#!/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 21.547268629074 56.596889155221 -gcp 10752.0 0.0 21.548362970352 56.569567608832 -gcp 10752.0 12714.0 21.48966550827 56.568881952808 -gcp 0.0 12714.0 21.488592624664 56.59627487382 Aizpute-1988-991/Aizpute-1988-991-58.jpg Aizpute-1988-991-58.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "456.0 1434.0\n10308.0 1449.0\n10290.0 11331.0\n448.5 11304.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-58.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-58.vrt Aizpute-1988-991-58.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-58.cut.vrt Aizpute-1988-991-58.xyz