#!/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 25.331125259399 57.247155176866 -gcp 14742.0 0.0 25.474634170532 57.25063769699 -gcp 14742.0 12537.0 25.48038482666 57.190506462877 -gcp 0.0 12537.0 25.333185195923 57.185994994605 LVVA_F7404_US1_GV1538_0002.jpg LVVA_F7404_US1_GV1538_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"741.0 7713.0\n678.0 5005.5\n657.0 609.0\n9915.0 723.0\n9870.0 6007.5\n9930.0 6129.0\n10008.0 6564.0\n10005.0 6754.5\n9856.5 6975.0\n9852.0 7761.0\n4659.0 7698.0\n4650.0 11402.25\n780.0 11376.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1538_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1538_0002.vrt LVVA_F7404_US1_GV1538_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1538_0002.cut.vrt LVVA_F7404_US1_GV1538_0002.xyz