#!/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 26.810052600533805 57.39566953846611 -gcp 11715.0 0.0 26.802584811060363 57.366635292135264 -gcp 11715.0 11847.0 26.74847183980907 57.370523164964176 -gcp 0.0 11847.0 26.755987909044784 57.399748163950015 Aluksne-1989-1186/Aluksne-1989-1186-125.jpg Aluksne-1989-1186-125.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1206.0 2199.0\n9555.0 1122.0\n10626.0 9546.0\n2286.0 10650.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-125.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-125.vrt Aluksne-1989-1186-125.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-125.cut.vrt Aluksne-1989-1186-125.xyz