#!/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 26.040945053101 56.679147932552 -gcp 14985.0 0.0 26.189346313477 56.696447682154 -gcp 14985.0 8304.0 26.206426620483 56.65391471043 -gcp 0.0 8304.0 26.059141159058 56.635320934284 LVVA_F7404_US1_GV1658_0002.jpg LVVA_F7404_US1_GV1658_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"765.0 444.0\n4752.0 555.0\n7467.0 534.0\n14166.0 546.0\n14214.0 7419.0\n9588.0 7378.5\n9502.5 7369.5\n4753.5 7317.0\n711.0 7359.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1658_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1658_0002.vrt LVVA_F7404_US1_GV1658_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1658_0002.cut.vrt LVVA_F7404_US1_GV1658_0002.xyz