#!/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 25.391120910645 56.686785314181 -gcp 10545.0 0.0 25.494718551636 56.695410863885 -gcp 10545.0 8610.0 25.507850646973 56.650800656103 -gcp 0.0 8610.0 25.404253005982 56.642175106399 LVVA_F7404_US1_GV1453_0002.jpg LVVA_F7404_US1_GV1453_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"622.5 436.5\n9993.0 525.0\n9994.5 814.5\n10107.0 835.5\n10135.5 1077.0\n10063.5 1435.5\n9981.0 1579.5\n9945.0 7698.0\n655.5 7645.5\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1453_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1453_0002.vrt LVVA_F7404_US1_GV1453_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1453_0002.cut.vrt LVVA_F7404_US1_GV1453_0002.xyz