crs-management

A coordinate reference system defines how coordinates relate to locations on Earth.

Skills
Scientific
0

What it does and how to use it

A skill that teaches Claude Code to do scientific tasks well. It is packaged knowledge the model uses whenever it is relevant.

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Install (Claude Code)

mkdir -p .claude/skills/crs-management && curl -fsSL https://doutorai.pt/data/lib/skills__crs-management.md -o .claude/skills/crs-management/SKILL.md

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

# Coordinate Reference Systems (CRS)

A coordinate reference system defines how coordinates relate to locations on Earth.

## Understanding CRS

CRS information is stored as `pyproj.CRS` objects:

```python
# Check CRS
print(gdf.crs)

# Check if CRS is set
if gdf.crs is None:
    print("No CRS defined")
```

## Setting vs Reprojecting

### Setting CRS

Use `set_crs()` when coordinates are correct but CRS metadata is missing:

```python
# Set CRS (doesn't transform coordinates)
gdf = gdf.set_crs("EPSG:4326")
gdf = gdf.set_crs(4326)
```

**Warning**: Only use when CRS metadata is missing. This d

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