#!/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 25.6662940979 56.840334699901 -gcp 10692.0 0.0 25.796756744385 56.847657740091 -gcp 10692.0 10815.0 25.80885887146 56.783391490393 -gcp 0.0 10815.0 25.675563812256 56.776949396689 LVVA_F7404_US1_GV1667_0002.jpg LVVA_F7404_US1_GV1667_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"510.0 354.0\n4539.0 261.0\n4599.0 2688.0\n9927.0 2751.0\n9885.0 9657.0\n621.0 9558.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1667_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1667_0002.vrt LVVA_F7404_US1_GV1667_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1667_0002.cut.vrt LVVA_F7404_US1_GV1667_0002.xyz