#!/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 24.79876041 56.96236221 -gcp 21414.0 0.0 24.8298955 57.06024343 -gcp 21414.0 21666.0 24.99582767 57.04522403 -gcp 0.0 21666.0 24.9813652 56.95424257 GX2206/GX_2206_SK_frame_40.jpg GX_2206_SK_frame_40.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "816.0 3287.8261838440108\n768.0 19007.705849582173\n3648.0 20808.695264623955\n21120.0 20376.45459610028\n21096.0 3167.919777158774" | \
  gdaltransform -tps -output_xy GX_2206_SK_frame_40.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2206_SK_frame_40.vrt GX_2206_SK_frame_40.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2206_SK_frame_40.cut.vrt GX_2206_SK_frame_40.xyz