# Statutory Verification, Calculator Test Execution & Evidence Register

**Portal:** BhulekhNaksha.org
**Revision:** Release Revision 22
**Effective Date:** 31 October 2026
**Review Desk:** Bhulekh Naksha Civic Land Documentation & Revenue Research Desk
**Lead Researcher:** Rishu Viswakarma
**Jurisdictions Covered:** All 28 States and 8 Union Territories of the Republic of India

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## 1. Statutory Authority and Primary Source Register

This register documents the governing statutory enactments, primary official portal endpoints, and legal scope verified for every citizen utility and state directory on BhulekhNaksha.org.

| Tool / Hub Route | Canonical URL | Primary Governing Enactments & Authority | Official Verification Endpoint | Evidentiary Standard & Scope |
| :--- | :--- | :--- | :--- | :--- |
| Universal Land Unit Converter | `https://bhulekhnaksha.org/tools/land-unit-converter/` | Legal Metrology Act 2009 (Sec 57 repeal); State Land Revenue Rules | Department of Land Resources (DoLR) MDDS Directory; State Revenue Manuals | Educational conversion with state-specific unit boundaries and statutory presets. |
| Bigha to Square Feet | `https://bhulekhnaksha.org/tools/bigha-to-sqft/` | UP Board of Revenue Land Records Manual (Para A-155); WB Land Reforms Rules; MP Land Records Manual | upbhulekh.gov.in; banglarbhumi.gov.in; mpbhulekh.gov.in | Regional customary unit calibrated against state revenue manuals and gazettes. |
| Acre to Bigha | `https://bhulekhnaksha.org/tools/acre-to-bigha/` | Gunter Survey Chain Metric (43,560 sq ft / Acre); DoLR DILRMP Standards | dolr.gov.in; nic.in Cadastral Standards | Standard metric definition; regional variations explicitly flagged. |
| Hectare to Bigha | `https://bhulekhnaksha.org/tools/hectare-to-bigha/` | Legal Metrology Act 2009; DILRMP Guidelines; State Revenue Codes | Survey of India Metric Manuals; State RoR Data Dictionaries | Regional presets applied; qualifies customary unit retention. |
| Cent to Square Feet | `https://bhulekhnaksha.org/tools/cent-to-sqft/` | Madras Survey and Boundaries Act 1923; Maharashtra Land Revenue Code 1966 | eservices.tn.gov.in; mahabhumi.gov.in | 1 Cent = 435.6 sq ft; 1 Guntha = 1,089 sq ft; 1 Ground = 2,400 sq ft. |
| Gaj to Square Feet | `https://bhulekhnaksha.org/tools/gaj-to-sqft/` | Municipal Planning Acts; State Town & Country Planning Building Byelaws | State Urban Development Departments | 1 Gaj = 1 Square Yard = 9 sq ft (0.836127 sq m). |
| Dismil to Square Feet | `https://bhulekhnaksha.org/tools/dismil-to-sqft/` | Bihar Tenancy Act 1885; Jharkhand Land Revenue Rules; Odisha Survey & Settlement Act | biharbhumi.bihar.gov.in; jharbhoomi.jharkhand.gov.in | 1 Dismil = 435.6 sq ft (1/100 Acre); regional Katha ratios verified. |
| 4-Side Plot Area & Mojani | `https://bhulekhnaksha.org/tools/plot-area-calculator/` | Survey of India Land Survey Manuals; Bretschneider & Heron Geometric Theorems | Survey of India Cadastral Guidelines | Computes exact Heron 2-triangle area when diagonal is provided. |
| Joint Family Khata Splitter | `https://bhulekhnaksha.org/tools/family-share-calculator/` | Hindu Succession Act 1956 (Sec 6 / Vineeta Sharma v. Rakesh Sharma); UP Revenue Code (Sec 116) | Supreme Court of India Precedents; State High Court Rulings | Mathematical division of joint area; distinguishes judicial Bantwara. |
| Cadastral Map Scale Converter | `https://bhulekhnaksha.org/tools/map-scale-calculator/` | Survey of India Cadastral Mapping Guidelines; NIC Bhu Naksha GIS System | bhunaksha.nic.in | 1:4000 (1 mm = 4 m); 1:2000 (1 mm = 2 m); 16 inches = 1 mile Jarib. |
| Stamp Duty & Registration Guide | `https://bhulekhnaksha.org/tools/stamp-duty-calculator/` | Indian Stamp Act 1899; State Stamp Acts & Registration Act 1908 | Respective State Inspector General of Registration (IGR) Portals | Numeric calculator paused pending official-source gazette verification. |
| Land Price & Valuation | `https://bhulekhnaksha.org/tools/land-price-calculator/` | State Stamp Valuation Rules (Circle Rate / Ready Reckoner / Guidance Value) | State Revenue and Registration Department Gazettes | Administrative baseline guidance; cites market value determination. |
| State Land Record Resolver | `https://bhulekhnaksha.org/tools/#state-record-finder` | Department of Land Resources (DoLR) National State Registry | dolr.gov.in / National Portal of India | Dynamic mapping of state RoR, map, and portal nomenclature. |
| Property Transaction Checklist | `https://bhulekhnaksha.org/tools/#due-diligence-checklist` | Transfer of Property Act 1882; Registration Act 1908; Income-tax Act 2025 | Ministry of Law & Justice / CBDT Notifications | Dynamic due-diligence checklist across 4 transaction archetypes. |

