#!/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 25.259456634521 57.271665123136 -gcp 5793.0 0.0 25.315074920654 57.273915692595 -gcp 5793.0 6657.0 25.317993164063 57.239980148204 -gcp 0.0 6657.0 25.262160301208 57.23772750491 LVVA_F7404_US1_GV1996_0002.jpg LVVA_F7404_US1_GV1996_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"660.0 2298.0\n5232.0 2292.0\n5274.0 5748.0\n649.5 5751.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1996_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1996_0002.vrt LVVA_F7404_US1_GV1996_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1996_0002.cut.vrt LVVA_F7404_US1_GV1996_0002.xyz