#!/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 4674.0 6084.0 22.45846 56.41598 -gcp 40812.0 6018.0 22.500121666666665 56.41598 -gcp 40986.0 39768.0 22.500121666666665 56.39515 -gcp 4830.0 39816.0 22.45846 56.39515 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-001197-PLANSETE-020-f-4_1197.JPG LVVA-001679-0217-001197-PLANSETE-020-f-4_1197.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4674.0 6084.0\n40812.0 6018.0\n40986.0 39768.0\n4830.0 39816.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-001197-PLANSETE-020-f-4_1197.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-001197-PLANSETE-020-f-4_1197.vrt LVVA-001679-0217-001197-PLANSETE-020-f-4_1197.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-001197-PLANSETE-020-f-4_1197.cut.vrt LVVA-001679-0217-001197-PLANSETE-020-f-4_1197.xyz