#!/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 26.957102828066844 57.38786703566771 -gcp 10506.0 0.0 26.95772777784067 57.36233843229951 -gcp 10506.0 12810.0 26.897736010136313 57.36134854517907 -gcp 0.0 12810.0 26.897717239599853 57.38810920552722 Aluksne-1989-1186/Aluksne-1989-1186-62.jpg Aluksne-1989-1186-62.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1026.75 988.5\n9491.25 988.5\n9440.25 9396.0\n1017.0 9396.75" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-62.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-62.vrt Aluksne-1989-1186-62.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-62.cut.vrt Aluksne-1989-1186-62.xyz