#!/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 26.618336039543156 57.497819414778114 -gcp 10506.0 0.0 26.615433889389042 57.47074190897137 -gcp 10506.0 10530.0 26.56498174095154 57.47240610865312 -gcp 0.0 10530.0 26.568055552482605 57.4990215174727 Aluksne-1989-1186/Aluksne-1989-1186-196.jpg Aluksne-1989-1186-196.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1002.0 1098.0\n9462.0 1026.0\n9531.0 9450.0\n1050.0 9525.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-196.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-196.vrt Aluksne-1989-1186-196.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-196.cut.vrt Aluksne-1989-1186-196.xyz