#!/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 25.836925506592 57.849592789445 -gcp 15060.0 0.0 25.995283126831 57.862014044216 -gcp 15060.0 12402.0 26.010818481445 57.80045948321 -gcp 0.0 12402.0 25.855464935303 57.787056183721 LVVA_F7404_US1_GV1255_0002.jpg LVVA_F7404_US1_GV1255_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"552.0 4146.0\n5469.0 4128.0\n6042.0 3873.0\n6013.125 905.25\n10032.0 792.0\n10086.375 8234.25\n14157.0 8251.5\n14156.25 11463.75\n7367.25 11411.25\n552.0 11415.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1255_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1255_0002.vrt LVVA_F7404_US1_GV1255_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1255_0002.cut.vrt LVVA_F7404_US1_GV1255_0002.xyz