#!/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 26.742597098278054 57.580518723511645 -gcp 10485.0 0.0 26.741837286725715 57.55455510336198 -gcp 10485.0 13332.0 26.678907255951874 57.55484732672763 -gcp 0.0 13332.0 26.679782867431644 57.58126763075046 Aluksne-1989-1185/Aluksne-1989-1185-160.jpg Aluksne-1989-1185-160.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1005.0 1083.0\n993.0 9534.0\n9510.0 9540.0\n9540.0 1086.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-160.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-160.vrt Aluksne-1989-1185-160.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-160.cut.vrt Aluksne-1989-1185-160.xyz