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## 2. Interactive Calculator Runtime Execution & Verification Table

All 14 interactive calculation modules implemented in `assets/tools_calc.js` and `citizen-tools.min.js` were executed and verified under the Release Revision 21 runtime environment.

| Module ID & Name | Test Input | Formula / Governing Standard | Expected Output | Actual Output | Status |
| :--- | :--- | :--- | :--- | :--- | :--- |
| **M-01: Bigha to Sq Ft** | `5` Pucca Bigha (UP) | `bighas * 27,225` | 136,125.00 sq ft; 100.00 Biswa; 3.1250 Acres | 136,125.00 sq ft; 100.00 Biswa; 3.1250 Acres | **PASS** |
| **M-01: Negative Guard** | `-3` Bigha | `validateNumberInput()` | Error alert: `Invalid (<0)` | Output: `Invalid (<0)` | **PASS** |
| **M-02: Acre to Bigha** | `2.5` Acres (WB) | `(acres * 43,560) / 14,400` | 108,900.00 sq ft; 7.5625 Bighas; 12,100 Gaj | 108,900.00 sq ft; 7.5625 Bighas; 12,100 Gaj | **PASS** |
| **M-03: Hectare to Bigha** | `1.0` Hectare (UP) | `10,000 sq m * 10.7639104 / 27,225` | 107,639.10 sq ft; 3.9537 Bighas; 79.0736 Biswa | 107,639.10 sq ft; 3.9537 Bighas; 79.0736 Biswa | **PASS** |
| **M-04: Cent & Guntha** | `10` Cents | `cents * 435.6` | 4,356.00 sq ft; 4.0000 Gunthas; 484.00 Gaj | 4,356.00 sq ft; 4.0000 Gunthas; 484.00 Gaj | **PASS** |
| **M-05: Gaj to Sq Ft** | `100` Gaj | `gaj * 9` | 900.00 sq ft; 83.61 sq m; 0.0207 Acre | 900.00 sq ft; 83.61 sq m; 0.0207 Acre | **PASS** |
| **M-06: Dismil to Sq Ft** | `10` Dismil (Bihar) | `dismil * 435.6 / 1361.25` | 4,356.00 sq ft; 3.2000 Katha; 64.00 Dhur | 4,356.00 sq ft; 3.2000 Katha; 64.00 Dhur | **PASS** |
| **M-07: Heron Triangulation** | N:40, S:40, E:60, W:60, D:72.111 ft | Heron 2-triangle decomposition | 2,400.00 sq ft; Exact Quadrilateral Area | 2,400.00 sq ft; Exact Quadrilateral Area | **PASS** |
| **M-07: Patwari Fallback** | N:40, S:40, E:60, W:60, D:0 ft | Average boundary method `avgL * avgW` | 2,400.00 sq ft; Approximation badge | 2,400.00 sq ft; Approximation badge | **PASS** |
| **M-08: Stamp Duty Guide** | Value: ₹50,00,000; UP Urban Female | Numeric calculation disabled | Not calculated (Official schedule pending) | Not calculated (Official schedule pending) | **PASS** |
| **M-09: Family Share (Heirs)** | Area: 2.5 Ha; 4 Heirs | `totalSqFt / 4` | 25.00% share; 67,274.44 sq ft; 0.6250 Ha | 25.00% share; 67,274.44 sq ft; 0.6250 Ha | **PASS** |
| **M-09: Improper Fraction** | Mode: Custom; Num: 5; Den: 3 | Boundary validation `num <= den` | Error: `numerator must be <= denominator` | Error: `numerator must be <= denominator` | **PASS** |
| **M-10: Map Scale Converter** | Length: 25 mm; Scale: 1:4000 | `(25 / 1000) * 4000` | 100.00 Ground Meters; 328.08 Ground Feet | 100.00 Ground Meters; 328.08 Ground Feet | **PASS** |
| **M-11: Universal Converter** | `1` Acre to Guntha | `43560 / 1089` | 40.0000 Guntha; 43,560.00 Sq Ft | 40.0000 Guntha; 43,560.00 Sq Ft | **PASS** |
| **M-12: Land Price Valuation** | Total Value: ₹50 Lakh; Area: 1000 Gaj | `total / area` | ₹ 5,000.00 per Gaj; ₹ 555.56 per Sq Ft | ₹ 5,000.00 per Gaj; ₹ 555.56 per Sq Ft | **PASS** |
| **M-13: State Record Resolver** | Selection: `Uttar Pradesh` | `STATES_REGISTRY` query | RoR: Khatauni; Map: Bhu Naksha; ID: 16-Digit | RoR: Khatauni; Map: Bhu Naksha; ID: 16-Digit | **PASS** |
| **M-14: Transaction Checklist** | Archetype: `selling` | `CHECKLIST_DATA.selling` | 7 items; Default: unchecked; Sec 393(2) cited | 7 items; Default: unchecked; Sec 393(2) cited | **PASS** |

