#!/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 909.0 1350.0 23.126666666666665 57 -gcp 10614.0 1317.0 23.576666666666668 57 -gcp 10677.0 11178.0 23.576666666666668 56.75 -gcp 909.0 11223.0 23.126666666666665 56.75 Bruno/IV-14_Tuckum-1.jpg IV-14_Tuckum-1.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "909.0 1350.0\n10614.0 1317.0\n10677.0 11178.0\n909.0 11223.0" | \
  gdaltransform -tps -output_xy IV-14_Tuckum-1.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  IV-14_Tuckum-1.vrt IV-14_Tuckum-1.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES IV-14_Tuckum-1.cut.vrt IV-14_Tuckum-1.xyz