#!/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 2001.0 1022.0694830461367 24.75030899047852 57.96184438191869 -gcp 33522.0 2545.876876042246 25.500040054321293 57.94025709240283 -gcp 33970.5 37415.77404113396 25.5 57.5 -gcp 2128.5 37582.92940522512 24.75 57.5 mapster/Estland-Lettland_100K_33_Valmiera_(Wolmar)_NO_IV.1941_incomplete.jpg Estland-Lettland_100K_33_Valmiera_(Wolmar)_NO_IV.1941_incomplete.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1995.0 221.5547526403558\n33483.0 233.96998332406895\n33970.5 37415.77404113396\n2128.5 37582.92940522512" | \
  gdaltransform -tps -output_xy Estland-Lettland_100K_33_Valmiera_(Wolmar)_NO_IV.1941_incomplete.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Estland-Lettland_100K_33_Valmiera_(Wolmar)_NO_IV.1941_incomplete.vrt Estland-Lettland_100K_33_Valmiera_(Wolmar)_NO_IV.1941_incomplete.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Estland-Lettland_100K_33_Valmiera_(Wolmar)_NO_IV.1941_incomplete.cut.vrt Estland-Lettland_100K_33_Valmiera_(Wolmar)_NO_IV.1941_incomplete.xyz