#!/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 5856.0 21.583581666666667 57.436643333333336 -gcp 40122.0 5904.0 21.604411666666667 57.436643333333336 -gcp 40176.0 39696.0 21.604411666666667 57.426228333333334 -gcp 4938.0 39618.0 21.583581666666667 57.426228333333334 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000571-PLANSETE-009-a-15-I_0571.JPG LVVA-001679-0217-000571-PLANSETE-009-a-15-I_0571.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4902.0 5856.0\n40122.0 5904.0\n40176.0 39696.0\n4938.0 39618.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000571-PLANSETE-009-a-15-I_0571.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000571-PLANSETE-009-a-15-I_0571.vrt LVVA-001679-0217-000571-PLANSETE-009-a-15-I_0571.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000571-PLANSETE-009-a-15-I_0571.cut.vrt LVVA-001679-0217-000571-PLANSETE-009-a-15-I_0571.xyz