#!/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 4824.0 6060.0 21.875208333333333 56.37432 -gcp 41016.0 6078.0 21.916868333333333 56.37432 -gcp 41106.0 39822.0 21.916868333333333 56.35349 -gcp 4896.0 39798.0 21.875208333333333 56.35349 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000987-PLANSETE-013-f-10_0987.JPG LVVA-001679-0217-000987-PLANSETE-013-f-10_0987.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4824.0 6060.0\n41016.0 6078.0\n41106.0 39822.0\n4896.0 39798.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000987-PLANSETE-013-f-10_0987.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000987-PLANSETE-013-f-10_0987.vrt LVVA-001679-0217-000987-PLANSETE-013-f-10_0987.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000987-PLANSETE-013-f-10_0987.cut.vrt LVVA-001679-0217-000987-PLANSETE-013-f-10_0987.xyz