#!/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 1953.0 1176.0 21.837216666666666 57.5 -gcp 12507.0 1167.0 22.337216666666666 57.5 -gcp 12570.0 10878.0 22.337216666666666 57.25 -gcp 1929.0 10911.0 21.837216666666666 57.25 lnb/src1/raw/27342283.jpg 27342283.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1953.0 1176.0\n12507.0 1167.0\n12570.0 10878.0\n1929.0 10911.0" | \
  gdaltransform -tps -output_xy 27342283.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  27342283.vrt 27342283.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 27342283.cut.vrt 27342283.xyz