#!/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 25.27903676 57.30034523 -gcp 27636.0 0.0 25.25328755 57.31041892 -gcp 27636.0 22011.0 25.26851177 57.3223276 -gcp 0.0 22011.0 25.29461503 57.31119103 GX5131/c_GX_5131_SK_frame_17.jpg c_GX_5131_SK_frame_17.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 0.0\n0.0 22008.0\n27633.0 22008.0\n27633.0 0.0" | \
  gdaltransform -tps -output_xy c_GX_5131_SK_frame_17.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  c_GX_5131_SK_frame_17.vrt c_GX_5131_SK_frame_17.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES c_GX_5131_SK_frame_17.cut.vrt c_GX_5131_SK_frame_17.xyz