#!/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 25.872546869913 57.158333814487 -gcp 10326.0 0.0 25.97686251619 57.166621913629 -gcp 10326.0 9303.0 25.992021560669 57.114808412506 -gcp 0.0 9303.0 25.886707305908 57.106605480356 LVVA_F7404_US2_GV56_0002.jpg LVVA_F7404_US2_GV56_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"357.0 495.0\n4980.0 500.25\n9549.0 477.0\n9690.0 7218.0\n9330.0 7242.0\n7725.0 7341.0\n5112.0 7365.0\n408.0 7405.5\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US2_GV56_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US2_GV56_0002.vrt LVVA_F7404_US2_GV56_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US2_GV56_0002.cut.vrt LVVA_F7404_US2_GV56_0002.xyz