#!/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 4974.0 6192.0 23.250016666666667 56.83257666666667 -gcp 40800.0 6306.0 23.291678333333333 56.83257666666667 -gcp 40794.0 40074.0 23.291678333333333 56.811748333333334 -gcp 4962.0 39936.0 23.250016666666667 56.811748333333334 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002018-PLANSETE-029-h-3_2018.JPG LVVA-001679-0217-002018-PLANSETE-029-h-3_2018.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4974.0 6192.0\n40800.0 6306.0\n40794.0 40074.0\n4962.0 39936.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002018-PLANSETE-029-h-3_2018.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002018-PLANSETE-029-h-3_2018.vrt LVVA-001679-0217-002018-PLANSETE-029-h-3_2018.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002018-PLANSETE-029-h-3_2018.cut.vrt LVVA-001679-0217-002018-PLANSETE-029-h-3_2018.xyz