#!/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 26.772589879989628 57.45196165286689 -gcp 10506.0 0.0 26.770150319130146 57.42589867347138 -gcp 10506.0 10632.0 26.720775169372562 57.42732276688261 -gcp 0.0 10632.0 26.723618310928344 57.45384926315896 Aluksne-1989-1186/Aluksne-1989-1186-141.jpg Aluksne-1989-1186-141.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1041.0 993.0\n9465.0 987.0\n9450.0 9504.0\n1023.0 9510.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-141.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-141.vrt Aluksne-1989-1186-141.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-141.cut.vrt Aluksne-1989-1186-141.xyz