#!/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 4878.0 6942.0 27.54109 56.02021333333333 -gcp 41592.0 6864.0 27.58275 56.02021333333333 -gcp 41628.0 39738.0 27.58275 55.999383333333334 -gcp 4890.0 39804.0 27.54109 55.999383333333334 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004084-PLANSETE-105-g-14_4084.JPG LVVA-001679-0217-004084-PLANSETE-105-g-14_4084.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4878.0 6942.0\n41592.0 6864.0\n41628.0 39738.0\n4890.0 39804.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004084-PLANSETE-105-g-14_4084.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004084-PLANSETE-105-g-14_4084.vrt LVVA-001679-0217-004084-PLANSETE-105-g-14_4084.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004084-PLANSETE-105-g-14_4084.cut.vrt LVVA-001679-0217-004084-PLANSETE-105-g-14_4084.xyz