#!/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 5046.0 5796.0 21.50026 57.290835 -gcp 40410.0 6288.0 21.54192 57.290835 -gcp 40074.0 40086.0 21.54192 57.270005 -gcp 4674.0 39582.0 21.50026 57.270005 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000623-PLANSETE-009-g-9_0623.JPG LVVA-001679-0217-000623-PLANSETE-009-g-9_0623.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "5046.0 5796.0\n40410.0 6288.0\n40074.0 40086.0\n4674.0 39582.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000623-PLANSETE-009-g-9_0623.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000623-PLANSETE-009-g-9_0623.vrt LVVA-001679-0217-000623-PLANSETE-009-g-9_0623.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000623-PLANSETE-009-g-9_0623.cut.vrt LVVA-001679-0217-000623-PLANSETE-009-g-9_0623.xyz