#!/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 4926.0 5742.0 21.625241666666668 57.45747333333333 -gcp 40128.0 5808.0 21.666903333333334 57.45747333333333 -gcp 40164.0 39594.0 21.666903333333334 57.436643333333336 -gcp 4956.0 39516.0 21.625241666666668 57.436643333333336 LVVA_F1679_US217_GV1-4373/LVVA-001679-0217-000563-PLANSETE-009-a-12_0563.JPG LVVA-001679-0217-000563-PLANSETE-009-a-12_0563.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4926.0 5742.0\n40128.0 5808.0\n40164.0 39594.0\n4956.0 39516.0" | \
  gdaltransform -tps -output_xy LVVA-001679-0217-000563-PLANSETE-009-a-12_0563.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LVVA-001679-0217-000563-PLANSETE-009-a-12_0563.vrt LVVA-001679-0217-000563-PLANSETE-009-a-12_0563.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA-001679-0217-000563-PLANSETE-009-a-12_0563.cut.vrt LVVA-001679-0217-000563-PLANSETE-009-a-12_0563.xyz