#!/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 1073.25 1488.0376044568245 25 57.5 -gcp 13569.75 1488.8310584958217 25.5 57.5 -gcp 13622.25 13058.387465181058 25.5 57.25 -gcp 1044.0 13059.222284122563 25 57.25 55-Cesis_1931.jpg 55-Cesis_1931.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1073.25 1488.0376044568245\n13569.75 1488.8310584958217\n13622.25 13058.387465181058\n1044.0 13059.222284122563\" | \
  gdaltransform -tps -output_xy 55-Cesis_1931.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  55-Cesis_1931.vrt 55-Cesis_1931.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 55-Cesis_1931.cut.vrt 55-Cesis_1931.xyz