#!/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 4428.0 5718.0 21.125311666666665 56.47847 -gcp 40512.0 5820.0 21.166973333333335 56.47847 -gcp 40536.0 39576.0 21.166973333333335 56.45764 -gcp 4458.0 39444.0 21.125311666666665 56.45764 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000295-PLANSETE-006-a-8_0295.JPG LVVA-001679-0217-000295-PLANSETE-006-a-8_0295.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4428.0 5718.0\n40512.0 5820.0\n40536.0 39576.0\n4458.0 39444.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000295-PLANSETE-006-a-8_0295.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000295-PLANSETE-006-a-8_0295.vrt LVVA-001679-0217-000295-PLANSETE-006-a-8_0295.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000295-PLANSETE-006-a-8_0295.cut.vrt LVVA-001679-0217-000295-PLANSETE-006-a-8_0295.xyz