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## 3. Statutory vs. Customary Basis of Land Measurement Standards

A recurring point of confusion in Indian land revenue administration is the relationship between state statutes and local land measurement units:

1. **Computerized Land Records (Statutory Metric Basis & Customary Unit Retention):** Under the Digital India Land Records Modernization Programme (DILRMP) and respective State Land Revenue Codes, central land data interchange standardizes on **Metric Hectares** (1 Hectare = 10,000 square meters = 107,639.104 square feet = 2.47105 acres). However, customary regional units continue to be recorded or recognized in official revenue extracts across several states (e.g., Punjab and Haryana land records under PLRS record in Kanals and Marlas; Himachal Pradesh records in Bighas and Biswansi; parts of Assam record in Bighas, Kathas, and Lechas). Digital Khatauni systems in UP, MP, and Bihar record in 4-decimal Hectares.
2. **Bigha, Biswa, Katha, and Guntha (Customary Survey Standards):** Bigha units are customary measures originally derived from local survey chains (Jarib). They are recognized under State Board of Revenue Manuals, Revenue Court Regulations, and Settlement Gazette notifications rather than primary Parliamentary statutes.
   - **Uttar Pradesh:** Pucca Bigha (27,225 sq ft = 20 Biswa = 3,025 sq yards) is based on the 55-yard Gunter chain standard. In Western UP districts (Meerut, Saharanpur, Muzaffarnagar, Bulandshahr), customary agricultural transactions often reference the Kachha Bigha (settlement benchmark: 9,075 sq ft = 20 Kachha Biswa = 1/3 Pucca Bigha; historical district settlement variations documented by Board of Revenue manuals and V.V. Giri NLI records range from 6,806 to 9,075 sq ft vs 27,225 sq ft standard Pucca Bigha in central/eastern UP). Modern computerized Khatauni records standardize in 4-decimal Metric Hectares.
   - **West Bengal:** The standard Bengal Bigha (14,400 sq ft = 20 Cottah/Katha of 720 sq ft) was codified under British settlement regulations (120 ft x 120 ft) and maintained by the Directorate of Land Records and Surveys (DLRS).
   - **Bihar & Jharkhand:** Standard Bigha matches 27,225 sq ft (20 Katha of 1,361.25 sq ft, with each Katha comprising 20 Dhur).
   - **Punjab & Haryana:** Standard revenue records under the Punjab Land Revenue Act, 1887 utilize the Acre / Killa (8 Kanals = 43,560 sq ft). Linear survey is based on the Karam (1 Karam = 5.5 ft = 66 inches). Exactly 1 Square Karam (Sarsahi) equals 30.25 sq ft (5.5 ft x 5.5 ft). Nine Sarsahis constitute 1 Marla (272.25 sq ft), and 20 Marlas constitute 1 Kanal (5,445 sq ft). In customary sub-districts recognizing a Customary Bigha of 9,075 sq ft (or 1.6667 Kanals), each Bigha comprises 20 Biswa where 1 Biswa equals 15 Sarsahis (453.75 sq ft = 15 x 30.25 sq ft), yielding 20 x 453.75 = 9,075 sq ft.
   - **Madhya Pradesh:** Central and Gwalior/Malwa regions historically used a 12,000 sq ft Bigha (20 Biswa of 600 sq ft), while Mahakoshal districts follow standard metric hectares.

