#!/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 23.86419296 56.99077874 -gcp 21564.0 0.0 23.91079903 57.08497086 -gcp 21564.0 21573.0 24.07660086 57.06134349 -gcp 0.0 21573.0 24.03718472 56.97052688 GX2206/GX_2206_SK_frame_58.jpg GX_2206_SK_frame_58.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "888.0 2880.1604456824516\n21000.0 3047.8796657381613\n21096.0 19872.374373259052\n3432.0 19896.521448467967\n1008.0 18719.91977715878" | \
  gdaltransform -tps -output_xy GX_2206_SK_frame_58.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2206_SK_frame_58.vrt GX_2206_SK_frame_58.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2206_SK_frame_58.cut.vrt GX_2206_SK_frame_58.xyz