#!/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 25.600719451904 57.031809915659 -gcp 14574.0 0.0 25.703458786011 57.041663737833 -gcp 14574.0 8622.0 25.714015960693 57.002139278898 -gcp 0.0 8622.0 25.613508224487 56.992041192794 LVVA_F7404_US1_GV1587_0002.jpg LVVA_F7404_US1_GV1587_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"561.0 477.0\n9825.0 492.0\n9846.0 7518.0\n2964.0 7482.0\n2895.0 7770.0\n2175.0 7764.0\n2079.0 7488.0\n528.0 7494.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1587_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1587_0002.vrt LVVA_F7404_US1_GV1587_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1587_0002.cut.vrt LVVA_F7404_US1_GV1587_0002.xyz