#!/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 24.723443984985 57.58655886616 -gcp 7059.0 0.0 24.823780059814 57.597414988174 -gcp 7059.0 10488.0 24.853649139404 57.520293981356 -gcp 0.0 10488.0 24.752197265625 57.509368742311 LVVA_F7404_US1_GV331_0002.jpg LVVA_F7404_US1_GV331_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"396.0 411.0\n6690.0 438.0\n6653.25 3163.5\n6789.0 3279.0\n6634.5 3580.5\n6645.0 3667.5\n6714.0 3759.0\n6768.0 3969.0\n6640.5 4102.5\n6624.0 5718.0\n6654.75 5809.5\n6648.0 5947.5\n6726.0 5949.75\n6745.5 6001.5\n6684.75 6203.25\n6627.75 6291.0\n6636.0 9849.0\n324.0 9777.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV331_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV331_0002.vrt LVVA_F7404_US1_GV331_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV331_0002.cut.vrt LVVA_F7404_US1_GV331_0002.xyz