Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Impertio-Studio/QGIS-Claude-Skill-Package --skill qgis-core-coordinate-systemsgit clone --depth 1 https://github.com/Impertio-Studio/QGIS-Claude-Skill-PackageWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/impertio-studio/qgis-claude-skill-package/qgis-core-coordinate-systems)<a href="https://agentmods.dev/skills/impertio-studio/qgis-claude-skill-package/qgis-core-coordinate-systems"><img src="https://agentmods.dev/badge/skills/impertio-studio/qgis-claude-skill-package/qgis-core-coordinate-systems/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/impertio-studio/qgis-claude-skill-package/qgis-core-coordinate-systems"><img src="https://agentmods.dev/badge/skills/impertio-studio/qgis-claude-skill-package/qgis-core-coordinate-systems.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00097 | $0.02811 |
| Opus 5 | $0.00048 | $0.01406 |
| Sonnet 5 | $0.00019 | $0.00562 |
| Haiku 4.5 | $0.00010 | $0.00281 |
Grade A, and why
qgis-core-coordinate-systems scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 303 lines — stays where its author put it; the contents beside it link to each section on GitHub.
qgis-core-coordinate-systems
Quick Reference
Core CRS Classes
| Class | Purpose | Key Methods |
|---|---|---|
QgsCoordinateReferenceSystem |
Represents a spatial reference system | isValid(), authid(), isGeographic(), mapUnits() |
QgsCoordinateTransform |
Transforms coordinates between two CRS | transform(), transformBoundingBox() |
QgsCoordinateTransformContext |
Project-level datum transformation settings | Used as parameter for transforms |
QgsDistanceArea |
Measures distances and areas in any CRS | measureLine(), measureArea(), setEllipsoid() |
CRS Creation Methods
| Input Format | Constructor Syntax | Example |
|---|---|---|
| EPSG code | QgsCoordinateReferenceSystem("EPSG:<code>") |
"EPSG:4326" |
| PostGIS SRID | QgsCoordinateReferenceSystem("POSTGIS:<srid>") |
"POSTGIS:4326" |
| Internal ID | QgsCoordinateReferenceSystem("INTERNAL:<srsid>") |
"INTERNAL:3452" |
| Proj string | QgsCoordinateReferenceSystem("PROJ:<proj>") |
"PROJ:+proj=longlat +datum=WGS84" |
| WKT string | QgsCoordinateReferenceSystem("WKT:<wkt>") |
"WKT:GEOGCS[...]" |
CRS Property Methods
| Method | Returns | Description |
|---|---|---|
authid() |
str |
Authority identifier, e.g., "EPSG:4326" |
description() |
str |
Human-readable name, e.g., "WGS 84" |
isValid() |
bool |
Whether the CRS was successfully created |
isGeographic() |
bool |
True for geographic CRS (degrees), False for projected (meters) |
mapUnits() |
Qgis.DistanceUnit |
Unit enumeration for the CRS |
toProj() |
str |
Full Proj string representation |
toWkt() |
str |
Full WKT string representation |
postgisSrid() |
int |
PostGIS SRID value |
srsid() |
int |
QGIS internal ID |
projectionAcronym() |
str |
Projection type, e.g., "longlat" |
ellipsoidAcronym() |
str |
Ellipsoid identifier, e.g., "EPSG:7030" |
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 303 lines · 97 tokens per session scan A 0ace8b132af3
qgis-core-coordinate-systems is a skill published in the GitHub repository Impertio-Studio/QGIS-Claude-Skill-Package (33 stars, last pushed 2mo ago), licensed MIT. It adds 97 tokens to every session and 2,811 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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