#!/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 4998.0 6618.0 27.291125 55.957723333333334 -gcp 41700.0 6702.0 27.332785 55.957723333333334 -gcp 41580.0 39438.0 27.332785 55.93689333333333 -gcp 4842.0 39318.0 27.291125 55.93689333333333 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004305-PLANSETE-97-b-12_4305.JPG LVVA-001679-0217-004305-PLANSETE-97-b-12_4305.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4998.0 6618.0\n41700.0 6702.0\n41580.0 39438.0\n4842.0 39318.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004305-PLANSETE-97-b-12_4305.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004305-PLANSETE-97-b-12_4305.vrt LVVA-001679-0217-004305-PLANSETE-97-b-12_4305.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004305-PLANSETE-97-b-12_4305.cut.vrt LVVA-001679-0217-004305-PLANSETE-97-b-12_4305.xyz