#!/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 26.893973350524902 57.42886151113179 -gcp 10659.0 0.0 26.895893812179565 57.40343903635647 -gcp 10659.0 10704.0 26.847580818311208 57.40215937225894 -gcp 0.0 10704.0 26.84597253799439 57.42800667835007 Aluksne-1989-1186/Aluksne-1989-1186-90.jpg Aluksne-1989-1186-90.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1209.0 987.0\n9702.0 1152.0\n9525.0 9561.0\n1029.0 9405.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-90.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-90.vrt Aluksne-1989-1186-90.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-90.cut.vrt Aluksne-1989-1186-90.xyz