#!/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 756.0 1548.0 23.126666666666665 56.75 -gcp 26313.0 1530.0 23.576666666666668 56.75 -gcp 26397.0 27216.0 23.576666666666668 56.5 -gcp 675.0 27240.0 23.126666666666665 56.5 V-14 Doblen.jpg V-14 Doblen.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "756.0 1548.0\n26313.0 1530.0\n26397.0 27216.0\n675.0 27240.0" | \
  gdaltransform -tps -output_xy V-14 Doblen.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  V-14 Doblen.vrt V-14 Doblen.cut.vrt

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