pypsa-meets-earth/pypsa-earth

Increase clarity of cutout mismatch messaging

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#1,853 opened on Jun 4, 2026

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good first issuehelp wantedinterfaces

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Description

Describe the feature you'd like to see

We still have check_cutout_match function which throws an error if the cutout doesn't correspond to the area of the requested countries. That is very helpful to support debugging. We have found however that it may be not obvious to understand what exactly is wrong with a cutout you provided given the need to explore nc file which require some additional skills to deal with. It could be a good idea to provide more details on specific discrepancies in the cutout provides.

The simplest solution could be add a comparison between the cutout and the country coordinates.

Contributor guide

Research direction
Examine the `check cutout match` function in the codebase to understand how cutout coordinates are validated. Then implement a comparison that prints detailed discrepancies, such as differences in bounding box or area coverage, between the cutout and the requested country coordinates.
Tech stack
python
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
Python
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60