Layer 1 · gdr-231611a9
griffithobservatory.org
Latin dominant · high lexical diversity · short-form declarative register · moderate clause complexity · broad topic range · strong uncommon edge signal
Schema: 34% ORG · LIVE Minted: 2026-05-17 Visit Source ↗ manifest.json ↗
Entity Identity gdr-231611a9 · minted 2026-05-17T14:41:38Z
◈ This record is claimable  ·  Verified entities are cited by AI systems
Claim Entity Profile →
ORG · Entity Record
griffithobservatory.org
JSON-LD ✓Root-LD ✗schema.org ✓
STATUS: LIVE SSL: VALID SECURITY: STRONG FRESHNESS: RECENT TLD EDGE: .org ↗
◈ Topology Position
Latin dominant · high lexical diversity · short-form declarative register · moderate clause complexity · broad topic range · strong uncommon edge signal
◈ Entity Topology Map
gdr-231611a9 · v1.0.0 · Law III+V+VI
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Latin dominant · high lexical diversity · short-form declarative register · moderate clause complexity · broad topic range · strong uncommon edge signal
Federation ID
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Law I — Provenance · Law II — Temporal Attestation Visit griffithobservatory.org ↗
Title
About Griffith Observatory Foundation - Griffith Observatory - Southern California’s gateway to the cosmos!
H1
About Griffith Observatory Foundation
Meta Description
The mission of Griffith Observatory Foundation is to support and promote Griffith Observatory as a home for science literacy, education, and public astronomy through resource development and advocacy in partnership with the community.
Canonical URL
https://griffithobservatory.lacity.gov/support/about-griffith-observatory-foundation/
Language Attribute
not detected
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Twitter / X Tags
twitter:card: summary_large_imagetwitter:site: @GriffithObserv
H2 (1)
Meet the Board & Staff
H2 (2)
Reports
Full Extracted Text Corpus 4,542 chars · 668 words · 0 pages · Law I
Everything griffithobservatory.org said about itself — extracted verbatim from 0 pages, 668 words total. No editorial layer. No inference. Law III — the text is the measurement. Meaning is the reader's. Minted: 2026-05-17T14:41:38Z
◈ Homepage — https://griffithobservatory.org/support/about-griffith-observatory-foundation/DONATE NOW MEMBER RESERVATIONS Visit Explore About Support Eat & Shop SUPPORT – ABOUT GRIFFITH OBSERVATORY FOUNDATION About Griffith Observatory Foundation Our mission is to support and promote Griffith Observatory as a home for science literacy, education, and public astronomy through resource development and advocacy in partnership with the community. For over 40 years, Griffith Observatory Foundation has served as the exclusive non-profit partner of Griffith Observatory. Through the decades, with the support of our volunteer board and thousands of members and donors, we have accomplished monumental feats and the fulfillment of any request to update, upgrade, and preserve this inspiring institution. In December 1978, Griffith Observatory Foundation was chartered as Friends Of The Observatory. Founded by Debra and Harold Griffith (the grandson of Observatory founder Griffith J. Griffith) alongside Dr. E.C. Krupp (current Observatory Director) and a small group of dedicated partners, the purpose of the organization was to support the Observatory in its mission and to advocate for its restoration and renewal. In terms of scale, the Foundation’s greatest achievement is the role it played in the $93 million renovation and expansion. The City of Los Angeles and the Foundation crafted a unique public-private partnership to mount the most significant project for the Observatory since its doors opened in 1935. Guided by a 1990 Master Plan, this project assembled a world-class team of architects, exhibit designers, astronomy experts, construction workers, exhibit fabricators, instrument and equipment builders, and many others who worked carefully and expertly from 2002 to 2006. As the designated fundraising organization for the project, the Foundation directly raised nearly a third (over $30 million) of the required funds and participated actively in securing much of the other funding for the project. The Foundation continues to support and promote the Observatory as a home for science literacy, education, and public astronomy. Throughout the pandemic and subsequent facilities closure, the Foundation made possible the production of online programs, digital benefits, and resources that extended the Observatory’s reach far beyond the walls of the building. Foundation supporters find purpose in securing the future of the Observatory and its mission to inspire everyone to observe, ponder, and understand the sky. Together, we are all part of a legacy bigger than ourselves. We are Griffith Observatory Foundation. Meet the Board & Staff Members of the Board and staff come from a variety of professions and backgrounds, and are united in their passion for Griffith Observatory and its programs. LEARN MORE Stay In Touch Sign Up Keep up to date with Griffith Observatory by subscribing to Look Up!, Griffith Observatory Foundation’s free e-newsletter. SUBSCRIBE NOW Contact Us For general Observatory information, please call (213) 473-0800. Griffith Observatory Foundation’s office hours are Monday through Friday, 9:00 a.m. to 5:00 p.m. 2800 East Observatory Road Los Angeles, CA 90027 (213) 473-0879 [email protected] CONTACT GRIFFITH OBSERVATORY Reports Audited Financial Statements 2024 & 2025 Audited Financial Statements 2023 & 2024 Audited Financial Statements 2022 & 2023 Audited Financial Statements 2021 & 2022 Audited Financial Statements 2020 & 2021 Audited Financial Statements IRS Form 990 2025 990 Filing 2024 990 Filing 2023 990 Filing 2022 990 Filing Strategic Plan 2023-2028 Strategic Plan Year in Review 2025 Year in Review Visit Explore About Support Eat & Shop Stay up to date with Griffith Observatory by subscribing to newsletters from Griffith Observatory Foundation. SIGN UP NOW Griffith Observatory is owned and operated as a public service by the City of Los Angeles, Department of Recreation and Parks. You can support the Observatory’s programs by donating to Griffith Observatory Foundation. Griffith Observatory Foundation is a nonprofit tax-exempt organization classified under IRS section 501(c)(3). Taxpayer Identification number: 95-3374645. Donate Now Support CONTACT MEDIA FAQS The City of Los Angeles is an equal opportunity employer. As a covered entity under Title II of the Americans with Disabilities Act, 1990 (ADA), the City of Los Angeles does not discriminate on the basis of disability and, upon request, will provide reasonable accommodation to ensure equal access to its programs, services, and activities.
