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 znlgis/opengis-skills --skill postgisgit clone --depth 1 https://github.com/znlgis/opengis-skillsWrote 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/znlgis/opengis-skills/postgis)<a href="https://agentmods.dev/skills/znlgis/opengis-skills/postgis"><img src="https://agentmods.dev/badge/skills/znlgis/opengis-skills/postgis/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/znlgis/opengis-skills/postgis"><img src="https://agentmods.dev/badge/skills/znlgis/opengis-skills/postgis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Privilege Escalation · line 43 Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
- medium Privilege Escalation · line 46 Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
- medium MCP Rug Pull · line 52 Docker image references without a specific tag (:latest is implicit) or digest (@sha256:...) can be silently replaced by a malicious image.Fix: Pin the image: image:tag or image@sha256:abc123
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 | $0.00055 | $0.02547 |
| Opus 5 | $0.00028 | $0.01273 |
| Sonnet 5 | $0.00011 | $0.00509 |
| Haiku 4.5 | $0.00006 | $0.00255 |
Grade B, and why
postgis scanned grade B with 1 finding 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 yesterday.
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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
sudo apt install postgresql-17-postgis-3 postgresql-17-postgis-3-scripts How it starts
The opening of the file, as written. The whole thing — 252 lines — stays where its author put it; the contents beside it link to each section on GitHub.
项目地址: https://github.com/postgis/postgis
官方文档: https://postgis.net/docs/
许可证: GPL-2.0+
概述
PostGIS 是基于 PostgreSQL 的开源空间数据库扩展,遵循 OGC Simple Features for SQL 规范。核心能力:
- 空间数据类型:
geometry(平面)、geography(球面)、raster、topology、3DZ/4DZM - 空间索引:基于 R-Tree-over-GiST,亿级要素仍保持毫秒级查询
- 1000+ 空间函数:覆盖度量、关系、构造、聚合、栅格代数
- 坐标参考系:内置 6000+ EPSG 投影,自动 ST_Transform
- 数据导入导出:与 GDAL/ogr2ogr/shp2pgsql 无缝集成
版本要求: PostgreSQL 12–17 配合 PostGIS 3.x(最新稳定版 3.6.4,3.7 处于 RC 阶段);GEOS ≥ 3.8(部分新算子需 GEOS ≥ 3.14)
环境准备
安装
# Debian/Ubuntu
sudo apt install postgresql-17-postgis-3 postgresql-17-postgis-3-scripts
# CentOS/RHEL
sudo yum install postgis34_17
# macOS
brew install postgis
# Docker(推荐,标签格式 <PG 主版本>-<PostGIS 主版本>)
docker run --name pg -e POSTGRES_PASSWORD=pg -p 5432:5432 -d postgis/postgis:17-3.6
启用扩展
CREATE EXTENSION postgis;
CREATE EXTENSION postgis_topology; -- 拓扑(可选)
CREATE EXTENSION postgis_raster; -- 栅格(可选)
CREATE EXTENSION postgis_sfcgal; -- 3D 高级运算(可选)
SELECT PostGIS_Full_Version(); -- 验证
核心数据类型
| 类型 | 说明 | 适用场景 |
|---|---|---|
geometry(Point, 4326) |
平面几何,速度快 | 投影坐标系下的常规分析 |
geography(Point, 4326) |
球面几何,距离按米 | 全球范围、跨经线计算 |
raster |
栅格 | DEM、影像 |
建表与索引
CREATE TABLE poi (
id SERIAL PRIMARY KEY,
name TEXT,
geom geometry(Point, 4326)
);
CREATE INDEX poi_geom_idx ON poi USING GIST (geom);
INSERT INTO poi(name, geom) VALUES
('天安门', ST_GeomFromText('POINT(116.397 39.908)', 4326)),
('外滩', ST_SetSRID(ST_MakePoint(121.490, 31.241), 4326));
ANALYZE poi;
常用空间 SQL
1. 空间关系
-- 范围查询:&& 走 GiST 索引
SELECT id, name FROM poi
WHERE geom && ST_MakeEnvelope(116, 39, 117, 40, 4326)
AND ST_Within(geom, ST_MakeEnvelope(116, 39, 117, 40, 4326));
-- KNN:<-> 走索引
SELECT id, name, geom <-> ST_MakePoint(116.4, 39.9)::geometry AS d
FROM poi ORDER BY d LIMIT 10;
-- 5 公里缓冲区内
SELECT * FROM poi
WHERE ST_DWithin(geom::geography, ST_MakePoint(116.4, 39.9)::geography, 5000);
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.
- yesterday Changed f1ae08aa338a
- 8d ago First seen · 252 lines · 55 tokens per session scan B 4d4ef02f5f61
postgis is a skill published in the GitHub repository znlgis/opengis-skills (60 stars, last pushed 2d ago), licensed MIT. It adds 55 tokens to every session and 2,547 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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