#!/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 24.666066169739 57.512019681092 -gcp 6942.0 0.0 24.763312339783 57.515407991957 -gcp 6942.0 5772.0 24.772109985352 57.475512007328 -gcp 0.0 5772.0 24.673748016357 57.470573866559 LVVA_F7404_US1_GV287_0002.jpg LVVA_F7404_US1_GV287_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"255.0 255.0\n6702.0 297.0\n6675.0 5241.0\n246.0 5208.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV287_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV287_0002.vrt LVVA_F7404_US1_GV287_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV287_0002.cut.vrt LVVA_F7404_US1_GV287_0002.xyz