#!/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 26.74236674880982 57.34549200687491 -gcp 10503.0 0.0 26.74205561256409 57.31910168627577 -gcp 10503.0 10521.0 26.693030399322513 57.319252295301595 -gcp 0.0 10521.0 26.693116641017802 57.34557948523218 Aluksne-1989-1186/Aluksne-1989-1186-148.jpg Aluksne-1989-1186-148.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1092.0 1065.0\n9549.0 1056.0\n9543.0 9477.0\n1068.0 9480.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-148.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-148.vrt Aluksne-1989-1186-148.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-148.cut.vrt Aluksne-1989-1186-148.xyz