#!/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 0.0 0.0 26.146430969238 56.868726956802 -gcp 14520.0 0.0 26.292085647583 56.868117101735 -gcp 14520.0 8580.0 26.289253234863 56.818028157518 -gcp 0.0 8580.0 26.141624450684 56.819014622217 LVVA_F7404_US1_GV1617_0002.jpg LVVA_F7404_US1_GV1617_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"510.0 618.0\n9930.0 588.0\n9984.0 4812.0\n9480.0 6150.0\n8676.0 6150.0\n8496.0 6853.5\n8274.0 6859.5\n8218.5 6892.5\n8217.0 7569.0\n7962.0 7842.0\n5610.0 7831.5\n5307.0 7572.0\n588.0 7590.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1617_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1617_0002.vrt LVVA_F7404_US1_GV1617_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1617_0002.cut.vrt LVVA_F7404_US1_GV1617_0002.xyz