#!/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 6732.0 7560.0 27.54109 56.35349 -gcp 43002.0 7554.0 27.56192 56.35349 -gcp 42978.0 40242.0 27.56192 56.343075 -gcp 6678.0 40254.0 27.54109 56.343075 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-004337-PLANSETE-104-d-14-I_4337.JPG LVVA-001679-0217-004337-PLANSETE-104-d-14-I_4337.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "6732.0 7560.0\n43002.0 7554.0\n42978.0 40242.0\n6678.0 40254.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-004337-PLANSETE-104-d-14-I_4337.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-004337-PLANSETE-104-d-14-I_4337.vrt LVVA-001679-0217-004337-PLANSETE-104-d-14-I_4337.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-004337-PLANSETE-104-d-14-I_4337.cut.vrt LVVA-001679-0217-004337-PLANSETE-104-d-14-I_4337.xyz