Legal Exposure from Coordinate Errors

A comprehensive resource for surveyors, civil engineers, and legal professionals navigating the risks of geodetic inaccuracies.

In This Guide:

Liability Risk Flowchart

Determine your exposure: "Am I at risk of a coordinate error liability claim?" Follow the branches based on your project requirements.

START: Project Definition
Is it for Construction, Aviation, or Property Boundary?
YES ↓
High Stakes Operation
Are Coordinates Unverified or Legacy (NAD27/ED50)?
YES ↓
CRITICAL RISK: High Potential for Claim
NO ↓
Verified Transformation
MANAGED RISK: Standard Duty of Care
NO (General GIS) ↓
Educational / Informational
Are Disclaimers Prominent?
YES ↓
LOW RISK: Information Only
NO ↓
Ambiguous Use Case?
MODERATE RISK: Possible Reliance Claim

Liability Resource Hub

Professional 法的責任ガイド

Real-world failure cases ranging from $25K to $10M+ in exposure. Includes subsea manifold errors and directional drilling collisions.

Explore 事例研究

Datum Error Lawsuit Analysis

Technical breakdown of how datum mismatches (NAD83 vs WGS84) lead to multi-million dollar litigation in offshore and land projects.

Analyze Lawsuits

Survey Negligence Case Law (USA)

Reference of primary legal precedents in the United States regarding surveyor breach of contract and professional negligence.

Review Case Law

Boundary Dispute Liability

Legal consequences of incorrect property line staking. Who is responsible for the removal costs of encroaching structures?

Boundary Risk Guide

Incorrect Property Survey Lawsuit

Step-by-step litigation process when a private property survey contains errors affecting title insurance or resale value.

Litigation Process

Survey Negligence Liability

Understanding the standard of care required for modern geodetic operations and the limits of liability in service contracts.

Negligence Standards

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Quantify your financial exposure before a project begins. Our Risk Calculator uses documented benchmarks to estimate potential litigation costs.

Open Coordinate Error リスクコスト計算

Legal Exposure FAQ

Is my firm liable if I use public coordinate data (e.g. from a State DOT)?
Generally, professionals are responsible for validating external data before applying it to a specific engineering or survey project. Reliance on public data without "verification of fit" is a common source of negligence claims.
What is the typical 'Standard of Care' for coordinate transformations?
The Standard of Care usually requires following industry-standard geodetic practices, such as using EPSG-published parameters and performing 3rd-party validation (e.g. comparing against known benchmarks).
Can a disclaimer on my map prevent all coordinate liability?
Disclaimers help manage "low-stakes" informational risk, but rarely shield against negligence in professional service contracts where a specific duty of care is owed to a client (e.g., construction staking).
専門家による測地検証済み
専門的な測地基準に準拠して検証済み

The $50,000 Geodetic Drift Liability: NAD83 vs WGS84

北米プレートは年間約2cm移動するため、NAD83(2011)とWGS84(G1762)は現在2.2メートル以上乖離しています。 高精度なNAD83地籍杭打ちに「標準的な」GPS WGS84座標を使用したことで、基礎のやり直しやインフラの配置ミスによる5万ドルの専門家責任賠償請求が発生しています。

Risk Exposure Metric: 2.2-Meter Tectonic Drift & Epoch Accumulation
Professional Knowledge Graph:

重要：計算結果の正確性を確認してください

座標精度はデバイスや測地系によって異なります。以下の確認を行わずに実務で使用しないでください：

GPS精度の警告

スマホのGPSは最大30メートルずれることがあります。これが原因でデータに重大なエラーが発生します。

精度を今すぐチェック

測地系のリスク

誤った測地系（例：WGS84と日本測地系）を使用すると、常に数百メートルのズレが生じます。

測地系を確認する