#!/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 1926.0 3642.0 26.5055 58.79148333333333 -gcp 43242.0 3084.0 27.775933333333334 58.8204 -gcp 43482.0 32742.0 27.812216666666668 58.346266666666665 -gcp 2214.0 33285.0 26.553616666666667 58.315983333333335 1915_3verst_de_126k/loc/Reihe_V_Blatt_6_Dorpat__1915_loc.jpg Reihe_V_Blatt_6_Dorpat__1915_loc.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2035.5 18486.01249305941\n1926.0 3642.0\n22584.0 3338.9866740699613\n43242.0 3084.0\n43395.0 17925.00333148251\n43482.0 32742.0\n22833.0 33013.5\n2214.0 33285.0" | \
  gdaltransform -tps -output_xy Reihe_V_Blatt_6_Dorpat__1915_loc.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_V_Blatt_6_Dorpat__1915_loc.vrt Reihe_V_Blatt_6_Dorpat__1915_loc.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_V_Blatt_6_Dorpat__1915_loc.cut.vrt Reihe_V_Blatt_6_Dorpat__1915_loc.xyz