#!/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 26.77696433692134 57.420242993575734 -gcp 11583.0 0.0 26.77002554572918 57.39114682078923 -gcp 11583.0 11724.0 26.716192402867765 57.39515839871423 -gcp 0.0 11724.0 26.7232235622406 57.423943564969434 Aluksne-1989-1186/Aluksne-1989-1186-144.jpg Aluksne-1989-1186-144.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "996.0 2028.0\n9357.0 996.0\n10383.0 9444.0\n2022.0 10485.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-144.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-144.vrt Aluksne-1989-1186-144.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-144.cut.vrt Aluksne-1989-1186-144.xyz