#!/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 2415.0 2667.0 21.898233333333334 56.677033333333334 -gcp 30066.0 2655.0 23.093783333333334 56.74915 -gcp 30042.0 22407.0 23.18235 56.2773 -gcp 2463.0 22389.0 22.0042 56.20791666666667 1915_3verst_de_126k/uw/Reihe_IX_Blatt_2_Laishew_1915_uw.jpg Reihe_IX_Blatt_2_Laishew_1915_uw.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2415.0 2667.0\n30066.0 2655.0\n30042.0 22407.0\n2463.0 22389.0" | \
  gdaltransform -tps -output_xy Reihe_IX_Blatt_2_Laishew_1915_uw.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_IX_Blatt_2_Laishew_1915_uw.vrt Reihe_IX_Blatt_2_Laishew_1915_uw.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_IX_Blatt_2_Laishew_1915_uw.cut.vrt Reihe_IX_Blatt_2_Laishew_1915_uw.xyz