#!/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 24.737520217896 56.743828050947 -gcp 10554.0 0.0 24.83922958374 56.745757794196 -gcp 10554.0 8769.0 24.842920303345 56.703186304822 -gcp 0.0 8769.0 24.741983413696 56.701442860811 LVVA_F7404_US1_GV705_0002.jpg LVVA_F7404_US1_GV705_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"342.0 390.0\n10152.0 420.0\n10134.0 7866.0\n426.0 7851.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV705_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV705_0002.vrt LVVA_F7404_US1_GV705_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV705_0002.cut.vrt LVVA_F7404_US1_GV705_0002.xyz