#!/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 25.655221939087 57.098074369224 -gcp 14697.0 0.0 25.782594680786 57.110707173442 -gcp 14697.0 8793.0 25.794868469238 57.071116213123 -gcp 0.0 8793.0 25.669298171997 57.058376567468 LVVA_F7404_US1_GV896_0002.jpg LVVA_F7404_US1_GV896_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"477.0 573.0\n14133.0 714.0\n14106.0 7806.0\n306.0 7692.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV896_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV896_0002.vrt LVVA_F7404_US1_GV896_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV896_0002.cut.vrt LVVA_F7404_US1_GV896_0002.xyz