#!/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 26.25418344 57.14966042 -gcp 21537.0 0.0 26.25829531 57.23330138 -gcp 21537.0 23466.0 26.42907957 57.23158197 -gcp 0.0 23466.0 26.42472226 57.14662449 GX10802/GX_10802_SK_frame_377.jpg GX_10802_SK_frame_377.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1344.0 2448.0\n1416.0 19176.0\n20976.0 19128.0\n21096.0 2016.0" | \
  gdaltransform -tps -output_xy GX_10802_SK_frame_377.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10802_SK_frame_377.vrt GX_10802_SK_frame_377.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10802_SK_frame_377.cut.vrt GX_10802_SK_frame_377.xyz