#!/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 24.724216461182 57.723586052427 -gcp 15900.0 0.0 24.875020980835 57.733255725992 -gcp 15900.0 19815.0 24.894332885742 57.633915614767 -gcp 0.0 19815.0 24.744472503662 57.624678997369 LVVA_F7404_US1_GV1897_0004.jpg LVVA_F7404_US1_GV1897_0004.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"10968.0 4596.0\n6342.0 4524.0\n6405.0 975.0\n14865.0 1167.0\n14866.5 11593.5\n14895.0 18657.0\n10926.0 18696.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1897_0004.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1897_0004.vrt LVVA_F7404_US1_GV1897_0004.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1897_0004.cut.vrt LVVA_F7404_US1_GV1897_0004.xyz