#!/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 4872.0 5376.0 21.375276666666668 57.082535 -gcp 40407.0 5556.0 21.416938333333334 57.082535 -gcp 40365.0 39291.0 21.416938333333334 57.061706666666666 -gcp 4830.0 39114.0 21.375276666666668 57.061706666666666 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000028-PLANSETE-003-i-2_0028.JPG LVVA-001679-0217-000028-PLANSETE-003-i-2_0028.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4872.0 5376.0\n40407.0 5556.0\n40365.0 39291.0\n4830.0 39114.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000028-PLANSETE-003-i-2_0028.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000028-PLANSETE-003-i-2_0028.vrt LVVA-001679-0217-000028-PLANSETE-003-i-2_0028.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000028-PLANSETE-003-i-2_0028.cut.vrt LVVA-001679-0217-000028-PLANSETE-003-i-2_0028.xyz