#!/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 26.999974250793 57.501714516597 -gcp 10629.0 0.0 27.097134590149 57.510982380159 -gcp 10629.0 8859.0 27.111768722534 57.465773538744 -gcp 0.0 8859.0 27.014780044556 57.457232935605 LVVA_F7404_US1_GV1801_0002.jpg LVVA_F7404_US1_GV1801_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"564.0 573.0\n9999.0 633.0\n10020.0 7653.0\n579.0 7686.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1801_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1801_0002.vrt LVVA_F7404_US1_GV1801_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1801_0002.cut.vrt LVVA_F7404_US1_GV1801_0002.xyz