#!/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 853.5 1065.8381615598887 26 56 -gcp 12084.0 1060.9403899721449 26.5 56 -gcp 12162.75 13812.117409470753 26.5 55.68333333333333 -gcp 837.0 13836.172144846798 26 55.68333333333333 79-Ilukste_1933.jpg 79-Ilukste_1933.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"853.5 1065.8381615598887\n12084.0 1060.9403899721449\n12162.75 13812.117409470753\n837.0 13836.172144846798\" | \
  gdaltransform -tps -output_xy 79-Ilukste_1933.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  79-Ilukste_1933.vrt 79-Ilukste_1933.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 79-Ilukste_1933.cut.vrt 79-Ilukste_1933.xyz