#!/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 26.490955352783 57.282243923178 -gcp 7023.0 0.0 26.589660644531 57.291799348076 -gcp 7023.0 5763.0 26.601505279541 57.250405539219 -gcp 0.0 5763.0 26.502885818481 57.2402820405 LVVA_F7404_US1_GV476_0002.jpg LVVA_F7404_US1_GV476_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"288.0 300.0\n6690.0 360.0\n6717.0 5184.0\n240.0 5154.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV476_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV476_0002.vrt LVVA_F7404_US1_GV476_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV476_0002.cut.vrt LVVA_F7404_US1_GV476_0002.xyz