#!/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 25.322456359863 57.998001352797 -gcp 15060.0 0.0 25.468883514404 58.012462939403 -gcp 15060.0 8859.0 25.486736297607 57.97006213206 -gcp 0.0 8859.0 25.336360931396 57.95521909576 LVVA_F7404_US1_GV1228_0002.jpg LVVA_F7404_US1_GV1228_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"666.0 666.0\n3771.0 660.0\n7593.0 655.5\n11421.0 666.0\n14538.0 639.0\n14475.0 7863.0\n6993.0 7872.0\n753.0 7788.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1228_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1228_0002.vrt LVVA_F7404_US1_GV1228_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1228_0002.cut.vrt LVVA_F7404_US1_GV1228_0002.xyz