#!/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 693.0 735.0 23.5 57 -gcp 5409.0 756.0 24.166666666666668 57 -gcp 5418.0 5100.0 24.166666666666668 56.666666666666664 -gcp 666.0 5073.0 23.5 56.666666666666664 2_izdevums/19_Jurmala.jpg 19_Jurmala.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "690.0 732.0\n663.0 5074.311563020544\n5424.375263527758 5102.812395891171\n5411.437104708362 754.313228761799" | \
  gdaltransform -tps -output_xy 19_Jurmala.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  19_Jurmala.vrt 19_Jurmala.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 19_Jurmala.cut.vrt 19_Jurmala.xyz