#!/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 26.681842803955 56.926477332638 -gcp 10629.0 0.0 26.768016815186 56.940666873558 -gcp 10629.0 14490.0 26.797027587891 56.874871864342 -gcp 0.0 14490.0 26.713085174561 56.861783403499 LVVA_F7404_US1_GV1169_0002.jpg LVVA_F7404_US1_GV1169_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"675.0 7932.0\n579.0 801.0\n10185.0 660.0\n10059.0 13521.0\n5688.0 13581.0\n5490.0 7869.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1169_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1169_0002.vrt LVVA_F7404_US1_GV1169_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1169_0002.cut.vrt LVVA_F7404_US1_GV1169_0002.xyz