#!/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 4950.0 7332.0 25.091428333333333 56.628445 -gcp 40944.0 7362.0 25.099761666666666 56.628445 -gcp 40896.0 40206.0 25.099761666666666 56.624278333333336 -gcp 4896.0 40182.0 25.091428333333333 56.624278333333336 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003275-PLANSETE-058-d-7-XXII_3275.JPG LVVA-001679-0217-003275-PLANSETE-058-d-7-XXII_3275.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4950.0 7332.0\n40944.0 7362.0\n40896.0 40206.0\n4896.0 40182.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003275-PLANSETE-058-d-7-XXII_3275.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003275-PLANSETE-058-d-7-XXII_3275.vrt LVVA-001679-0217-003275-PLANSETE-058-d-7-XXII_3275.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003275-PLANSETE-058-d-7-XXII_3275.cut.vrt LVVA-001679-0217-003275-PLANSETE-058-d-7-XXII_3275.xyz