#!/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 4494.0 6060.0 21.54192 56.74925833333333 -gcp 40362.0 6174.0 21.583581666666667 56.74925833333333 -gcp 40368.0 39912.0 21.583581666666667 56.72842833333333 -gcp 4470.0 39804.0 21.54192 56.72842833333333 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000756-PLANSETE-012-a-2_0756.JPG LVVA-001679-0217-000756-PLANSETE-012-a-2_0756.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4494.0 6060.0\n40362.0 6174.0\n40368.0 39912.0\n4470.0 39804.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000756-PLANSETE-012-a-2_0756.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000756-PLANSETE-012-a-2_0756.vrt LVVA-001679-0217-000756-PLANSETE-012-a-2_0756.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000756-PLANSETE-012-a-2_0756.cut.vrt LVVA-001679-0217-000756-PLANSETE-012-a-2_0756.xyz