#!/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 2421.0 4689.0 25 59.5 -gcp 22446.0 4290.0 28 59.5 -gcp 23502.0 30282.0 28 57.5 -gcp 2337.0 30624.0 25 57.5 1941_Strassenkarte_der_Baltischen_Laender_Blatt_2_Estland_Ostblatt_mapywig_COMP75.jpg 1941_Strassenkarte_der_Baltischen_Laender_Blatt_2_Estland_Ostblatt_mapywig_COMP75.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "854.25 1867.4947209653092\n25329.0 1923.050527903469\n25180.5 31160.998491704377\n805.5 31011.001508295623" | \
  gdaltransform -tps -output_xy 1941_Strassenkarte_der_Baltischen_Laender_Blatt_2_Estland_Ostblatt_mapywig_COMP75.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  1941_Strassenkarte_der_Baltischen_Laender_Blatt_2_Estland_Ostblatt_mapywig_COMP75.vrt 1941_Strassenkarte_der_Baltischen_Laender_Blatt_2_Estland_Ostblatt_mapywig_COMP75.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_2_Estland_Ostblatt_mapywig_COMP75.cut.vrt 1941_Strassenkarte_der_Baltischen_Laender_Blatt_2_Estland_Ostblatt_mapywig_COMP75.xyz