#!/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 27.019600034900034 57.417756698736 -gcp 10878.0 0.0 27.022905410694047 57.39135385257105 -gcp 10878.0 10941.0 26.973989002998007 57.38974264830509 -gcp 0.0 10941.0 26.971305899695448 57.4162090543232 Aluksne-1989-1186/Aluksne-1989-1186-24.jpg Aluksne-1989-1186-24.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1443.0 1011.0\n9870.0 1434.0\n9417.0 9957.0\n1000.5 9528.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-24.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-24.vrt Aluksne-1989-1186-24.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-24.cut.vrt Aluksne-1989-1186-24.xyz