0 984.0\n1017.0 9492.0\n9453.0 9534.0\n9498.0 1008.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-180.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-180.vrt Aluksne-1989-1185-180.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-180.cut.vrt Aluksne-1989-1185-180.xyz