#!/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 25.752639770508 57.060430139283 -gcp 10491.0 0.0 25.859241485596 57.050721344427 -gcp 10491.0 11796.0 25.836067199707 56.988300465473 -gcp 0.0 11796.0 25.731353759766 56.999241034571 LVVA_F7404_US1_GV909_0002.jpg LVVA_F7404_US1_GV909_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"516.0 639.0\n4581.0 654.0\n4587.0 3082.5\n4653.0 3172.5\n4678.5 3255.0\n4650.0 3336.0\n4653.0 3618.0\n4731.0 3657.0\n9810.0 3606.0\n9939.0 10674.0\n558.0 10725.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV909_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV909_0002.vrt LVVA_F7404_US1_GV909_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV909_0002.cut.vrt LVVA_F7404_US1_GV909_0002.xyz