#!/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 4614.0 5154.0 21.354446666666668 56.99921666666667 -gcp 40218.0 5208.0 21.375276666666668 56.99921666666667 -gcp 40260.0 38958.0 21.375276666666668 56.98880166666667 -gcp 4620.0 38874.0 21.354446666666668 56.98880166666667 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000052-PLANSETE-004-c-1-II_0052.JPG LVVA-001679-0217-000052-PLANSETE-004-c-1-II_0052.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4614.0 5154.0\n40218.0 5208.0\n40260.0 38958.0\n4620.0 38874.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000052-PLANSETE-004-c-1-II_0052.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000052-PLANSETE-004-c-1-II_0052.vrt LVVA-001679-0217-000052-PLANSETE-004-c-1-II_0052.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000052-PLANSETE-004-c-1-II_0052.cut.vrt LVVA-001679-0217-000052-PLANSETE-004-c-1-II_0052.xyz