#!/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 5040.0 6330.0 27.041158333333332 56.72842833333333 -gcp 41082.0 6246.0 27.08282 56.72842833333333 -gcp 41112.0 39138.0 27.08282 56.70759833333334 -gcp 5034.0 39216.0 27.041158333333332 56.70759833333334 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003647-PLANSETE-094-a-6_3647.JPG LVVA-001679-0217-003647-PLANSETE-094-a-6_3647.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5040.0 6330.0\n41082.0 6246.0\n41112.0 39138.0\n5034.0 39216.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003647-PLANSETE-094-a-6_3647.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003647-PLANSETE-094-a-6_3647.vrt LVVA-001679-0217-003647-PLANSETE-094-a-6_3647.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003647-PLANSETE-094-a-6_3647.cut.vrt LVVA-001679-0217-003647-PLANSETE-094-a-6_3647.xyz