#!/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 26.8991249668803 57.36539344831636 -gcp 10737.0 0.0 26.89804731643087 57.33950805537967 -gcp 10737.0 10803.0 26.849030319691906 57.34020917076356 -gcp 0.0 10803.0 26.85074633588698 57.366627123728364 Aluksne-1989-1186/Aluksne-1989-1186-95.jpg Aluksne-1989-1186-95.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1029.0 1275.0\n9516.0 1032.0\n9741.0 9441.0\n1242.0 9690.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-95.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-95.vrt Aluksne-1989-1186-95.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-95.cut.vrt Aluksne-1989-1186-95.xyz