#!/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 0.0 0.0 26.198444366455 56.835592736703 -gcp 14628.0 0.0 26.339292526245 56.850286174296 -gcp 14628.0 11784.0 26.367788314819 56.791101739393 -gcp 0.0 11784.0 26.225566864014 56.775867768876 LVVA_F7404_US1_GV1613_0002.jpg LVVA_F7404_US1_GV1613_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"624.0 654.0\n10008.0 771.0\n9858.0 6750.0\n7296.0 6672.0\n6642.0 5748.0\n4275.0 5584.5\n4150.5 5164.5\n3031.5 5134.5\n3044.25 3824.25\n2173.5 3790.5\n2179.5 2898.0\n613.5 2875.5\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1613_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1613_0002.vrt LVVA_F7404_US1_GV1613_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1613_0002.cut.vrt LVVA_F7404_US1_GV1613_0002.xyz