#!/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 25.205640792847 57.330135236827 -gcp 20565.0 0.0 25.408973693848 57.342642532332 -gcp 20565.0 15573.0 25.423393249512 57.264100345555 -gcp 0.0 15573.0 25.215339660645 57.251473452855 LVVA_F7404_US1_GV1501_0002.jpg LVVA_F7404_US1_GV1501_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1101.0 588.0\n20022.0 813.0\n19938.0 7986.0\n15348.0 7881.0\n15336.0 14994.0\n969.0 15009.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1501_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1501_0002.vrt LVVA_F7404_US1_GV1501_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1501_0002.cut.vrt LVVA_F7404_US1_GV1501_0002.xyz