#!/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 26.140508651733 57.414823553702 -gcp 10413.0 0.0 26.23251914978 57.422264919227 -gcp 10413.0 8622.0 26.245136260986 57.381758221017 -gcp 0.0 8622.0 26.153125762939 57.374331762204 LVVA_F7404_US1_GV1000_0002.jpg LVVA_F7404_US1_GV1000_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"372.0 438.0\n10026.0 453.0\n10032.0 7776.0\n486.0 7740.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1000_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1000_0002.vrt LVVA_F7404_US1_GV1000_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1000_0002.cut.vrt LVVA_F7404_US1_GV1000_0002.xyz