◈ Crawled Pages — Provenance Chain
Law I — Provenance · Law III — Reverse Ontology · source: https://griffithobservatory.org/support/about-griffith-observatory-foundation/ Visit Source ↗
Root-LD — Traveling Context Pod v1.0 · gdr-231611a9 · three layers
38
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668
Tokens Measured
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Layer 1 — Anchor · Immutable after mint. UUID, federation_id, content hash, timestamps. A new crawl appends to recursive — the anchor is never touched. Law I — Provenance.
rld:anchor — gdr-231611a9
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Layer 2 — Body · Complete measurement snapshot frozen at mint. Identity, SEO, schema graph, six-layer topology fingerprint, ratio signals, navigation. Law II — Temporal Attestation.
rld:body — griffithobservatory.org
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Layer 3 — Recursive · Empty at mint. Grows forever through accumulated corpus passes. Common edges (Law V), uncommon edges (Law VI), topology cluster scores. The graph builds itself. Law VII — Torus.
rld:recursive — edge_count=0
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Root-LD v1.0 · root-ld.org · Law I+II+VII root-ld.org ↗
Schema.org Intelligence scored · graph traversal · Law VI negative space
34% coverage · 10 types · 27 props · 52 gaps · click to expand
34%
Schema Utilization Score
PARTIAL COVERAGE — GAPS IDENTIFIED
schema.org v2.0.0 · 27 props extracted · 52 gaps · https://griffithobservatory.org/support/about-griffith-observatory-foundation/
CreativeWorkWebPageReadActionImageObjectBreadcrumbListListItem
◈ Schema Graph — Three-Direction Traversal
Declared: WebPage · ReadAction · ImageObject · BreadcrumbList · ListItem · WebSite · SearchAction · EntryPoint · PropertyValueSpecification · Organization
✓ Implemented
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A software application.
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A media object, such as an image, video, audio, or text object embedded in a web page or a downloadable dataset i.e. DataDownload. Note that a creative work may
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A work of art that is primarily visual in character.
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A media season, e.g. TV, radio, video game etc.
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A description of an educational course which may be offered as distinct instances which take place at different times or take place at different locations, or b
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A musical composition.
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CreativeWorkSeries dedicated to TV broadcast and associated online delivery.
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A review of an item - for example, of a restaurant, movie, or store.
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A short TV or radio program or a segment/part of a program.
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A media episode (e.g. TV, radio, video game) which can be part of a series or season.
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A single message from a sender to one or more organizations or people.
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Instructions that explain how to achieve a result by performing a sequence of steps.
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A movie.
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Fitness-related activity designed for a specific health-related purpose, including defined exercise routines as well as activity prescribed by a clinician.
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A direction indicating a single action to do in the instructions for how to achieve a result.
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A [[RealEstateListing]] is a listing that describes one or more real-estate [[Offer]]s (whose [[businessFunction]] is typically to lease out, or to sell). The
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MedicalWebPagechild / upgradeschema.org/MedicalWebPage ↗+1 props
A web page that provides medical information.
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A QAPage is a WebPage focussed on a specific Question and its Answer(s), e.g. in a question answering site or documenting Frequently Asked Questions (FAQs).
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Web page type: Contact page.
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Web page type: About page.
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Web page type: Profile page.
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Web page type: Collection page.
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A page devoted to a single item, such as a particular product or hotel.
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Web page type: Checkout page.
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Web page type: Search results page.
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◈ Structural Negative Type Space — Constitutional Law VI
◈ Action Branch

