#!/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 4632.0 6102.0 21.625241666666668 56.770088333333334 -gcp 40500.0 6270.0 21.666903333333334 56.770088333333334 -gcp 40446.0 40020.0 21.666903333333334 56.74925833333333 -gcp 4590.0 39870.0 21.625241666666668 56.74925833333333 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000731-PLANSETE-011-g-16_0731.JPG LVVA-001679-0217-000731-PLANSETE-011-g-16_0731.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4632.0 6102.0\n40500.0 6270.0\n40446.0 40020.0\n4590.0 39870.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000731-PLANSETE-011-g-16_0731.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000731-PLANSETE-011-g-16_0731.vrt LVVA-001679-0217-000731-PLANSETE-011-g-16_0731.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000731-PLANSETE-011-g-16_0731.cut.vrt LVVA-001679-0217-000731-PLANSETE-011-g-16_0731.xyz