#!/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 5016.0 5628.0 27.457768333333334 56.54096 -gcp 41256.0 5574.0 27.499428333333334 56.54096 -gcp 41250.0 38490.0 27.499428333333334 56.52013 -gcp 5004.0 38514.0 27.457768333333334 56.52013 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003696-PLANSETE-094-i-12_3696.JPG LVVA-001679-0217-003696-PLANSETE-094-i-12_3696.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5016.0 5628.0\n41256.0 5574.0\n41250.0 38490.0\n5004.0 38514.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003696-PLANSETE-094-i-12_3696.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003696-PLANSETE-094-i-12_3696.vrt LVVA-001679-0217-003696-PLANSETE-094-i-12_3696.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003696-PLANSETE-094-i-12_3696.cut.vrt LVVA-001679-0217-003696-PLANSETE-094-i-12_3696.xyz