#!/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 25.929622650146 56.905112600643 -gcp 10701.0 0.0 26.037940979004 56.913032096354 -gcp 10701.0 8718.0 26.050472259521 56.86398859052 -gcp 0.0 8718.0 25.940093994141 56.855589416956 LVVA_F7404_US1_GV1096_0002.jpg LVVA_F7404_US1_GV1096_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"501.0 528.0\n10257.0 684.0\n10146.0 7896.0\n447.0 7743.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1096_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1096_0002.vrt LVVA_F7404_US1_GV1096_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1096_0002.cut.vrt LVVA_F7404_US1_GV1096_0002.xyz