#!/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 4926.0 4956.0 27.08282 56.14519166666667 -gcp 41376.0 4770.0 27.124481666666668 56.14519166666667 -gcp 41454.0 37098.0 27.124481666666668 56.124361666666665 -gcp 4962.0 37218.0 27.08282 56.124361666666665 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004266-PLANSETE-96-d-7_4266.JPG LVVA-001679-0217-004266-PLANSETE-96-d-7_4266.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4926.0 4956.0\n41376.0 4770.0\n41454.0 37098.0\n4962.0 37218.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004266-PLANSETE-96-d-7_4266.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004266-PLANSETE-96-d-7_4266.vrt LVVA-001679-0217-004266-PLANSETE-96-d-7_4266.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004266-PLANSETE-96-d-7_4266.cut.vrt LVVA-001679-0217-004266-PLANSETE-96-d-7_4266.xyz