#!/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 26.285905838012695 57.4886156121117 -gcp 12711.0 0.0 26.402120590209964 57.50162228722224 -gcp 12711.0 8523.0 26.422634124755863 57.45944906757635 -gcp 0.0 8523.0 26.305346488952637 57.444164259867335 LVVA_F7404_US1_GV2073_0002.jpg LVVA_F7404_US1_GV2073_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"645.0 417.0\n12435.0 513.0\n12405.0 7632.0\n651.0 7506.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV2073_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV2073_0002.vrt LVVA_F7404_US1_GV2073_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV2073_0002.cut.vrt LVVA_F7404_US1_GV2073_0002.xyz