#!/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 25.602436065674 57.556918044862 -gcp 8886.0 0.0 25.708351135254 57.564376548519 -gcp 8886.0 11280.0 25.721912384033 57.498486349811 -gcp 0.0 11280.0 25.620546340942 57.489307573221 LVVA_F7404_US1_GV637_0002.jpg LVVA_F7404_US1_GV637_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"537.0 474.0\n8304.0 486.0\n8316.0 10221.0\n552.0 10206.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV637_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV637_0002.vrt LVVA_F7404_US1_GV637_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV637_0002.cut.vrt LVVA_F7404_US1_GV637_0002.xyz