#!/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 6786.0 7440.0 25.603858333333335 57.342908333333334 -gcp 42036.0 7506.0 25.62468833333333 57.342908333333334 -gcp 41946.0 40356.0 25.62468833333333 57.33249333333333 -gcp 6678.0 40290.0 25.603858333333335 57.33249333333333 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003337-PLANSETE-064-d-15-IV_3337.JPG LVVA-001679-0217-003337-PLANSETE-064-d-15-IV_3337.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "6786.0 7440.0\n42036.0 7506.0\n41946.0 40356.0\n6678.0 40290.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003337-PLANSETE-064-d-15-IV_3337.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003337-PLANSETE-064-d-15-IV_3337.vrt LVVA-001679-0217-003337-PLANSETE-064-d-15-IV_3337.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003337-PLANSETE-064-d-15-IV_3337.cut.vrt LVVA-001679-0217-003337-PLANSETE-064-d-15-IV_3337.xyz