#!/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 354.0 781.6930362116991 23.5 56.75 -gcp 14891.25 811.6391364902506 24 56.75 -gcp 14882.25 13964.340459610028 24 56.5 -gcp 327.75 13922.399164345403 23.5 56.5 33-Jelgava_1939.jpg 33-Jelgava_1939.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"354.0 781.6930362116991\n14891.25 811.6391364902506\n14882.25 13964.340459610028\n327.75 13922.399164345403\" | \
  gdaltransform -tps -output_xy 33-Jelgava_1939.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  33-Jelgava_1939.vrt 33-Jelgava_1939.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 33-Jelgava_1939.cut.vrt 33-Jelgava_1939.xyz