#!/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 25.36127063 57.34890369 -gcp 12009.0 0.0 25.36495732 57.32890923 -gcp 12009.0 12495.0 25.32651423 57.32688095 -gcp 0.0 12495.0 25.3231428 57.34751534 GX18586/GX_18586_SK_frame_35.jpg GX_18586_SK_frame_35.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1257.0 741.0\n1242.0 1536.0\n432.0 1542.0\n270.0 9264.0\n11520.0 9618.0\n11520.0 744.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_35.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_35.vrt GX_18586_SK_frame_35.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_35.cut.vrt GX_18586_SK_frame_35.xyz