#!/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 25.953569412231 56.939262209258 -gcp 15060.0 0.0 26.090469360352 56.944974180852 -gcp 15060.0 12402.0 26.103601455688 56.877685988628 -gcp 0.0 12402.0 25.964641571045 56.868726956802 LVVA_F7404_US1_GV1106_0002.jpg LVVA_F7404_US1_GV1106_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1062.0 9066.0\n1614.0 6516.0\n1833.0 6498.0\n2277.0 5619.0\n1728.0 4674.0\n1788.0 798.0\n14496.0 852.0\n14637.0 11589.0\n1116.0 11526.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1106_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1106_0002.vrt LVVA_F7404_US1_GV1106_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1106_0002.cut.vrt LVVA_F7404_US1_GV1106_0002.xyz