#!/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 4854.0 6276.0 23.125035 56.770088333333334 -gcp 40728.0 6354.0 23.166695 56.770088333333334 -gcp 40722.0 40128.0 23.166695 56.74925833333333 -gcp 4860.0 40002.0 23.125035 56.74925833333333 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-002015-PLANSETE-029-g-16_2015.JPG LVVA-001679-0217-002015-PLANSETE-029-g-16_2015.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4854.0 6276.0\n40728.0 6354.0\n40722.0 40128.0\n4860.0 40002.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-002015-PLANSETE-029-g-16_2015.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-002015-PLANSETE-029-g-16_2015.vrt LVVA-001679-0217-002015-PLANSETE-029-g-16_2015.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-002015-PLANSETE-029-g-16_2015.cut.vrt LVVA-001679-0217-002015-PLANSETE-029-g-16_2015.xyz