#!/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 849.0 1068.0 22.226666666666667 57.25 -gcp 12207.0 1011.0 22.676666666666666 57.25 -gcp 12279.0 12633.0 22.676666666666666 57 -gcp 867.0 12681.0 22.226666666666667 57 III-12_Talsen.jpg III-12_Talsen.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "849.0 1068.0\n12207.0 1011.0\n12279.0 12633.0\n867.0 12681.0" | \
  gdaltransform -tps -output_xy III-12_Talsen.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  III-12_Talsen.vrt III-12_Talsen.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES III-12_Talsen.cut.vrt III-12_Talsen.xyz