#!/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 26.995854377746586 57.41296297601905 -gcp 11400.0 0.0 26.99228167533875 57.38448781851796 -gcp 11400.0 11451.0 26.940042972564697 57.38645971061921 -gcp 0.0 11451.0 26.94358348846436 57.414719548748174 Aluksne-1989-1186/Aluksne-1989-1186-41.jpg Aluksne-1989-1186-41.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1143.0 1824.0\n1929.0 10302.0\n10335.0 9501.0\n9543.0 1017.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-41.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-41.vrt Aluksne-1989-1186-41.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-41.cut.vrt Aluksne-1989-1186-41.xyz