#!/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 26.89663946628571 57.459668354607956 -gcp 10908.0 0.0 26.89477716527714 57.433560236902174 -gcp 10908.0 11007.0 26.84470577814098 57.433944381861004 -gcp 0.0 11007.0 26.846342420102747 57.46097748554572 Aluksne-1989-1186/Aluksne-1989-1186-87.jpg Aluksne-1989-1186-87.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1434.0 1065.0\n9927.0 1413.0\n9555.0 9828.0\n1071.0 9474.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-87.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-87.vrt Aluksne-1989-1186-87.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-87.cut.vrt Aluksne-1989-1186-87.xyz