#!/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 24.520969390869 57.771954356275 -gcp 10080.0 0.0 24.633407592773 57.777446660665 -gcp 10080.0 18303.0 24.645166397095 57.687955537758 -gcp 0.0 18303.0 24.534015655518 57.682862602028 LVVA_F7404_US1_GV1200_0002.jpg LVVA_F7404_US1_GV1200_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"4933.5 7312.5\n811.5 7206.75\n927.0 717.0\n9552.0 708.0\n9618.0 14961.0\n9129.0 14961.0\n9129.0 17133.0\n4971.0 17158.5\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1200_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1200_0002.vrt LVVA_F7404_US1_GV1200_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1200_0002.cut.vrt LVVA_F7404_US1_GV1200_0002.xyz