#!/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 26.739595497585988 57.476001595115385 -gcp 11070.0 0.0 26.743380458757706 57.448490006092726 -gcp 11070.0 11061.0 26.69193641429454 57.446417855492406 -gcp 0.0 11061.0 26.687695477590285 57.47415426997098 Aluksne-1989-1186/Aluksne-1989-1186-157.jpg Aluksne-1989-1186-157.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1671.0 1035.0\n10173.0 1602.0\n9579.0 10023.0\n1092.0 9447.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-157.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-157.vrt Aluksne-1989-1186-157.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-157.cut.vrt Aluksne-1989-1186-157.xyz