#!/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 26.834205585479737 57.416506135795274 -gcp 10593.0 0.0 26.833400922775272 57.39014947497307 -gcp 10593.0 10686.0 26.785185736656192 57.390062752909444 -gcp 0.0 10686.0 26.78548077964783 57.416442574961046 Aluksne-1989-1186/Aluksne-1989-1186-114.jpg Aluksne-1989-1186-114.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1044.0 1071.0\n9447.0 996.0\n9516.0 9498.0\n1104.0 9567.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-114.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-114.vrt Aluksne-1989-1186-114.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-114.cut.vrt Aluksne-1989-1186-114.xyz