#!/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 26.83684229850769 57.681445858668994 -gcp 10500.0 0.0 26.834020614624027 57.655447108328175 -gcp 10500.0 10635.0 26.784936189651493 57.656996882998214 -gcp 0.0 10635.0 26.788196816878877 57.68323279288069 Aluksne-1989-1185/Aluksne-1989-1185-103.jpg Aluksne-1989-1185-103.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1038.0 1029.0\n978.0 9543.0\n9399.0 9609.0\n9471.0 1062.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-103.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-103.vrt Aluksne-1989-1185-103.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-103.cut.vrt Aluksne-1989-1185-103.xyz