#!/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 6246.0 27.54109 56.10353166666667 -gcp 41262.0 6270.0 27.58275 56.10353166666667 -gcp 41202.0 39036.0 27.58275 56.082701666666665 -gcp 4584.0 38988.0 27.54109 56.082701666666665 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004351-PLANSETE-105-d-14_4351.JPG LVVA-001679-0217-004351-PLANSETE-105-d-14_4351.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4674.0 6246.0\n41262.0 6270.0\n41202.0 39036.0\n4584.0 38988.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004351-PLANSETE-105-d-14_4351.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004351-PLANSETE-105-d-14_4351.vrt LVVA-001679-0217-004351-PLANSETE-105-d-14_4351.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004351-PLANSETE-105-d-14_4351.cut.vrt LVVA-001679-0217-004351-PLANSETE-105-d-14_4351.xyz