#!/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 2280.0 3528.0 26.482372 55.7063545 -gcp 19950.0 3648.0 26.514185333333334 55.70649866666667 -gcp 19878.0 17232.0 26.514371333333333 55.6930265 -gcp 2241.0 17106.0 26.482569 55.69288233333333 Latvijas_Republikas_un_Polijas_Republikas_robezas_plans_F6828_A1_L1_64.JPG Latvijas_Republikas_un_Polijas_Republikas_robezas_plans_F6828_A1_L1_64.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2280.0 3528.0\n19950.0 3648.0\n19878.0 17232.0\n2241.0 17106.0" | \
  gdaltransform -tps -output_xy Latvijas_Republikas_un_Polijas_Republikas_robezas_plans_F6828_A1_L1_64.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Latvijas_Republikas_un_Polijas_Republikas_robezas_plans_F6828_A1_L1_64.vrt Latvijas_Republikas_un_Polijas_Republikas_robezas_plans_F6828_A1_L1_64.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Latvijas_Republikas_un_Polijas_Republikas_robezas_plans_F6828_A1_L1_64.cut.vrt Latvijas_Republikas_un_Polijas_Republikas_robezas_plans_F6828_A1_L1_64.xyz