#!/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 5052.0 7290.0 24.499845 56.291001666666666 -gcp 41334.0 7476.0 24.541505 56.291001666666666 -gcp 41154.0 40338.0 24.541505 56.27017166666667 -gcp 4842.0 40152.0 24.499845 56.27017166666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003231-PLANSETE-050-g-9_3231.JPG LVVA-001679-0217-003231-PLANSETE-050-g-9_3231.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5052.0 7290.0\n41334.0 7476.0\n41154.0 40338.0\n4842.0 40152.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003231-PLANSETE-050-g-9_3231.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003231-PLANSETE-050-g-9_3231.vrt LVVA-001679-0217-003231-PLANSETE-050-g-9_3231.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003231-PLANSETE-050-g-9_3231.cut.vrt LVVA-001679-0217-003231-PLANSETE-050-g-9_3231.xyz