#!/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 3270.0 10713.0 22 59 -gcp 23550.0 4665.0 25 59.5 -gcp 23634.0 30612.0 25 57.5 -gcp 2409.0 30204.0 22 57.5 1941_Strassenkarte_der_Baltischen_Laender_Blatt_1_Estland_Westland_mapywig_COMP65.jpg 1941_Strassenkarte_der_Baltischen_Laender_Blatt_1_Estland_Westland_mapywig_COMP65.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "966.75 1831.554298642534\n25358.625 1867.1233031674205\n25440.75 30999.748868778282\n1005.75 31063.50056561086" | \
  gdaltransform -tps -output_xy 1941_Strassenkarte_der_Baltischen_Laender_Blatt_1_Estland_Westland_mapywig_COMP65.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  1941_Strassenkarte_der_Baltischen_Laender_Blatt_1_Estland_Westland_mapywig_COMP65.vrt 1941_Strassenkarte_der_Baltischen_Laender_Blatt_1_Estland_Westland_mapywig_COMP65.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 1941_Strassenkarte_der_Baltischen_Laender_Blatt_1_Estland_Westland_mapywig_COMP65.cut.vrt 1941_Strassenkarte_der_Baltischen_Laender_Blatt_1_Estland_Westland_mapywig_COMP65.xyz