#!/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 5118.0 6636.0 27.332785 56.74925833333333 -gcp 41142.0 6588.0 27.374446666666667 56.74925833333333 -gcp 41142.0 39426.0 27.374446666666667 56.72842833333333 -gcp 5082.0 39474.0 27.332785 56.72842833333333 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003664-PLANSETE-094-c-1_3664.JPG LVVA-001679-0217-003664-PLANSETE-094-c-1_3664.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5118.0 6636.0\n41142.0 6588.0\n41142.0 39426.0\n5082.0 39474.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003664-PLANSETE-094-c-1_3664.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003664-PLANSETE-094-c-1_3664.vrt LVVA-001679-0217-003664-PLANSETE-094-c-1_3664.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003664-PLANSETE-094-c-1_3664.cut.vrt LVVA-001679-0217-003664-PLANSETE-094-c-1_3664.xyz