#!/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 26.899446154505533 57.49086345139064 -gcp 10509.0 0.0 26.899176836013794 57.464873416544265 -gcp 10509.0 10545.0 26.85071468353272 57.46528308378348 -gcp 0.0 10545.0 26.850962630516577 57.4910810531897 Aluksne-1989-1186/Aluksne-1989-1186-84.jpg Aluksne-1989-1186-84.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "987.0 1023.0\n9426.0 1002.0\n9426.0 9405.0\n977.25 9426.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-84.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-84.vrt Aluksne-1989-1186-84.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-84.cut.vrt Aluksne-1989-1186-84.xyz