#!/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 26.863548952103 57.483688138184 -gcp 10509.0 0.0 26.863270002365 57.457515027949 -gcp 10509.0 10623.0 26.815972131729 57.457056256331 -gcp 0.0 10623.0 26.814110678673 57.483223826781 Aluksne-1989-1186/Aluksne-1989-1186-106.jpg Aluksne-1989-1186-106.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1107.0 1044.0\n9504.0 1014.0\n9537.0 9507.0\n1128.0 9558.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-106.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-106.vrt Aluksne-1989-1186-106.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-106.cut.vrt Aluksne-1989-1186-106.xyz