#!/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 21.540114632826413 56.68407499841583 -gcp 11721.0 0.0 21.54537211524973 56.65447791681069 -gcp 11721.0 12993.0 21.485643088357506 56.650929116048715 -gcp 0.0 12993.0 21.48023003781122 56.68064432854819 Aizpute-1988-991/Aizpute-1988-991-111.jpg Aizpute-1988-991-111.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1557.0 801.0\n11382.0 1653.0\n10515.0 11508.0\n688.5 10663.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-111.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-111.vrt Aizpute-1988-991-111.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-111.cut.vrt Aizpute-1988-991-111.xyz