#!/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 4752.0 6840.0 27.145311666666668 56.041043333333334 -gcp 41334.0 6702.0 27.166141666666668 56.041043333333334 -gcp 41382.0 39396.0 27.166141666666668 56.03062833333333 -gcp 4782.0 39552.0 27.145311666666668 56.03062833333333 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004296-PLANSETE-96-g-12-II_4296.JPG LVVA-001679-0217-004296-PLANSETE-96-g-12-II_4296.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4752.0 6840.0\n41334.0 6702.0\n41382.0 39396.0\n4782.0 39552.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004296-PLANSETE-96-g-12-II_4296.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004296-PLANSETE-96-g-12-II_4296.vrt LVVA-001679-0217-004296-PLANSETE-96-g-12-II_4296.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004296-PLANSETE-96-g-12-II_4296.cut.vrt LVVA-001679-0217-004296-PLANSETE-96-g-12-II_4296.xyz