#!/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 21.421784162521 56.639970237721 -gcp 10524.0 0.0 21.423881649971 56.612945526614 -gcp 10524.0 12543.0 21.365629434586 56.611369127389 -gcp 0.0 12543.0 21.36357486248 56.638439216933 Aizpute-1988-991/Aizpute-1988-991-89.jpg Aizpute-1988-991-89.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "465.0 1197.0\n10341.0 1242.0\n10284.0 11163.0\n414.0 11109.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-89.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-89.vrt Aizpute-1988-991-89.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-89.cut.vrt Aizpute-1988-991-89.xyz