#!/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 18592.5 12172.851432880845 23.25 56.666666666666664 -gcp 18721.5 1347.2307692307693 23.5 56.666666666666664 -gcp 31851.0 1456.785822021116 23.5 56.5 -gcp 31707.75 12363.286199095022 23.25 56.5 mapster/RKKA050_O-34-131-B_Dobele_1935_greif.jpg RKKA050_O-34-131-B_Dobele_1935_greif.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "18720.0 1347.0\n31854.0 1455.0\n31707.0 12363.0\n18594.0 12172.497737556561" | \
  gdaltransform -tps -output_xy RKKA050_O-34-131-B_Dobele_1935_greif.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  RKKA050_O-34-131-B_Dobele_1935_greif.vrt RKKA050_O-34-131-B_Dobele_1935_greif.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES RKKA050_O-34-131-B_Dobele_1935_greif.cut.vrt RKKA050_O-34-131-B_Dobele_1935_greif.xyz