#!/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 26.777372360229 57.421386824358 -gcp 8859.0 0.0 26.781406402588 57.374308624468 -gcp 8859.0 19047.0 26.587772369385 57.373012887981 -gcp 0.0 19047.0 26.5846824646 57.420924660705 LVVA_F7404_US1_GV1806_0002.jpg LVVA_F7404_US1_GV1806_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1114.5 12157.5\n786.0 10497.0\n864.0 10369.5\n985.5 10234.5\n1084.5 10078.5\n1143.0 9951.0\n1080.75 9464.25\n1104.0 9419.25\n768.75 7038.0\n1129.5 7527.0\n1116.0 777.0\n8055.0 786.0\n8044.5 4839.0\n8064.0 8167.5\n8078.25 8172.75\n8089.125 8160.375\n8134.125 8096.25\n8179.5 8131.5\n8152.5 8199.75\n8190.0 8222.25\n8211.75 8259.0\n8271.75 8289.0\n8315.25 8258.25\n8378.25 8241.0\n8406.0 8265.75\n8427.0 8305.5\n8382.0 8301.75\n8349.0 8329.5\n8336.25 8355.0\n8352.0 8396.25\n8337.75 8429.25\n8301.75 8442.75\n8304.0 9399.0\n8304.75 9963.0\n8013.0 10326.0\n8031.0 18072.0\n1113.0 18048.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1806_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1806_0002.vrt LVVA_F7404_US1_GV1806_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1806_0002.cut.vrt LVVA_F7404_US1_GV1806_0002.xyz