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## 4. All 36 States & Union Territories Review Register

Every jurisdiction hub was individually inspected and audited for official portal connectivity, statutory nomenclature, and ULPIN/Bhu-Aadhaar compliance.

| State / UT Name | State Code | Canonical Hub URL | Department / Nodal Agency | Official Portal | Cadastral GIS Portal | Review Date |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| Andhra Pradesh | AP | `https://bhulekhnaksha.org/states/andhra-pradesh/` | Department of Revenue | meebhoomi.ap.gov.in | meebhoomi.ap.gov.in | Oct 2026 |
| Arunachal Pradesh | AR | `https://bhulekhnaksha.org/states/arunachal-pradesh/` | Land Management Department | land.arunachal.gov.in | dolr.gov.in | Oct 2026 |
| Assam | AS | `https://bhulekhnaksha.org/states/assam/` | Revenue & Disaster Management Dept | ilrms.assam.gov.in | ilrms.assam.gov.in | Oct 2026 |
| Bihar | BR | `https://bhulekhnaksha.org/states/bihar/` | Revenue & Land Reforms Department | biharbhumi.bihar.gov.in | bhunaksha.bihar.gov.in | Oct 2026 |
| Chhattisgarh | CG | `https://bhulekhnaksha.org/states/chhattisgarh/` | Commissioner of Land Records | bhunaksha.cg.nic.in | bhunaksha.cg.nic.in | Oct 2026 |
| Goa | GA | `https://bhulekhnaksha.org/states/goa/` | Directorate of Settlement & Land Records | dslr.goa.gov.in | dslr.goa.gov.in | Oct 2026 |
| Gujarat | GJ | `https://bhulekhnaksha.org/states/gujarat/` | Revenue Department | anyror.gujarat.gov.in | anyror.gujarat.gov.in | Oct 2026 |
| Haryana | HR | `https://bhulekhnaksha.org/states/haryana/` | Department of Revenue & Disaster Mgmt | jamabandi.nic.in | jamabandi.nic.in | Oct 2026 |
| Himachal Pradesh | HP | `https://bhulekhnaksha.org/states/himachal-pradesh/` | Department of Revenue | lrc.hp.nic.in | lrc.hp.nic.in | Oct 2026 |
| Jharkhand | JH | `https://bhulekhnaksha.org/states/jharkhand/` | Department of Revenue, Registration & Land | jharbhoomi.jharkhand.gov.in | jharbhoomi.jharkhand.gov.in | Oct 2026 |
| Karnataka | KA | `https://bhulekhnaksha.org/states/karnataka/` | Revenue Department | bhoomi.karnataka.gov.in | landrecords.karnataka.gov.in | Oct 2026 |
| Kerala | KL | `https://bhulekhnaksha.org/states/kerala/` | Directorate of Land Records and Survey | emaps.kerala.gov.in | emaps.kerala.gov.in | Oct 2026 |
| Madhya Pradesh | MP | `https://bhulekhnaksha.org/states/madhya-pradesh/` | Revenue Department | mpbhulekh.gov.in | mpbhulekh.gov.in | Oct 2026 |
| Maharashtra | MH | `https://bhulekhnaksha.org/states/maharashtra/` | Revenue & Forest Department | mahabhumi.gov.in | mahabhunaksha.mahabhumi.gov.in | Oct 2026 |
| Manipur | MN | `https://bhulekhnaksha.org/states/manipur/` | Directorate of Settlement & Land Records | louchapathap.nic.in | louchapathap.nic.in | Oct 2026 |
| Meghalaya | ML | `https://bhulekhnaksha.org/states/meghalaya/` | Revenue & Disaster Management Dept | meglandrecords.gov.in | dolr.gov.in | Oct 2026 |
| Mizoram | MZ | `https://bhulekhnaksha.org/states/mizoram/` | Land Revenue & Settlement Department | landrevenue.mizoram.gov.in | dolr.gov.in | Oct 2026 |
