#!/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 24.45384979248 56.839254899708 -gcp 10605.0 0.0 24.552383422852 56.846437332885 -gcp 10605.0 8865.0 24.565858840942 56.800549334495 -gcp 0.0 8865.0 24.46732521057 56.793366901318 LVVA_F7404_US1_GV64_0002.jpg LVVA_F7404_US1_GV64_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"624.0 531.0\n10086.0 621.0\n10053.0 7851.0\n588.0 7773.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV64_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV64_0002.vrt LVVA_F7404_US1_GV64_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV64_0002.cut.vrt LVVA_F7404_US1_GV64_0002.xyz