#!/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 25.044536590576 57.339400309092 -gcp 10290.0 0.0 25.215253829956 57.355840057833 -gcp 10290.0 10890.0 25.242290496826 57.267256392589 -gcp 0.0 10890.0 25.081958770752 57.250823422153 LVVA_F7404_US1_GV219_0002.jpg LVVA_F7404_US1_GV219_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"420.0 5208.0\n795.0 4824.0\n1779.0 4614.0\n2382.0 4506.0\n3072.0 4221.0\n3621.0 3894.0\n4263.0 3156.0\n4608.0 2775.0\n6942.0 2793.0\n6948.0 5508.0\n9858.0 5460.0\n9954.0 10236.0\n414.0 10176.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV219_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV219_0002.vrt LVVA_F7404_US1_GV219_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV219_0002.cut.vrt LVVA_F7404_US1_GV219_0002.xyz