#!/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 26.712368047802038 57.34504276060054 -gcp 10935.0 0.0 26.709451311444933 57.31713500479602 -gcp 10935.0 10800.0 26.659390616220627 57.31907407926519 -gcp 0.0 10800.0 26.662757963692243 57.34627847052252 Aluksne-1989-1186/Aluksne-1989-1186-176.jpg Aluksne-1989-1186-176.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1062.0 1209.0\n9468.0 849.0\n9828.0 9324.0\n1416.0 9699.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-176.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-176.vrt Aluksne-1989-1186-176.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-176.cut.vrt Aluksne-1989-1186-176.xyz