#!/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 25.934257507324 57.697818197536 -gcp 15060.0 0.0 26.102313995361 57.70570639245 -gcp 15060.0 15945.0 26.119995117188 57.631985769444 -gcp 0.0 15945.0 25.94181060791 57.626839013846 LVVA_F7404_US1_GV1279_0002.jpg LVVA_F7404_US1_GV1279_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"889.5 7731.0\n852.0 741.0\n14544.0 774.0\n14442.0 14982.0\n5005.5 14982.0\n5037.0 7780.5\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1279_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1279_0002.vrt LVVA_F7404_US1_GV1279_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1279_0002.cut.vrt LVVA_F7404_US1_GV1279_0002.xyz