For a .txt file containing geographic or elevation data for the Netherlands, reviewers typically look for:

For developers, a good review focuses on how well the file supports Natural Language Processing (if it's a corpus) or predictive modeling (if it's environmental data). 2. Accessing Text Corpora and Lexical Resources - NLTK

Does the file cover the entire country or just specific flood-prone regions?

If you are reviewing this file for a project, consider these three pillars:

Is the data structured (e.g., CSV-style within the text) or raw natural language?