#!/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 21.409523415709 56.597447293648 -gcp 10629.0 0.0 21.411430835724 56.57024734176 -gcp 10629.0 12453.0 21.353838443756 56.568781467691 -gcp 0.0 12453.0 21.351853609085 56.596139021777 Aizpute-1988-991/Aizpute-1988-991-64.jpg Aizpute-1988-991-64.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "429.0 1014.0\n10296.0 1200.0\n10098.0 11124.0\n231.0 10921.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-64.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-64.vrt Aizpute-1988-991-64.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-64.cut.vrt Aizpute-1988-991-64.xyz