#!/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 21.41548846540952 56.513451515272635 -gcp 10524.0 0.0 21.415500466093047 56.48656759997454 -gcp 10524.0 12207.0 21.359594339085692 56.48654653684344 -gcp 0.0 12207.0 21.35914782054175 56.51333872050945 Aizpute-1988-991/Aizpute-1988-991-7.jpg Aizpute-1988-991-7.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "228.0 906.0\n10098.0 780.0\n10215.0 10701.0\n339.0 10815.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-7.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-7.vrt Aizpute-1988-991-7.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-7.cut.vrt Aizpute-1988-991-7.xyz