#!/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 26.884165327781 57.645820494169 -gcp 10572.0 0.0 26.985641809247 57.652731172207 -gcp 10572.0 15963.0 27.00718443566 57.56714193762 -gcp 0.0 15963.0 26.905707954194 57.560231259582 LVVA_F7404_US1_GV1817_0002.jpg LVVA_F7404_US1_GV1817_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"678.0 726.0\n9999.0 852.0\n9951.0 14973.0\n558.0 14907.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1817_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1817_0002.vrt LVVA_F7404_US1_GV1817_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1817_0002.cut.vrt LVVA_F7404_US1_GV1817_0002.xyz