#!/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 25.062475204468 57.049460882005 -gcp 10515.0 0.0 25.14684677124 57.052355213524 -gcp 10515.0 11442.0 25.157232284546 56.983717562164 -gcp 0.0 11442.0 25.068311691284 56.981472668988 LVVA_F7404_US1_GV1704_0002.jpg LVVA_F7404_US1_GV1704_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"585.0 351.0\n9948.0 435.0\n9909.0 9990.0\n5982.0 10164.0\n5875.5 7302.0\n582.0 7329.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1704_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1704_0002.vrt LVVA_F7404_US1_GV1704_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1704_0002.cut.vrt LVVA_F7404_US1_GV1704_0002.xyz