#!/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 26.863677474236464 57.54708760415802 -gcp 10485.0 0.0 26.86349099614891 57.5213246082483 -gcp 10485.0 13266.0 26.80297207198702 57.52097052116424 -gcp 0.0 13266.0 26.80325488973942 57.54691782855779 Aluksne-1989-1185/Aluksne-1989-1185-73.jpg Aluksne-1989-1185-73.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1011.0 1008.0\n996.0 9534.0\n9432.0 9540.0\n9444.0 1011.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-73.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-73.vrt Aluksne-1989-1185-73.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-73.cut.vrt Aluksne-1989-1185-73.xyz