#!/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 5622.0 27.457768333333334 56.47847 -gcp 41196.0 5520.0 27.499428333333334 56.47847 -gcp 41232.0 38424.0 27.499428333333334 56.45764 -gcp 4926.0 38514.0 27.457768333333334 56.45764 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003706-PLANSETE-095-c-8_3706.JPG LVVA-001679-0217-003706-PLANSETE-095-c-8_3706.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4902.0 5622.0\n41196.0 5520.0\n41232.0 38424.0\n4926.0 38514.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003706-PLANSETE-095-c-8_3706.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003706-PLANSETE-095-c-8_3706.vrt LVVA-001679-0217-003706-PLANSETE-095-c-8_3706.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003706-PLANSETE-095-c-8_3706.cut.vrt LVVA-001679-0217-003706-PLANSETE-095-c-8_3706.xyz