#!/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 6672.0 7686.0 27.52026 56.33266 -gcp 42978.0 7656.0 27.54109 56.33266 -gcp 42954.0 40056.0 27.54109 56.322245 -gcp 6648.0 40074.0 27.52026 56.322245 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004339-PLANSETE-104-g-1-II_4339.JPG LVVA-001679-0217-004339-PLANSETE-104-g-1-II_4339.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "6672.0 7686.0\n42978.0 7656.0\n42954.0 40056.0\n6648.0 40074.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004339-PLANSETE-104-g-1-II_4339.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004339-PLANSETE-104-g-1-II_4339.vrt LVVA-001679-0217-004339-PLANSETE-104-g-1-II_4339.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004339-PLANSETE-104-g-1-II_4339.cut.vrt LVVA-001679-0217-004339-PLANSETE-104-g-1-II_4339.xyz