#!/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 21.530628204346 56.619197338353 -gcp 10509.0 0.0 21.529866456985 56.592553532618 -gcp 10509.0 12390.0 21.473164558411 56.592181378341 -gcp 0.0 12390.0 21.472413539886 56.619096986503 Aizpute-1988-991/Aizpute-1988-991-81.jpg Aizpute-1988-991-81.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "60.0 1158.0\n9903.0 738.0\n10317.0 10629.0\n435.0 11010.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-81.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-81.vrt Aizpute-1988-991-81.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-81.cut.vrt Aizpute-1988-991-81.xyz