#!/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 4554.0 5880.0 20.958668333333332 56.31183166666667 -gcp 40848.0 6012.0 21.000328333333332 56.31183166666667 -gcp 40806.0 39762.0 21.000328333333332 56.291001666666666 -gcp 4524.0 39636.0 20.958668333333332 56.291001666666666 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000420-PLANSETE-0K6-g-5_0420.JPG LVVA-001679-0217-000420-PLANSETE-0K6-g-5_0420.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4554.0 5880.0\n40848.0 6012.0\n40806.0 39762.0\n4524.0 39636.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000420-PLANSETE-0K6-g-5_0420.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000420-PLANSETE-0K6-g-5_0420.vrt LVVA-001679-0217-000420-PLANSETE-0K6-g-5_0420.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000420-PLANSETE-0K6-g-5_0420.cut.vrt LVVA-001679-0217-000420-PLANSETE-0K6-g-5_0420.xyz