#!/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 26.96125388145447 57.613583910250526 -gcp 10485.0 0.0 26.960706710815433 57.58677164967998 -gcp 10485.0 13260.0 26.89852237701416 57.587432995918896 -gcp 0.0 13260.0 26.898565292358402 57.613463230399795 Aluksne-1989-1185/Aluksne-1989-1185-60.jpg Aluksne-1989-1185-60.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1002.0 1008.0\n9462.0 1017.0\n9450.0 9447.0\n963.0 9444.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-60.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-60.vrt Aluksne-1989-1185-60.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-60.cut.vrt Aluksne-1989-1185-60.xyz