#!/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 1536.0 2085.905503057254 26.25 58 -gcp 17251.5 1990.9519177320733 27 58 -gcp 17565.75 21000.412312395776 27.000102996826175 57.51651228680032 -gcp 1632.0 21087.38938299055 26.250071525573734 57.51635274430767 mapster/Estland-Lettland_100K_34-NO_Valka_(Walk)_IX.1940_incomplete.jpg Estland-Lettland_100K_34-NO_Valka_(Walk)_IX.1940_incomplete.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1536.0 2085.905503057254\n17251.5 1990.9519177320733\n17566.5 21132.073374096723\n1632.0 21121.518760422456" | \
  gdaltransform -tps -output_xy Estland-Lettland_100K_34-NO_Valka_(Walk)_IX.1940_incomplete.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Estland-Lettland_100K_34-NO_Valka_(Walk)_IX.1940_incomplete.vrt Estland-Lettland_100K_34-NO_Valka_(Walk)_IX.1940_incomplete.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Estland-Lettland_100K_34-NO_Valka_(Walk)_IX.1940_incomplete.cut.vrt Estland-Lettland_100K_34-NO_Valka_(Walk)_IX.1940_incomplete.xyz