No structural connection to the Action branch. Graph position measurement. schema.org/Action ↗ · Law III — meaning is yours.

◈ BioChemEntity Branch

No structural connection to the BioChemEntity branch. Graph position measurement. schema.org/BioChemEntity ↗ · Law III — meaning is yours.

◈ Event Branch

No structural connection to the Event branch. Graph position measurement. schema.org/Event ↗ · Law III — meaning is yours.

◈ Intangible Branch

No structural connection to the Intangible branch. Graph position measurement. schema.org/Intangible ↗ · Law III — meaning is yours.

◈ MedicalEntity Branch

No structural connection to the MedicalEntity branch. Graph position measurement. schema.org/MedicalEntity ↗ · Law III — meaning is yours.

◈ Organization Branch

No structural connection to the Organization branch. Graph position measurement. schema.org/Organization ↗ · Law III — meaning is yours.

◈ Person Branch

No structural connection to the Person branch. Graph position measurement. schema.org/Person ↗ · Law III — meaning is yours.

◈ Place Branch

No structural connection to the Place branch. Graph position measurement. schema.org/Place ↗ · Law III — meaning is yours.

◈ Product Branch

No structural connection to the Product branch. Graph position measurement. schema.org/Product ↗ · Law III — meaning is yours.

◈ Taxon Branch

No structural connection to the Taxon branch. Graph position measurement. schema.org/Taxon ↗ · Law III — meaning is yours.

