#!/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 1473.0 2430.0 27.908883333333332 56.924366666666664 -gcp 29004.0 2379.0 29.11703333333333 56.9402 -gcp 29049.0 22077.0 29.1317 56.465333333333334 -gcp 1542.0 22179.0 27.939783333333335 56.44968333333333 1915_3verst_de_126k/uw/Reihe_IX_Blatt_7_Opotschka_1915_zal_ark_ewid_A,B,C_Rejon_Ewid_5b_uw.jpg Reihe_IX_Blatt_7_Opotschka_1915_zal_ark_ewid_A,B,C_Rejon_Ewid_5b_uw.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1473.0 2430.0\n15232.5 2392.493337034981\n29004.0 2379.0\n29007.75 12240.757079400333\n29049.0 22077.0\n15294.75 22124.24791782343\n1542.0 22179.0" | \
  gdaltransform -tps -output_xy Reihe_IX_Blatt_7_Opotschka_1915_zal_ark_ewid_A,B,C_Rejon_Ewid_5b_uw.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_IX_Blatt_7_Opotschka_1915_zal_ark_ewid_A,B,C_Rejon_Ewid_5b_uw.vrt Reihe_IX_Blatt_7_Opotschka_1915_zal_ark_ewid_A,B,C_Rejon_Ewid_5b_uw.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_IX_Blatt_7_Opotschka_1915_zal_ark_ewid_A,B,C_Rejon_Ewid_5b_uw.cut.vrt Reihe_IX_Blatt_7_Opotschka_1915_zal_ark_ewid_A,B,C_Rejon_Ewid_5b_uw.xyz