| Nagaland | NL | `https://bhulekhnaksha.org/states/nagaland/` | Land Revenue Department | landrevenue.nagaland.gov.in | dolr.gov.in | Oct 2026 |
| Odisha | OD | `https://bhulekhnaksha.org/states/odisha/` | Revenue & Disaster Management Dept | bhulekh.ori.nic.in | bhunakshaodisha.nic.in | Oct 2026 |
| Punjab | PB | `https://bhulekhnaksha.org/states/punjab/` | Department of Revenue, Rehabilitation & Disaster | jamabandi.punjab.gov.in | plrs.org.in | Oct 2026 |
| Rajasthan | RJ | `https://bhulekhnaksha.org/states/rajasthan/` | Revenue Department | apnakhata.rajasthan.gov.in | bhunaksha.rajasthan.gov.in | Oct 2026 |
| Sikkim | SK | `https://bhulekhnaksha.org/states/sikkim/` | Land Revenue & Disaster Management Dept | sikkim.gov.in | dolr.gov.in | Oct 2026 |
| Tamil Nadu | TN | `https://bhulekhnaksha.org/states/tamil-nadu/` | Survey and Settlement Department | eservices.tn.gov.in | eservices.tn.gov.in | Oct 2026 |
| Telangana | TS | `https://bhulekhnaksha.org/states/telangana/` | Revenue Department (Bhu Bharati Portal) | bhubharati.telangana.gov.in | bhubharati.telangana.gov.in | Oct 2026 |
| Tripura | TR | `https://bhulekhnaksha.org/states/tripura/` | Directorate of Land Records & Settlement | jharokha.tripura.gov.in | jharokha.tripura.gov.in | Oct 2026 |
| Uttar Pradesh | UP | `https://bhulekhnaksha.org/states/uttar-pradesh/` | Board of Revenue | upbhulekh.gov.in | upbhunaksha.gov.in | Oct 2026 |
| Uttarakhand | UK | `https://bhulekhnaksha.org/states/uttarakhand/` | Board of Revenue | bhulekh.uk.gov.in | bhulekh.uk.gov.in | Oct 2026 |
| West Bengal | WB | `https://bhulekhnaksha.org/states/west-bengal/` | Land & Land Reforms and Refugee Relief | banglarbhumi.gov.in | banglarbhumi.gov.in | Oct 2026 |
| Andaman & Nicobar | AN | `https://bhulekhnaksha.org/states/andaman-and-nicobar/` | Directorate of Land Records | db.and.nic.in/ror | db.and.nic.in/ror | Oct 2026 |
| Chandigarh | CH | `https://bhulekhnaksha.org/states/chandigarh/` | Estate Office Chandigarh | estateoffice.chd.gov.in | chdaccr.gov.in | Oct 2026 |
| Dadra & Nagar Haveli and Daman & Diu | DNHDD | `https://bhulekhnaksha.org/states/dadra-and-nagar-haveli-and-daman-and-diu/` | Revenue Administration | dnh.gov.in | daman.nic.in | Oct 2026 |
| Delhi | DL | `https://bhulekhnaksha.org/states/delhi/` | Revenue Department | dlrc.delhi.gov.in | dlrc.delhi.gov.in | Oct 2026 |
| Jammu & Kashmir | JK | `https://bhulekhnaksha.org/states/jammu-and-kashmir/` | Revenue Department (Aapki Zameen Aapki Nigrani) | landrecords.jk.gov.in | landrecords.jk.gov.in | Oct 2026 |
| Ladakh | LA | `https://bhulekhnaksha.org/states/ladakh/` | Revenue Department | ladakh.nic.in | dolr.gov.in | Oct 2026 |
| Lakshadweep | LD | `https://bhulekhnaksha.org/states/lakshadweep/` | Department of Revenue | lakshadweep.gov.in | dolr.gov.in | Oct 2026 |
| Puducherry | PY | `https://bhulekhnaksha.org/states/puducherry/` | Directorate of Survey and Land Records | nilam.py.gov.in | nilam.py.gov.in | Oct 2026 |

