#!/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 25.280828475952 57.626057746118 -gcp 9252.0 0.0 25.294218063354 57.582187902299 -gcp 9252.0 20919.0 25.07698059082 57.564146370635 -gcp 0.0 20919.0 25.059814453125 57.608865604328 LVVA_F7404_US1_GV2124_0002.jpg LVVA_F7404_US1_GV2124_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"705.0 4983.0\n617.25 526.5\n8379.0 504.0\n8488.5 4948.5\n8553.0 9907.5\n778.5 10048.5\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV2124_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV2124_0002.vrt LVVA_F7404_US1_GV2124_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV2124_0002.cut.vrt LVVA_F7404_US1_GV2124_0002.xyz