#!/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 25.706033706665 57.019991223601 -gcp 10863.0 0.0 25.809803009033 57.028400164914 -gcp 10863.0 16119.0 25.835208892822 56.946565885899 -gcp 0.0 16119.0 25.730066299438 56.93551617913 LVVA_F7404_US1_GV934_0002.jpg LVVA_F7404_US1_GV934_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"786.0 600.0\n10248.0 705.0\n10230.0 3189.0\n10477.5 3427.5\n10482.0 4104.0\n10234.5 4293.0\n10236.0 8097.0\n10492.5 8335.5\n10495.5 8716.5\n10237.5 8947.5\n10221.0 15162.0\n687.0 15063.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV934_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV934_0002.vrt LVVA_F7404_US1_GV934_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV934_0002.cut.vrt LVVA_F7404_US1_GV934_0002.xyz