#!/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 4392.0 5844.0 21.04199 56.31183166666667 -gcp 40674.0 5916.0 21.08365 56.31183166666667 -gcp 40722.0 39660.0 21.08365 56.291001666666666 -gcp 4428.0 39570.0 21.04199 56.291001666666666 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000424-PLANSETE-006-g-6_0424.JPG LVVA-001679-0217-000424-PLANSETE-006-g-6_0424.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4392.0 5844.0\n40674.0 5916.0\n40722.0 39660.0\n4428.0 39570.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000424-PLANSETE-006-g-6_0424.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000424-PLANSETE-006-g-6_0424.vrt LVVA-001679-0217-000424-PLANSETE-006-g-6_0424.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000424-PLANSETE-006-g-6_0424.cut.vrt LVVA-001679-0217-000424-PLANSETE-006-g-6_0424.xyz