#!/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 25.055694580078 57.380231408376 -gcp 15945.0 0.0 25.093975067139 57.299636654838 -gcp 15945.0 21597.0 24.878711700439 57.273660480293 -gcp 0.0 21597.0 24.849529266357 57.359034534927 LVVA_F7404_US1_GV196_0002.jpg LVVA_F7404_US1_GV196_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"627.0 708.0\n8436.0 924.0\n8439.0 4.5\n15444.0 3.0\n15381.0 20511.0\n468.0 20463.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV196_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV196_0002.vrt LVVA_F7404_US1_GV196_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV196_0002.cut.vrt LVVA_F7404_US1_GV196_0002.xyz