#!/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 27.024821469076617 57.53440712877308 -gcp 10485.0 0.0 27.021528482437137 57.507616839512565 -gcp 10485.0 10578.0 26.972369519109485 57.509885860526204 -gcp 0.0 10578.0 26.975940487470716 57.53586693362071 Aluksne-1989-1185/Aluksne-1989-1185-99.jpg Aluksne-1989-1185-99.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1008.0 993.0\n984.0 9507.0\n9417.0 9501.0\n9435.0 996.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-99.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-99.vrt Aluksne-1989-1185-99.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-99.cut.vrt Aluksne-1989-1185-99.xyz