#!/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 561.0 2046.0 23.126666666666665 56.5 -gcp 25980.0 2025.0 23.576666666666668 56.5 -gcp 26130.0 27459.0 23.576666666666668 56.25 -gcp 507.0 27498.0 23.126666666666665 56.25 VI-14_Szagarren.jpg VI-14_Szagarren.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "561.0 2046.0\n25980.0 2025.0\n26130.0 27459.0\n507.0 27498.0" | \
  gdaltransform -tps -output_xy VI-14_Szagarren.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  VI-14_Szagarren.vrt VI-14_Szagarren.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES VI-14_Szagarren.cut.vrt VI-14_Szagarren.xyz