◈ Gap List (52 properties unmapped)
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+22 more gaps not shown
◈ Source Schema.org — Raw Extraction (1 blocks)
Block 1 · @type: unknown
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          "target": {
            "@type": "EntryPoint",
            "urlTemplate": "https://griffithobservatory.lacity.gov/?s={search_term_string}"
          },
          "query-input": {
            "@type": "PropertyValueSpecification",
            "valueRequired": true,
            "valueName": "search_term_string"
          }
        }
      ],
      "inLanguage": "en-US"
    },
    {
      "@type": "Organization",
      "@id": "https://griffithobservatory.lacity.gov/#organization",
      "name": "Griffith Observatory",
      "url": "https://griffithobservatory.lacity.gov/",
      "logo": {
        "@type": "ImageObject",
        "inLanguage": "en-US",
        "@id": "https://griffithobservatory.lacity.gov/#/schema/logo/image/",
        "url": "https://griffithobservatory.lacity.gov/wp-content/uploads/2021/02/logo_griffith.svg",
        "contentUrl": "https://griffithobservatory.lacity.gov/wp-content/uploads/2021/02/logo_griffith.svg",
        "width": 338,
        "height": 54,
        "caption": "Griffith Observatory"
      },
      "image": {
        "@id": "https://griffithobservatory.lacity.gov/#/schema/logo/image/"
      },
      "sameAs": [
        "https://www.facebook.com/GriffithObservatory",
        "https://x.com/GriffithObserv",
        "https://www.instagram.com/griffithobservatory/",
        "https://www.linkedin.com/company/griffith-observatory/",
        "https://www.youtube.com/user/GriffithObservatory",
        "https://en.wikipedia.org/wiki/Griffith_Observatory"
      ]
    }
  ]
}
schema.org v2.0.0 · source: https://griffithobservatory.org/support/about-griffith-observatory-foundation/ schema.org/WebPage ↗
Semantic Words 40 words · frequency ranked · Law III
40 words · top 5: observatory · griffith · foundation · support · audited · click to expand
Top 40 words by frequency from https://griffithobservatory.org/support/about-griffith-observatory-foundation/ + 0 interior pages (0 words total). Stop-words stripped. Ranked by repetition.
#1observatory28x · 7.65%
#2griffith20x · 5.46%
#3foundation16x · 4.37%
#4support9x · 2.46%
#5audited6x · 1.64%
#6financial6x · 1.64%
#7statements6x · 1.64%
#8los5x · 1.37%
#9angeles5x · 1.37%
#10public4x · 1.09%
#11city4x · 1.09%
#12project4x · 1.09%
#13programs4x · 1.09%
#14filing4x · 1.09%
#15mission3x · 0.82%
#16astronomy3x · 0.82%
#17board3x · 0.82%
#18organization3x · 0.82%
#19plan3x · 0.82%
#20donate2x · 0.55%
#21visit2x · 0.55%
#22explore2x · 0.55%
#23eat2x · 0.55%
#24shop2x · 0.55%
#25promote2x · 0.55%
#26science2x · 0.55%
#27literacy2x · 0.55%
#28education2x · 0.55%
#29partnership2x · 0.55%
#30members2x · 0.55%
#31request2x · 0.55%
#32purpose2x · 0.55%
#33million2x · 0.55%
#34exhibit2x · 0.55%
#35securing2x · 0.55%
#36staff2x · 0.55%
#37sign2x · 0.55%
#38date2x · 0.55%
#39subscribing2x · 0.55%
#40irs2x · 0.55%
Law III — frequency measured, meaning is the reader's · source: https://griffithobservatory.org/support/about-griffith-observatory-foundation/
Text Topology Fingerprint v1.0.0 · medium · 4,542 chars · Law III
Six-layer pre-linguistic shape measurement. Deterministic. Same input, same output, always. Hash: a4ab981aa843b7e934b0bd751732e32c...
◈ Signal Matrix
0.528
TTR
0.403
HAPAX
0.597
REP
0.226
