#!/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 4884.0 5322.0 21.416938333333334 57.311665 -gcp 40224.0 5418.0 21.458598333333335 57.311665 -gcp 40236.0 39210.0 21.458598333333335 57.290835 -gcp 4860.0 39102.0 21.416938333333334 57.290835 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000003-PLANSETE-002-i-7_0003.JPG LVVA-001679-0217-000003-PLANSETE-002-i-7_0003.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4884.0 5322.0\n40224.0 5418.0\n40236.0 39210.0\n4860.0 39102.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000003-PLANSETE-002-i-7_0003.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000003-PLANSETE-002-i-7_0003.vrt LVVA-001679-0217-000003-PLANSETE-002-i-7_0003.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000003-PLANSETE-002-i-7_0003.cut.vrt LVVA-001679-0217-000003-PLANSETE-002-i-7_0003.xyz