#!/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 26.74483143494921 57.60153488451528 -gcp 10485.0 0.0 26.743430623561608 57.57495775946536 -gcp 10485.0 13332.0 26.680955068931834 57.576718562098435 -gcp 0.0 13332.0 26.68334382400179 57.60208212468596 Aluksne-1989-1185/Aluksne-1989-1185-162.jpg Aluksne-1989-1185-162.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1053.0 1059.0\n1029.0 9510.0\n9576.0 9498.0\n9579.0 1056.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-162.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-162.vrt Aluksne-1989-1185-162.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-162.cut.vrt Aluksne-1989-1185-162.xyz