iso gps

EXECUTIVE SUMMARY

Scope: geographic information — coordinate-based positioning services (地理信息 基于坐标的定位服务), a service/interface data-model standard, NOT a GPS hardware standard. Both GB/T 27668 and ISO 19116 sit at the same tier (service interface), so comparison is valid. Critical finding: the official Chinese authority lists GB/T 27668-2023 as CURRENT with title 显微镜 光学显微术术语 (Microscopes — Vocabulary for optical microscopy) — a title that does NOT match the positioning-service scope; the positioning-service designation must be verified before any procurement reliance.

APPLICABLE CHINESE STANDARDS

⚠️ Number collision: GB/T 27668 is assigned by the official register to optical-microscopy vocabulary. The positioning-service standard number cited by both AI drafts cannot be confirmed. Do not procure against "GB/T 27668-2011" until the correct designation is confirmed.

STANDARD TIER CLASSIFICATION

FLAG: Both drafts correctly note this is NOT a hardware standard. GPS receiver sensitivity/antenna gain are out of scope — those require different standards.

SCOPE BREAKDOWN

Positioning service data model

Chinese standard: GB/T 27668 (designation unverified): 地理信息 基于坐标的定位服务 (Geographic information — Coordinate-based positioning services)

International equivalent: ISO 19116:2019 — Geographic information — Positioning services — 2nd edition (supersedes ISO 19116:2004)

Equivalence: MOD (Modified) — GB/T aligned to ISO 19116:2004, not the 2019 edition

Standard tier match: Both TIER 1 — valid comparison

Parameter comparison table:

⚠️ No numeric values are asserted — neither draft produced verifiable clause-level figures. All parameters require official text confirmation.

KEY DIFFERENCES SUMMARY

• Edition gap — GB/T aligned to ISO 19116:2004; ISO now at 2019. Deviation: one full edition. 附加测试后互认 (Mutual recognition after additional testing). Impact: HIGH.
• Standard number integrity — official register assigns GB/T 27668-2023 to optical microscopy. 不可互认 (Not mutually recognised) until designation confirmed. Impact: HIGH.
• Quality model structure — 2019 edition revised positioning quality elements. 附加测试后互认 (Mutual recognition after additional testing). Impact: HIGH.
• Hardware scope — neither standard covers GPS receiver hardware. Impact: HIGH if hardware procurement intended.

REGULATORY LINKAGE TABLE (法规联动)

AUDIT FLAG RESOLUTION

• 🔴 CRITICAL CORRECTION: GB/T 27668-2023 is officially titled 显微镜 光学显微术术语 (Microscopes — Vocabulary for optical microscopy) and is CURRENT. The positioning-service title cited by both drafts does NOT match the official register. The correct designation for the positioning-service standard must be verified before procurement.
• ✅ RESOLVED: ISO 19116:2019 is the 2nd edition, superseding ISO 19116:2004 — both drafts agree.
• ✅ RESOLVED: Both drafts agree GB/T is MOD-aligned to the 2004 edition, not 2019.
• ⚠️ UNRESOLVED: All clause-level numeric values — verify against official texts.
• ✅ FALSE POSITIVE (domain flag): GB/T 23707/23708/23709 usage is valid — these are legitimate ISO 19100-series adoptions supporting the positioning data model.

PROCUREMENT VERDICT

• Verify the correct GB/T designation for positioning services against std.samr.gov.cn before citing it in any contract.
• Confirm whether procurement intent is service interface or GPS hardware — if hardware, this comparison is inapplicable.
• Obtain official texts of both standards to confirm clause-level parameters.
• If ISO 19116:2019 compliance is required, treat GB/T alignment as 2004-based — budget for additional testing.
• Do not accept "GB/T 27668-2011" on a certificate without cross-checking the official register.

REFERENCE DOCUMENT CHECKLIST (配套调阅清单)

• GB/T 27668 (correct designation) § foreword — confirm ISO edition adopted
• GB/T 27668 § quality elements — confirm accuracy reporting clauses
• ISO 19116:2019 § scope and quality model — confirm 2019 revisions
• ISO 19116:2019 § metadata — confirm structure

FIELD INSPECTION CHECKLIST

• Confirm standard number on supplier documentation matches official register.
• Verify edition year cited (2004 vs 2019 alignment).
• Confirm whether deliverable is data/service or physical device.
• Check accuracy-reporting format against contract specification.

CONFIDENCE RATING

🔴 LOW — key standard designation disputed (official register conflicts with both AI drafts); no clause-level numeric values verified. Consult specialist before procurement.

Technical comparison report — CN Quality Check Standards Tool. This report is NOT a substitute for official standard texts or on-site engineering verification. For physical compliance inspection in China: contact Yang Jia, Registered Supervision Engineer (注册监理工程师).