#!/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 25.147790908813 57.461803560609 -gcp 9990.0 0.0 25.284004211426 57.476342657022 -gcp 9990.0 10272.0 25.319538116455 57.39586666236 -gcp 0.0 10272.0 25.176887512207 57.380971689111 LVVA_F7404_US1_GV235_0002.jpg LVVA_F7404_US1_GV235_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"390.0 465.0\n3282.75 460.5\n3312.0 2502.75\n9579.0 2652.0\n9543.0 9561.0\n7006.5 9579.0\n6975.0 7404.75\n5571.0 7369.5\n5188.5 7602.0\n4593.0 7359.0\n408.0 7308.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV235_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV235_0002.vrt LVVA_F7404_US1_GV235_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV235_0002.cut.vrt LVVA_F7404_US1_GV235_0002.xyz