rgdal

rgdal is a skill for Claude Code, Codex from LeoLin990405/r-analytics-skill. It costs 28 tokens per session (306 once invoked), scanned A, original, MIT.

An R package that connected older spatial-data code to GDAL, a library for reading and writing many geographic file formats. It was retired in 2023 and replaced mainly by sf and terra.

In plain words
What is it for?
Use it to understand migrations from shapefile and raster import/export functions, CRS definitions, and coordinate transformations.
Why use it?
It helps maintain older geospatial R scripts and translate their file-reading, coordinate-system, and projection code to current packages.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to understand migrations from shapefile and raster import/export functions, CRS definitions, and coordinate transformations.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/leolin990405/r-analytics-skill/rgdal
Install

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.

Any agent
npx skills add LeoLin990405/r-analytics-skill --skill rgdal
Clone the repo
git clone --depth 1 https://github.com/LeoLin990405/r-analytics-skill

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for rgdal

README.md
[![agentmods](https://agentmods.dev/badge/skills/leolin990405/r-analytics-skill/rgdal/github.svg)](https://agentmods.dev/skills/leolin990405/r-analytics-skill/rgdal)
Your own site
<a href="https://agentmods.dev/skills/leolin990405/r-analytics-skill/rgdal"><img src="https://agentmods.dev/badge/skills/leolin990405/r-analytics-skill/rgdal/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.

agentmods 80×15 button for rgdal

Your own site · 80×15
<a href="https://agentmods.dev/skills/leolin990405/r-analytics-skill/rgdal"><img src="https://agentmods.dev/badge/skills/leolin990405/r-analytics-skill/rgdal.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 306 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00028 $0.00306
Opus 5 $0.00014 $0.00153
Sonnet 5 $0.00006 $0.00061
Haiku 4.5 $0.00003 $0.00031

Measured 9d ago against content hash bbca251e8d63, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

rgdal 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 9d 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.

sub-skills/r-spatial/r-spatial-vector/rgdal/SKILL.md · 61 lines

What it actually says

rgdal

Bindings for GDAL/OGR (deprecated - use sf or terra).

Note

rgdal was retired in October 2023. Use sf or terra instead.

Migration to sf

# Old rgdal way
library(rgdal)
shp <- readOGR("data.shp")
writeOGR(shp, "output.shp", layer = "data", driver = "ESRI Shapefile")

# New sf way
library(sf)
shp <- st_read("data.shp")
st_write(shp, "output.shp")

Migration to terra

# Old rgdal way
library(rgdal)
raster <- readGDAL("raster.tif")

# New terra way
library(terra)
raster <- rast("raster.tif")

CRS Handling

# Old way
proj4string(sp_obj) <- CRS("+proj=longlat +datum=WGS84")
spTransform(sp_obj, CRS("+proj=utm +zone=10"))

# New sf way
st_crs(sf_obj) <- 4326
st_transform(sf_obj, 32610)

Available Drivers

# In sf
st_drivers()

# In terra
gdal(drivers = TRUE)
Changes

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.

  1. 9d ago First seen · 61 lines · 28 tokens per session scan A bbca251e8d63

Subscribe to this mod's changes

rgdal is a skill published in the GitHub repository LeoLin990405/r-analytics-skill (5 stars, last pushed 6mo ago), licensed MIT. It adds 28 tokens to every session and 306 once invoked, about $0.0001 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 2026-09-03.

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