#!/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 26.865520911747307 57.38725028818604 -gcp 10506.0 0.0 26.86594925620508 57.36152295220442 -gcp 10506.0 10596.0 26.818616238257 57.36060698205565 -gcp 0.0 10596.0 26.816701950004976 57.38697628056227 Aluksne-1989-1186/Aluksne-1989-1186-100.jpg Aluksne-1989-1186-100.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1107.0 993.0\n9528.0 1005.0\n9489.0 9516.0\n1080.0 9486.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-100.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-100.vrt Aluksne-1989-1186-100.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-100.cut.vrt Aluksne-1989-1186-100.xyz