#!/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 21.549042130987 56.53569379737 -gcp 10509.0 0.0 21.549242734909 56.509040199784 -gcp 10509.0 12480.0 21.492208242416 56.508693863029 -gcp 0.0 12480.0 21.492041641426 56.535288080773 Aizpute-1988-991/Aizpute-1988-991-27.jpg Aizpute-1988-991-27.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "261.0 1134.0\n414.0 11040.0\n10293.0 10869.0\n10104.0 954.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-27.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-27.vrt Aizpute-1988-991-27.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-27.cut.vrt Aizpute-1988-991-27.xyz