#!/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 4902.0 6252.0 23.749948333333332 56.43681 -gcp 41070.0 6366.0 23.791608333333333 56.43681 -gcp 41082.0 40122.0 23.791608333333333 56.41598 -gcp 4896.0 40008.0 23.749948333333332 56.41598 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002535-PLANSETE-034-b-15_2535.JPG LVVA-001679-0217-002535-PLANSETE-034-b-15_2535.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4902.0 6252.0\n41070.0 6366.0\n41082.0 40122.0\n4896.0 40008.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002535-PLANSETE-034-b-15_2535.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002535-PLANSETE-034-b-15_2535.vrt LVVA-001679-0217-002535-PLANSETE-034-b-15_2535.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002535-PLANSETE-034-b-15_2535.cut.vrt LVVA-001679-0217-002535-PLANSETE-034-b-15_2535.xyz