#!/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 26.551138193130495 57.50050319151293 -gcp 10575.0 0.0 26.55349317264557 57.473481885438154 -gcp 10575.0 10701.0 26.503487198829653 57.472080196833545 -gcp 0.0 10701.0 26.500928371429442 57.499012869393226 Aluksne-1989-1186/Aluksne-1989-1186-218.jpg Aluksne-1989-1186-218.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1071.0 1008.0\n9480.0 942.0\n9528.0 9471.0\n1113.0 9522.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-218.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-218.vrt Aluksne-1989-1186-218.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-218.cut.vrt Aluksne-1989-1186-218.xyz