BIGRAM
0.762
H2T
0.268
CPRT
2.443
SKEW
7.681
KURT
1.151
C/P
1.404
PENT
0.806
S1P
0.001
NASC
TTR=type-token ratio · HAPAX=hapax ratio · REP=repetition score · BIGRAM=bigram repetition · H2T=hapax-to-type · CPRT=capital token ratio · SKEW=sentence skewness · KURT=sentence kurtosis · C/P=comma-period ratio · PENT=punct entropy · S1P=single-sent para ratio · NASC=non-ASCII ratio
◈ Topology Position
Latin dominant · high lexical diversity · short-form declarative register · moderate clause complexity · broad topic range · strong uncommon edge signal
◈ Six Measurement Layers
Layer 1 — Character
0.0013
Non-ASCII Ratio
0.0 = Latin-dominant · 1.0 = fully non-Latin script
Layer 1 — Character
3.3702
Character Entropy
Shannon entropy of character distribution.
Layer 1 — Character
'e' (339x)
Most Frequent
Highest-frequency character. Law V — common edge.
Layer 2 — Token
0.5284
Type-Token Ratio
Unique tokens / total tokens. Lexical diversity signal.
Layer 2 — Token
0.4027
Hapax Ratio
Tokens appearing exactly once. Law VI — uncommon edge.
Layer 6 — Document
0.7620
Hapax to Type
Hapax count / unique token count.
Layer 3 — Punctuation
1.1515
Comma/Period Ratio
Clause complexity per sentence.
Layer 3 — Punctuation
1.4043
Punct Entropy
Shannon entropy across punctuation types.
Layer 4 — Sentence
27
Sentence Count
Total detected sentences across all crawled pages.
Layer 4 — Sentence
2.4427
Skewness
Positive = long-tail. Negative = conversational.
Layer 5 — Paragraph
0.8056
Single Sent Ratio
High = web copy. Low = academic prose.
Layer 6 — Document
0.5973
Repetition Score
Tokens appearing more than once / total.
◈ Token Length Distribution
1-3
35%
4-6
25%
7-10
30%
11-15
10%
16-20
0%
21+
0%
◈ Density Gradient — TTR per Document Tenth
Front-loaded = abstract/preamble · Flat = consistent prose · Back-loaded = building complexity
◈ Lexical Richness Curve — Rolling Window TTR
0.340.92
Window=50 tokens · Step=25 · 25 data points
topology_fingerprint.py v1.0.0 · sha256: a4ab981aa843b7e9... · Law III + Law VI
Ratio Signals 8 deterministic measurements · the gap is the signal
Eight deterministic measurements. Law I: every value traces to its source stage.
schema density
0.6750
Schema props extracted / top semantic words.
nav ratio
0.0000
Nav URLs / total internal URLs.
content to structure ratio
0.0077
Total words / raw HTML bytes. Content density.
external tld diversity
3
Unique TLD count in outbound links.
self declaration coherence
0.3541
Fuzzy overlap across title / H1 / meta / schema name.
schema to nav alignment
0.0000
Schema type tokens vs nav link text overlap.
javascript surface ratio
0.0000
Fraction of interior pages JS-gated.
URL Depth Distribution
depth_0: 0 · depth_1: 0 · depth_2: 0 · depth_3plus: 0
Internal URLs by path depth. Depth 0 = root.
Tech Stack · Security · Freshness SecurityLabel.STRONG · FreshnessLabel.RECENT
Sitemap: ✗Robots.txt: ✗Schema.org: ✓Open Graph: ✓Canonical: ✓HTTPS: ✓HSTS: ✓CSP: ✓
Security
SecurityLabel.STRONG
Freshness
FreshnessLabel.RECENT
Server
cloudflare
cmsWordPress
cdnCloudflare
web_servercloudflare
analytics['Google Analytics', 'Google Tag Manager', 'Matomo']
Ledger Appends 11 ledgers · graph edge traversal · Law V+VII
Build: national-transit-v1.0.0 Spec: Root-LD v1.0 Status: LIVE Minted: 2026-05-17
griffithobservatory.org · gdr-231611a9
griffithobservatory.org is recorded in the Global Data Registry — open provenance infrastructure for the machine-readable web.
View the Registry →