#!/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 1833.0 2611.7521008403364 24 56.5 -gcp 16355.278160532354 2655.026152268053 24.5 56.5 -gcp 16396.5 16107.273109243697 24.5 56.25 -gcp 1816.5 16078.683193277311 24 56.25 Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Bauska_6828_A1_L25_39_02.JPG Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Bauska_6828_A1_L25_39_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1833.0 2611.7521008403364\n16355.278160532354 2655.026152268053\n16396.5 16107.273109243697\n1816.5 16078.683193277311\" | \
  gdaltransform -tps -output_xy Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Bauska_6828_A1_L25_39_02.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Bauska_6828_A1_L25_39_02.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Bauska_6828_A1_L25_39_02.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Bauska_6828_A1_L25_39_02.cut.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Bauska_6828_A1_L25_39_02.xyz