How Datum Shifts Cause Expensive Boundary Disputes の座標変換

Technical Summary: Legal analysis on how ignoring coordinate system updates leads to structural encroachments and professional liability claims.
実務リスク警告

誤った測地系（データム）の指定や、グリッド・地上補正（Grid-to-Ground）を適用しない座標変換は、1〜400mの位置ズレを引き起こします。これは測量過失請求や施工紛争の代表的な原因です。

技術事例・判例を見る 契約上の測地系リスク リスク試算シミュレーター

When civil engineers and architects draft site plans, they assume the CAD lines correspond perfectly to the physical dirt on the job site. However, if the CAD file was drafted in State Plane NAD83(1986) but the surveyor stakes the building using modern GNSS WGS84, the blueprints will physically shift.

The Cost of Encroachment

If a commercial building is built utilizing the incorrect datum assumption, it may unknowingly cross a boundary setback line or even infringe onto a neighboring property. Correcting an active construction error of this magnitude easily scales into the hundreds of thousands of dollars in litigation, delay damages, and physical tear-down costs.

Verify Coordinates with Core ツール一覧

Always validate your site data before mobilizing construction or legal teams. Use our built-in coordinate converters to rule out fundamental geodetic errors:

よくある技術的な質問

Who is liable for a datum shift engineering error?

Usually, liability falls on the Licensed Surveyor or Professional Engineer who stamped the final site plan or staked the property. It is generally considered professional negligence to fail to define and adhere to a unified coordinate management plan.