#!/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 24.25163269043 56.965239935681 -gcp 14664.0 0.0 24.407415390015 56.972257835475 -gcp 14664.0 15546.0 24.417972564697 56.897519554452 -gcp 0.0 15546.0 24.262189865112 56.890501654658 LVVA_F7404_US1_GV81_0002.jpg LVVA_F7404_US1_GV81_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"531.0 450.0\n7314.0 432.0\n7421.25 399.75\n7520.25 388.5\n7621.5 399.75\n7726.5 435.0\n14097.0 414.0\n14064.0 6939.0\n10038.0 6981.0\n9948.0 14610.0\n567.0 14538.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV81_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV81_0002.vrt LVVA_F7404_US1_GV81_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV81_0002.cut.vrt LVVA_F7404_US1_GV81_0002.xyz