#!/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 21.366477012634 56.576724879129 -gcp 10512.0 0.0 21.368418931961 56.549711064687 -gcp 10512.0 12513.0 21.310569047928 56.54830056524 -gcp 0.0 12513.0 21.308380365372 56.574990355405 Aizpute-1988-991/Aizpute-1988-991-47.jpg Aizpute-1988-991-47.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "246.0 1147.5\n10119.0 1236.0\n10033.5 11143.5\n138.0 11032.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-47.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-47.vrt Aizpute-1988-991-47.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-47.cut.vrt Aizpute-1988-991-47.xyz