#!/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 26.810932159424 57.508538843629 -gcp 10440.0 0.0 26.92663192749 57.511950528614 -gcp 10440.0 8676.0 26.927848683954 57.465773639016 -gcp 0.0 8676.0 26.814193725586 57.462819177454 LVVA_F7404_US1_GV1814_0002.jpg LVVA_F7404_US1_GV1814_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"606.0 453.0\n6015.0 507.0\n7104.0 2160.0\n7110.0 4434.0\n7089.0 7572.0\n591.0 7494.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1814_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1814_0002.vrt LVVA_F7404_US1_GV1814_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1814_0002.cut.vrt LVVA_F7404_US1_GV1814_0002.xyz