#!/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 24.571695327759 57.469419999169 -gcp 7056.0 0.0 24.670915603638 57.475627376471 -gcp 7056.0 8727.0 24.684734344482 57.408721430086 -gcp 0.0 8727.0 24.583797454834 57.402618289756 LVVA_F7404_US1_GV304_0002.jpg LVVA_F7404_US1_GV304_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"327.0 411.0\n6774.0 501.0\n6723.0 5007.0\n5868.0 4998.0\n5814.0 8091.0\n963.0 8076.0\n987.0 4902.0\n330.0 4890.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV304_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV304_0002.vrt LVVA_F7404_US1_GV304_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV304_0002.cut.vrt LVVA_F7404_US1_GV304_0002.xyz