#!/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 23.584254686263 56.945116129466 -gcp 12402.0 0.0 23.702624307504 56.953785278198 -gcp 12402.0 19488.0 23.724529171055 56.852460378176 -gcp 0.0 19488.0 23.606159549814 56.843791229444 LVVA_F7404_US1_GV2_0002.jpg LVVA_F7404_US1_GV2_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"2170.5 6594.0\n2145.0 5904.0\n759.0 5886.0\n759.0 4126.5\n741.0 1752.0\n2121.0 1744.5\n2137.5 451.5\n6813.0 549.0\n11490.0 640.5\n11352.0 6508.5\n11391.75 6621.0\n11478.0 8568.0\n11451.0 13193.25\n11265.0 13206.0\n11235.0 17352.0\n11262.0 18595.5\n8262.0 18550.5\n8274.0 13524.0\n2184.0 13579.5\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV2_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV2_0002.vrt LVVA_F7404_US1_GV2_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV2_0002.cut.vrt LVVA_F7404_US1_GV2_0002.xyz