#!/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 5094.0 6888.0 24.458183333333334 56.41598 -gcp 41220.0 6894.0 24.499845 56.41598 -gcp 41244.0 39720.0 24.499845 56.39515 -gcp 5082.0 39732.0 24.458183333333334 56.39515 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002921-PLANSETE-041-f-4_2921.JPG LVVA-001679-0217-002921-PLANSETE-041-f-4_2921.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5094.0 6888.0\n41220.0 6894.0\n41244.0 39720.0\n5082.0 39732.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002921-PLANSETE-041-f-4_2921.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002921-PLANSETE-041-f-4_2921.vrt LVVA-001679-0217-002921-PLANSETE-041-f-4_2921.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002921-PLANSETE-041-f-4_2921.cut.vrt LVVA-001679-0217-002921-PLANSETE-041-f-4_2921.xyz