#!/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 21.47700548172 56.536015004543 -gcp 10575.0 0.0 21.478362679482 56.509096441925 -gcp 10575.0 12459.0 21.420963406563 56.508066309482 -gcp 0.0 12459.0 21.419541835785 56.535198585453 Aizpute-1988-991/Aizpute-1988-991-24.jpg Aizpute-1988-991-24.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "264.0 925.5\n403.5 10827.0\n10284.0 10662.0\n10101.0 745.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-24.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-24.vrt Aizpute-1988-991-24.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-24.cut.vrt Aizpute-1988-991-24.xyz