#!/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 24.949865341187 57.151140461794 -gcp 14955.0 0.0 25.076036453247 57.166919815074 -gcp 14955.0 15357.0 25.106935501099 57.090194167205 -gcp 0.0 15357.0 24.981107711792 57.073495662208 LVVA_F7404_US1_GV1716_0002.jpg LVVA_F7404_US1_GV1716_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"786.0 525.0\n10179.0 576.0\n10096.5 7108.5\n10062.0 14157.0\n717.0 14073.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1716_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1716_0002.vrt LVVA_F7404_US1_GV1716_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1716_0002.cut.vrt LVVA_F7404_US1_GV1716_0002.xyz