#!/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 5790.0 7020.0 24.041575 57.051291666666664 -gcp 41604.0 7440.0 24.062405 57.051291666666664 -gcp 41190.0 40182.0 24.062405 57.04087666666667 -gcp 5562.0 39786.0 24.041575 57.04087666666667 LVVA_F1679_US217_GV6980-6997_GV7004/LVVA-001679-0217-006992-PLANSETE-38-g-6-III_0008.JPG LVVA-001679-0217-006992-PLANSETE-38-g-6-III_0008.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5790.0 7020.0\n41604.0 7440.0\n41190.0 40182.0\n5562.0 39786.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-006992-PLANSETE-38-g-6-III_0008.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-006992-PLANSETE-38-g-6-III_0008.vrt LVVA-001679-0217-006992-PLANSETE-38-g-6-III_0008.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-006992-PLANSETE-38-g-6-III_0008.cut.vrt LVVA-001679-0217-006992-PLANSETE-38-g-6-III_0008.xyz