#!/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 0.0 0.0 24.33339736956058 58.429840981345066 -gcp 30474.0 0.0 28.761332671095357 58.54192935036816 -gcp 30474.0 38976.0 28.522410802615532 55.571629311721004 -gcp 0.0 38976.0 24.495560698428285 55.610976282842685 Latv.Lietuv.Prus.Baltk.Kriev.Igaun.top.kartes_Latvijas_top._karte_6828_A1_L57_04.JPG Latv.Lietuv.Prus.Baltk.Kriev.Igaun.top.kartes_Latvijas_top._karte_6828_A1_L57_04.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "14007.0 6140.286229872293\n13941.0 1121.930038867296\n2049.0 707.953359244864\n882.0 38973.0\n29148.0 38973.0\n28932.0 33063.156579677954\n28839.0 33072.07995558024\n28602.0 25428.03248195447\n28077.0 6060.0" | \
  gdaltransform -tps -output_xy Latv.Lietuv.Prus.Baltk.Kriev.Igaun.top.kartes_Latvijas_top._karte_6828_A1_L57_04.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Latv.Lietuv.Prus.Baltk.Kriev.Igaun.top.kartes_Latvijas_top._karte_6828_A1_L57_04.vrt Latv.Lietuv.Prus.Baltk.Kriev.Igaun.top.kartes_Latvijas_top._karte_6828_A1_L57_04.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Latv.Lietuv.Prus.Baltk.Kriev.Igaun.top.kartes_Latvijas_top._karte_6828_A1_L57_04.cut.vrt Latv.Lietuv.Prus.Baltk.Kriev.Igaun.top.kartes_Latvijas_top._karte_6828_A1_L57_04.xyz