#!/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 24.581565856934 57.483540829986 -gcp 10629.0 0.0 24.573497772217 57.437189310029 -gcp 10629.0 21597.0 24.371452331543 57.446427368421 -gcp 0.0 21597.0 24.376602172852 57.494427677923 LVVA_F7404_US1_GV1875_0002.jpg LVVA_F7404_US1_GV1875_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1288.5 12855.0\n1245.0 5197.5\n1077.0 4735.5\n1266.0 4353.0\n1249.5 2563.5\n8041.5 2581.5\n8292.0 3198.0\n9972.0 3183.0\n10164.0 11064.0\n8088.0 11097.0\n8124.0 20941.5\n1333.5 21010.5\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1875_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1875_0002.vrt LVVA_F7404_US1_GV1875_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1875_0002.cut.vrt LVVA_F7404_US1_GV1875_0002.xyz