tammojan / lofargeotiff

LOFAR GeoTIFF writer

LOFAR GeoTIFF

This package provides a simple function to write LOFAR near field images as a GeoTIFF file. This makes sure that some metadata is kept, in particular the location of the image.

Installation

pip install lofargeotiff

Usage

Using as input a two-dimensional numpy array of pixel values, and the PQ coordinates of the (center of the) lower left and upper right pixel, the following command writes a GeoTIFF:

from lofargeotiff import write_geotiff
import numpy as np

data = np.random.rand(400, 400)
lowerleft = (-200, -200)
upperright = (200, 200)

write_geotiff(data, "test.tif", lowerleft, upperright,
              obsdate="2016-02-12 08:00:00",
              tags={"Author": "Tammo Jan Dijkema",
                    "Project": "EOR"})

The resulting file can be read back into python using rasterio.open, or any other package that reads TIFF. The metadata can be inspected on the command line with exiftool.

Also, the resulting GeoTIFF files can be viewed in the online viewer https://geotiff.io . See this example.