#!/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 25.407750606537 57.54576196914 -gcp 10593.0 0.0 25.442554950714 57.547995760411 -gcp 10593.0 8349.0 25.445387363434 57.533715559307 -gcp 0.0 8349.0 25.410952209719 57.531359282068 LVVA_F7404_US1_GV1380_0002.jpg LVVA_F7404_US1_GV1380_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"420.0 210.0\n10056.0 255.0\n10044.0 7452.0\n390.0 7446.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1380_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1380_0002.vrt LVVA_F7404_US1_GV1380_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1380_0002.cut.vrt LVVA_F7404_US1_GV1380_0002.xyz