#!/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 26.959859132766727 57.59182057994262 -gcp 10485.0 0.0 26.95901155471802 57.565625238181596 -gcp 10485.0 13260.0 26.89783573150635 57.566321493544244 -gcp 0.0 13260.0 26.897717714309696 57.5922403341617 Aluksne-1989-1185/Aluksne-1989-1185-62.jpg Aluksne-1989-1185-62.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1008.0 936.0\n9516.0 990.0\n9423.0 9426.0\n959.625 9372.375" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-62.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-62.vrt Aluksne-1989-1185-62.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-62.cut.vrt Aluksne-1989-1185-62.xyz