#!/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 5106.0 6120.0 22.583443333333335 57.249175 -gcp 40518.0 6228.0 22.625103333333332 57.249175 -gcp 40494.0 39972.0 22.625103333333332 57.228345 -gcp 5076.0 39870.0 22.583443333333335 57.228345 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-001340-PLANSETE-023-a-3_1340.JPG LVVA-001679-0217-001340-PLANSETE-023-a-3_1340.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5106.0 6120.0\n40518.0 6228.0\n40494.0 39972.0\n5076.0 39870.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-001340-PLANSETE-023-a-3_1340.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-001340-PLANSETE-023-a-3_1340.vrt LVVA-001679-0217-001340-PLANSETE-023-a-3_1340.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-001340-PLANSETE-023-a-3_1340.cut.vrt LVVA-001679-0217-001340-PLANSETE-023-a-3_1340.xyz