#!/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 4770.0 6810.0 27.666073333333333 56.124361666666665 -gcp 41400.0 6738.0 27.707733333333334 56.124361666666665 -gcp 41424.0 39618.0 27.707733333333334 56.10353166666667 -gcp 4776.0 39678.0 27.666073333333333 56.10353166666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004052-PLANSETE-105-e-9_4052.JPG LVVA-001679-0217-004052-PLANSETE-105-e-9_4052.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4770.0 6810.0\n41400.0 6738.0\n41424.0 39618.0\n4776.0 39678.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004052-PLANSETE-105-e-9_4052.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004052-PLANSETE-105-e-9_4052.vrt LVVA-001679-0217-004052-PLANSETE-105-e-9_4052.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004052-PLANSETE-105-e-9_4052.cut.vrt LVVA-001679-0217-004052-PLANSETE-105-e-9_4052.xyz