#!/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 26.6784443435669 57.41193547662922 -gcp 10506.0 0.0 26.678275532015483 57.38538608933139 -gcp 10506.0 10608.0 26.62942985916138 57.38528147142525 -gcp 0.0 10608.0 26.628957790374756 57.41175054395337 Aluksne-1989-1186/Aluksne-1989-1186-179.jpg Aluksne-1989-1186-179.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1074.0 1041.0\n9474.0 1050.0\n9432.0 9552.0\n1014.0 9519.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-179.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-179.vrt Aluksne-1989-1186-179.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-179.cut.vrt Aluksne-1989-1186-179.xyz