#!/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 24.2603997 57.18303217 -gcp 21600.0 0.0 24.23799954 57.09925344 -gcp 21600.0 23280.0 24.06095143 57.10908871 -gcp 0.0 23280.0 24.07981697 57.20152983 GX10514/GX_10514_SK_frame_416.jpg GX_10514_SK_frame_416.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "648.0 2784.0\n648.0 19776.0\n20808.0 19776.0\n21072.0 2424.0" | \
  gdaltransform -tps -output_xy GX_10514_SK_frame_416.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10514_SK_frame_416.vrt GX_10514_SK_frame_416.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10514_SK_frame_416.cut.vrt GX_10514_SK_frame_416.xyz