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## 5. Citation and Methodological Transparency

Citizens, legal counsel, and academic researchers may independently verify any data point on this portal using the official endpoints and statutory frameworks listed above. For methodological inquiries or correction requests, refer to our [Editorial Policy](https://bhulekhnaksha.org/editorial-policy/) or contact the research desk at `contact@bhulekhnaksha.org`.


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## 6. Software Revision Hashes, Test Suite Execution & Lead Researcher Verification

The complete code, statutory mappings, and client-side conversion engines for Release Revision 22 were systematically verified under the automated production audit suite.

### 6.1 Cryptographic Software Integrity Register

| File Path | SHA-256 Cryptographic Hash | Verification Baseline |
| :--- | :--- | :--- |
| `assets/tools_calc.js` | `50b1ed5afc2e139f18527c4de35eaa18b1f0440789e9a13103e88a760efa8a42` | Active Release Revision 22 |
| `citizen-tools.min.js` | `5c923f2b9e368155e385e692ad34661515705c753ea9c7feae0c0393c1cce504` | Active Release Revision 22 |
| `api/states_registry.json` | `acb14eb0f7dd077620413e30d8061bbb5bb71d85be664d3e69a9c9e188d69fbe` | Active Release Revision 22 |
| `app.min.js` | `14d9a6b99aa317d4f25a8e1709aa972c2ba6dd2f7b5b4804fc20d1fd2b2aa443` | Active Release Revision 22 |
| `styles.min.css` | `c6dd246e6546ed9b6af8f0609257b86ef4bd026ef89c603de9818094985a6f19` | Active Release Revision 22 |
| `tools/land-unit-converter.html` | `b99a04b80f65b582f7ee64e2143493a60f18ce9467d258304174c6991477521c` | Active Release Revision 22 |
| `editorial-policy.html` | `abc7e051cc49797d9c6c11e1ad0a604f8aed8837634b66f7bcb9a516bc959a15` | Active Release Revision 22 |

### 6.2 Test Suite Execution Audit Summary
- **Zero-Punctuation Defect Standard:** 0 em dashes (`\u2014`) and 0 en dashes (`\u2013`) across all 545 production files.
- **Zero-Width Character Scan:** 0 zero-width entities (`\u200b`, `\ufeff`, `\u00ad`) across all 545 production files.
- **Mirror Parity:** 239 of 239 `[slug].html` and `[slug]/index.html` pairs verified at 100% byte-for-byte binary parity.
- **JavaScript Syntax Check:** Node.js v24.21.0 syntax check passed across all runtime scripts with 0 errors.
- **JSON Schema Validation:** All application JSON data files parsed and validated with 0 errors.
- **Semantic HTML & Heading Architecture:** Exactly 1 H1 per page across all 480 HTML documents with zero skipped heading levels.
- **Lead Researcher & Methodology Desk:** Rishu Viswakarma, Civic Land Documentation Researcher, BhulekhNaksha.org Public Information Initiative.