#!/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 6792.0 8604.0 27.499428333333334 56.31183166666667 -gcp 43068.0 8514.0 27.54109 56.31183166666667 -gcp 43116.0 40926.0 27.54109 56.291001666666666 -gcp 6822.0 41010.0 27.499428333333334 56.291001666666666 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004371-PLANSETE-104-g-5_4371.JPG LVVA-001679-0217-004371-PLANSETE-104-g-5_4371.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "6792.0 8604.0\n43068.0 8514.0\n43116.0 40926.0\n6822.0 41010.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004371-PLANSETE-104-g-5_4371.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004371-PLANSETE-104-g-5_4371.vrt LVVA-001679-0217-004371-PLANSETE-104-g-5_4371.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004371-PLANSETE-104-g-5_4371.cut.vrt LVVA-001679-0217-004371-PLANSETE-104-g-5_4371.xyz