#!/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 25.669469833374 57.754464958671 -gcp 10425.0 0.0 25.765085220337 57.766049197471 -gcp 10425.0 11268.0 25.790748596191 57.711758958332 -gcp 0.0 11268.0 25.69221496582 57.697909930605 LVVA_F7404_US1_GV1260_0002.jpg LVVA_F7404_US1_GV1260_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"447.0 330.0\n9885.0 330.0\n9946.5 7470.75\n4648.5 7396.5\n4654.5 10048.5\n600.0 10038.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1260_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1260_0002.vrt LVVA_F7404_US1_GV1260_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1260_0002.cut.vrt LVVA_F7404_US1_GV1260_0002.xyz