Understanding FMB Sketch Online in Tamil Nadu: A Comprehensive Guide

For property owners and buyers in Tamil Nadu, accessing an FMB sketch online can simplify due diligence. It is a digital record that includes plot measurements, survey numbers, and adjacent property details, all of which are helpful during registration. 

What is an FMB Sketch?  

An FMB (Field Measurement Book) sketch is a detailed graphical representation of land parcels, documenting precise measurements, boundaries, and other pertinent details. Maintained by the state's revenue department, these sketches are essential for surveyors, engineers, and property owners to ascertain accurate land dimensions and resolve boundary-related issues.

Features and Benefits of FMB Sketches

• Accurate Land Measurements: Provides exact dimensions and boundaries of a property, aiding in precise land assessment.​ 
• Legal Documentation: Serves as a significant document in legal matters, ensuring clarity in property disputes and ownership verification.​ 
• Ease of Access: With digital availability, property owners can conveniently access FMB sketches online, reducing the need for physical visits to government offices. ​ 

Components of an FMB Sketch  

An FMB sketch typically comprises:  

• Neighbouring Field Survey Number -Every FMB includes the numbers of nearby fields. This makes it easier to turn FMBs into D-sketches and match the survey details from the surrounding areas.  
• G-Line (Grid Line) - This line is central to the FMB sketch. It helps fix boundary lines and important points. If there’s an error in the G-line, it can affect other calculations in the sketch. 
• F-Line (Field Line) - This line marks the real outer boundary of the field. Its points are fixed based on how far they are from the G-line. It plays a major role in defining the accurate layout of the field.  
• Subdivision Lines - These lines divide a survey number into smaller parts. The extent of each section and the measurements must align, which helps keep the FMB sketch accurate.  
• Extension Lines - These lines show the exact direction in which a field connects with neighbouring fields. This makes the FMB sketch more precise.   
• Ladder: The ladder helps fix field line points by showing their distance and direction from the G-line. It tells whether the angle is on the left or right. When converted into digital data, it helps shape the sketch properly.   

FMB Sketch Types: Field Sketch Types

The FMB map includes three key types of sketches. Profile sketches represent the ground profile along a particular line. It provides valuable insight into the topography and elevation of the surveyed land. Elevation sketches focus on vertical changes in terrain along a defined path. These are especially useful in infrastructure planning, such as proposed pipeline routes. This helps in understanding ground-level variations. Plan drawings offer a detailed overhead layout of the area. They illustrate the positioning of the buildings, roads, and other features. They offer a clear view of the site’s spatial structure.  

How to Obtain an FMB Sketch in Tamil Nadu

To obtain an FMB (Field Measurement Book) sketch in Tamil Nadu, follow these steps:​ 

1. Visit the official Tamil Nadu Land Records e-Services portal.​ 

2. On the homepage, select the option labelled 'View Patta & FMB / Chitta / TSLR Extract'.​ 

3. Select your area type: 

• For rural areas:​ 
  • Choose your District 
  • Specify Taluk and Village 
  • Enter the Survey Number and Sub-Division Number 
• For urban areas:​ 
  • Choose your District 
  • Specify Town, Block, and Ward 
  • Enter the Survey Number and Sub-Division Number 

4. After entering the required details, click on the 'Submit' button. 

The system will display the FMB sketch corresponding to the provided details. You can view and download the document for your records. 

Leveraging online resources and understanding the components of FMB sketches, property owners in Tamil Nadu can ensure accurate land documentation, facilitating smoother property transactions and legal processes.​