#!/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 936.0 3024.0 26.25 57.5 -gcp 22059.0 3033.0 27 57.5 -gcp 22305.0 27489.0 27 57.03333333333333 -gcp 870.0 27480.0 26.25 57.03333333333333 mapster/Estland-Lettland_100K_34_SO_Valka_Walk_1940_incomplete.jpg Estland-Lettland_100K_34_SO_Valka_Walk_1940_incomplete.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "936.0 3024.0\n22059.0 3033.0\n22311.0 28134.324283559577\n867.0 28090.806938159883" | \
  gdaltransform -tps -output_xy Estland-Lettland_100K_34_SO_Valka_Walk_1940_incomplete.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Estland-Lettland_100K_34_SO_Valka_Walk_1940_incomplete.vrt Estland-Lettland_100K_34_SO_Valka_Walk_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_SO_Valka_Walk_1940_incomplete.cut.vrt Estland-Lettland_100K_34_SO_Valka_Walk_1940_incomplete.xyz