#!/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 24.939479827881 57.797303522885 -gcp 14898.0 0.0 25.076637268066 57.809285558625 -gcp 14898.0 14388.0 25.107021331787 57.738524839202 -gcp 0.0 14388.0 24.963512420654 57.723265213279 LVVA_F7404_US1_GV527_0002.jpg LVVA_F7404_US1_GV527_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"537.0 6204.0\n978.0 6189.0\n984.0 450.0\n9999.0 591.0\n9999.0 1203.0\n14352.0 1308.0\n14238.0 13521.0\n468.0 13368.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV527_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV527_0002.vrt LVVA_F7404_US1_GV527_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV527_0002.cut.vrt LVVA_F7404_US1_GV527_0002.xyz