#!/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 24.23554905 56.9618995 -gcp 21600.0 0.0 24.19815619 56.98502345 -gcp 21600.0 21168.0 24.24093398 57.0061559 -gcp 0.0 21168.0 24.27904482 56.98174894 GX4190/GX_4190_SD_frame_8.jpg GX_4190_SD_frame_8.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "768.0 2664.0533629794327\n648.0 18695.98665925514\n21096.0 18455.75986659255\n21096.0 2495.9733185102837" | \
  gdaltransform -tps -output_xy GX_4190_SD_frame_8.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4190_SD_frame_8.vrt GX_4190_SD_frame_8.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4190_SD_frame_8.cut.vrt GX_4190_SD_frame_8.xyz