#!/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 2073.0 1071.0 21.837216666666666 57.75 -gcp 12567.0 1098.0 22.337216666666666 57.75 -gcp 12576.0 10827.0 22.337216666666666 57.5 -gcp 2001.0 10794.0 21.837216666666666 57.5 lnb/src1/raw/27342281.jpg 27342281.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2073.0 1071.0\n12567.0 1098.0\n12576.0 10827.0\n2001.0 10794.0" | \
  gdaltransform -tps -output_xy 27342281.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342281.vrt 27342281.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342281.cut.vrt 27342281.xyz