#!/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 4872.0 5850.0 21.708565 57.56162333333333 -gcp 39972.0 5832.0 21.750225 57.56162333333333 -gcp 40086.0 39612.0 21.750225 57.54079333333333 -gcp 4974.0 39630.0 21.708565 57.54079333333333 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000549-PLANSETE-008-h-6_0549.JPG LVVA-001679-0217-000549-PLANSETE-008-h-6_0549.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4872.0 5850.0\n39972.0 5832.0\n40086.0 39612.0\n4974.0 39630.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000549-PLANSETE-008-h-6_0549.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000549-PLANSETE-008-h-6_0549.vrt LVVA-001679-0217-000549-PLANSETE-008-h-6_0549.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000549-PLANSETE-008-h-6_0549.cut.vrt LVVA-001679-0217-000549-PLANSETE-008-h-6_0549.xyz