#!/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 6972.0 24.208218333333335 57.11378 -gcp 40494.0 6906.0 24.229048333333335 57.11378 -gcp 40512.0 39450.0 24.229048333333335 57.103365 -gcp 4992.0 39492.0 24.208218333333335 57.103365 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002605-PLANSETE-038-e-10-III_2605.JPG LVVA-001679-0217-002605-PLANSETE-038-e-10-III_2605.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4998.0 6972.0\n40494.0 6906.0\n40512.0 39450.0\n4992.0 39492.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002605-PLANSETE-038-e-10-III_2605.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002605-PLANSETE-038-e-10-III_2605.vrt LVVA-001679-0217-002605-PLANSETE-038-e-10-III_2605.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002605-PLANSETE-038-e-10-III_2605.cut.vrt LVVA-001679-0217-002605-PLANSETE-038-e-10-III_2605.xyz