#!/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 21.340556144714 56.600243900507 -gcp 11703.0 0.0 21.345153450966 56.570386242203 -gcp 11703.0 12828.0 21.28603219986 56.567274158905 -gcp 0.0 12828.0 21.2810754776 56.59736757901 Aizpute-1988-991/Aizpute-1988-991-67.jpg Aizpute-1988-991-67.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1368.0 1050.0\n11211.0 1722.0\n10533.0 11625.0\n687.0 10942.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-67.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-67.vrt Aizpute-1988-991-67.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-67.cut.vrt Aizpute-1988-991-67.xyz