#!/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 21.405572891235 56.535204504558 -gcp 10506.0 0.0 21.405862569809 56.508489610886 -gcp 10506.0 12195.0 21.349859446064 56.508185345306 -gcp 0.0 12195.0 21.349651046607 56.535003472339 Aizpute-1988-991/Aizpute-1988-991-21.jpg Aizpute-1988-991-21.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "324.0 876.0\n534.0 10761.0\n10407.0 10518.0\n10140.0 603.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-21.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-21.vrt Aizpute-1988-991-21.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-21.cut.vrt Aizpute-1988-991-21.xyz