#!/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 22.58639107 57.82393673 -gcp 10980.0 0.0 22.76739628 57.77843861 -gcp 10980.0 11322.0 22.67571688 57.66832835 -gcp 0.0 11322.0 22.48045206 57.72563707 GX13126/GX_13126_SK_frame_59.jpg GX_13126_SK_frame_59.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "360.0 1535.9465181058495\n9936.0 1223.852924791086\n10104.0 9720.106963788301\n552.0 10032.200557103064" | \
  gdaltransform -tps -output_xy GX_13126_SK_frame_59.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_13126_SK_frame_59.vrt GX_13126_SK_frame_59.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_13126_SK_frame_59.cut.vrt GX_13126_SK_frame_59.xyz