#!/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 25.190448760986 56.738461902442 -gcp 10371.0 0.0 25.287351608276 56.741333357923 -gcp 10371.0 8685.0 25.290012359619 56.698851105579 -gcp 0.0 8685.0 25.19474029541 56.695457992608 LVVA_F7404_US1_GV660_0002.jpg LVVA_F7404_US1_GV660_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"507.0 576.0\n9894.0 624.0\n9843.0 7746.0\n450.0 7680.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV660_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV660_0002.vrt LVVA_F7404_US1_GV660_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV660_0002.cut.vrt LVVA_F7404_US1_GV660_0002.xyz