#!/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 21.311335921062 56.638956874329 -gcp 12396.0 0.0 21.302712613379 56.6074289598 -gcp 12396.0 13611.0 21.240203976631 56.612366931711 -gcp 0.0 13611.0 21.248729669865 56.643883051998 Aizpute-1988-991/Aizpute-1988-991-94.jpg Aizpute-1988-991-94.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "607.5 2389.5\n2268.0 12162.0\n12004.5 10515.0\n10329.0 729.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-94.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-94.vrt Aizpute-1988-991-94.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-94.cut.vrt Aizpute-1988-991-94.xyz