#!/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 25.344686508179 57.890539296943 -gcp 14424.0 0.0 25.47935485839844 57.89902404547928 -gcp 14424.0 8343.0 25.487422943115238 57.85566695311003 -gcp 0.0 8343.0 25.352153778076 57.84758306612 LVVA_F7404_US1_GV1414_0002.jpg LVVA_F7404_US1_GV1414_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"4650.0 321.0\n13833.0 450.0\n13833.0 7461.0\n4623.0 7413.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1414_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1414_0002.vrt LVVA_F7404_US1_GV1414_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1414_0002.cut.vrt LVVA_F7404_US1_GV1414_0002.xyz