#!/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 26.255135536194 56.984348913983 -gcp 15585.0 0.0 26.419706128048 57.004182837002 -gcp 15585.0 8916.0 26.436619779705 56.958569821914 -gcp 0.0 8916.0 26.272945404053 56.938606681145 LVVA_F7404_US1_GV2164_0002.jpg LVVA_F7404_US1_GV2164_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"600.0 687.0\n10522.5 702.0\n10440.0 8199.0\n645.0 8217.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV2164_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV2164_0002.vrt LVVA_F7404_US1_GV2164_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV2164_0002.cut.vrt LVVA_F7404_US1_GV2164_0002.xyz