#!/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 5130.0 6240.0 23.97908333333333 56.895066666666665 -gcp 40878.0 6354.0 23.999913333333332 56.895066666666665 -gcp 40872.0 40140.0 23.999913333333332 56.88465166666667 -gcp 5106.0 39990.0 23.97908333333333 56.88465166666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002320-PLANSETE-032-f-8-II_2320.JPG LVVA-001679-0217-002320-PLANSETE-032-f-8-II_2320.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5130.0 6240.0\n40878.0 6354.0\n40872.0 40140.0\n5106.0 39990.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002320-PLANSETE-032-f-8-II_2320.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002320-PLANSETE-032-f-8-II_2320.vrt LVVA-001679-0217-002320-PLANSETE-032-f-8-II_2320.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002320-PLANSETE-032-f-8-II_2320.cut.vrt LVVA-001679-0217-002320-PLANSETE-032-f-8-II_2320.xyz