#!/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 24.218328019574 56.860549003028 -gcp 14532.0 0.0 24.355566244177 56.866141550284 -gcp 14532.0 8538.0 24.366841842314 56.819854801259 -gcp 0.0 8538.0 24.229603617711 56.814262254004 LVVA_F7404_US1_GV83_0002.jpg LVVA_F7404_US1_GV83_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"504.0 453.0\n13980.0 510.0\n13977.0 7647.0\n459.0 7569.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV83_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV83_0002.vrt LVVA_F7404_US1_GV83_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV83_0002.cut.vrt LVVA_F7404_US1_GV83_0002.xyz