#!/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 26.6511019241068 57.44460955511876 -gcp 11385.0 0.0 26.644266168612127 57.41641724114216 -gcp 11385.0 11331.0 26.592038364691543 57.41976250190312 -gcp 0.0 11331.0 26.598863391350154 57.44842565461105 Aluksne-1989-1186/Aluksne-1989-1186-7.jpg Aluksne-1989-1186-7.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1083.0 1740.0\n9448.5 951.0\n10245.0 9360.0\n1869.0 10161.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-7.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-7.vrt Aluksne-1989-1186-7.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-7.cut.vrt Aluksne-1989-1186-7.xyz