#!/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 21.349495643994743 56.51406377728808 -gcp 10839.0 0.0 21.350047624466846 56.48649605579863 -gcp 10839.0 12606.0 21.292087590680936 56.486156136211214 -gcp 0.0 12606.0 21.291594618807046 56.51387783475826 Aizpute-1988-991/Aizpute-1988-991-10.jpg Aizpute-1988-991-10.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "588.0 1488.0\n669.0 11397.0\n10533.0 11313.0\n10443.0 1395.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-10.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-10.vrt Aizpute-1988-991-10.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-10.cut.vrt Aizpute-1988-991-10.xyz