AgentSkillsCN

CRS Sanity Check

在分析前，务必对坐标系、单位以及重投影假设进行验证。

SKILL.md
--- frontmatter
id: crs-sanity-check
name: CRS Sanity Check
description: Validate coordinate systems, units, and reprojection assumptions before analysis.

CRS Sanity Check

When To Use

  • •Use before any overlay, buffer, distance, or area operation.
  • •Use when data comes from multiple providers or mixed formats.
  • •Use when coordinate metadata is missing or contradictory.

Workflow

  1. •Inspect declared CRS for every input layer.
  2. •Confirm axis order and unit assumptions.
  3. •Identify a shared analysis CRS and justify it.
  4. •Reproject inputs only once to the selected CRS.
  5. •Validate extents and spot-check coordinates after reprojection.

Guardrails

  • •Do not compute distance or area in geographic degrees unless explicitly intended.
  • •Do not proceed when CRS metadata is absent without an explicit fallback strategy.
  • •Record original CRS and transformation choices in the final output notes.