#!/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 4566.0 5184.0 21.375276666666668 56.98880166666667 -gcp 40224.0 5124.0 21.396108333333334 56.98880166666667 -gcp 40350.0 38892.0 21.396108333333334 56.978386666666665 -gcp 4698.0 38928.0 21.375276666666668 56.978386666666665 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000056-PLANSETE-004-c-2-III_0056.JPG LVVA-001679-0217-000056-PLANSETE-004-c-2-III_0056.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4566.0 5184.0\n40224.0 5124.0\n40350.0 38892.0\n4698.0 38928.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000056-PLANSETE-004-c-2-III_0056.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000056-PLANSETE-004-c-2-III_0056.vrt LVVA-001679-0217-000056-PLANSETE-004-c-2-III_0056.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000056-PLANSETE-004-c-2-III_0056.cut.vrt LVVA-001679-0217-000056-PLANSETE-004-c-2-III_0056.xyz