#!/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 5058.0 6126.0 22.791748333333334 57.082535 -gcp 40590.0 6300.0 22.833408333333335 57.082535 -gcp 40536.0 40032.0 22.833408333333335 57.061706666666666 -gcp 4962.0 39846.0 22.791748333333334 57.061706666666666 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-001451-PLANSETE-023-h-4_1451.JPG LVVA-001679-0217-001451-PLANSETE-023-h-4_1451.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5058.0 6126.0\n40590.0 6300.0\n40536.0 40032.0\n4962.0 39846.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-001451-PLANSETE-023-h-4_1451.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-001451-PLANSETE-023-h-4_1451.vrt LVVA-001679-0217-001451-PLANSETE-023-h-4_1451.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-001451-PLANSETE-023-h-4_1451.cut.vrt LVVA-001679-0217-001451-PLANSETE-023-h-4_1451.xyz