#!/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 4815.0 1740.0 23.337216666666666 57.25 -gcp 26295.0 1710.0 23.837216666666666 57.25 -gcp 26373.0 21477.0 23.837216666666666 57 -gcp 4728.0 21474.0 23.337216666666666 57 lnb/src1/raw/35101041.jpg 35101041.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4815.0 1740.0\n26295.0 1710.0\n26373.0 21477.0\n4728.0 21474.0" | \
  gdaltransform -tps -output_xy 35101041.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  35101041.vrt 35101041.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 35101041.cut.vrt 35101041.xyz