#!/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 5124.0 6510.0 27.716065 56.77842 -gcp 41082.0 6378.0 27.724398333333333 56.77842 -gcp 41172.0 39234.0 27.724398333333333 56.774253333333334 -gcp 5160.0 39372.0 27.716065 56.774253333333334 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-003753-PLANSETE-102-h-10-XVII_3753.JPG LVVA-001679-0217-003753-PLANSETE-102-h-10-XVII_3753.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5124.0 6510.0\n41082.0 6378.0\n41172.0 39234.0\n5160.0 39372.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-003753-PLANSETE-102-h-10-XVII_3753.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-003753-PLANSETE-102-h-10-XVII_3753.vrt LVVA-001679-0217-003753-PLANSETE-102-h-10-XVII_3753.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-003753-PLANSETE-102-h-10-XVII_3753.cut.vrt LVVA-001679-0217-003753-PLANSETE-102-h-10-XVII_3753.xyz