#!/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 822.0 1188.0 20.876666666666665 57 -gcp 13788.0 1311.0 21.326666666666668 57 -gcp 13740.0 14406.0 21.326666666666668 56.75 -gcp 705.0 14313.0 20.876666666666665 56.75 IV-9_Paulshafen.jpg IV-9_Paulshafen.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "822.0 1188.0\n13788.0 1311.0\n13740.0 14406.0\n705.0 14313.0" | \
  gdaltransform -tps -output_xy IV-9_Paulshafen.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  IV-9_Paulshafen.vrt IV-9_Paulshafen.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES IV-9_Paulshafen.cut.vrt IV-9_Paulshafen.xyz