#!/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 1509.0 1426.6236768802228 24 57.25 -gcp 12053.25 1461.8461002785516 24.5 57.25 -gcp 12068.071688997554 11199.938010285685 24.5 57 -gcp 1444.5 11163.920473537604 24 57 38-Daugavgriva_1940.jpg 38-Daugavgriva_1940.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1509.0 1426.6236768802228\n12053.25 1461.8461002785516\n12068.071688997554 11199.938010285685\n1444.5 11163.920473537604\" | \
  gdaltransform -tps -output_xy 38-Daugavgriva_1940.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  38-Daugavgriva_1940.vrt 38-Daugavgriva_1940.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 38-Daugavgriva_1940.cut.vrt 38-Daugavgriva_1940.xyz