#!/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 21.29546480624 56.575930050003 -gcp 10506.0 0.0 21.296025182014 56.548832831681 -gcp 10506.0 12540.0 21.237496815034 56.548332337723 -gcp 0.0 12540.0 21.237124193891 56.575388256296 Aizpute-1988-991/Aizpute-1988-991-44.jpg Aizpute-1988-991-44.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "70.5 1282.5\n9921.0 1243.5\n9952.5 11143.5\n72.0 11157.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-44.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-44.vrt Aizpute-1988-991-44.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-44.cut.vrt Aizpute-1988-991-44.xyz