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Engineers, Surveyors & Architects

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Engineers, surveyors and architects (those employed by private firms and those employed by federal, state and local agencies) are actively involved in the development of the new and updated flood hazard information presented on National Flood Insurance Program (NFIP) flood hazard maps and related products. This page outlines products, services and publications available to engineers, surveyors and architects.

Online Letter of Map Change (LOMC)

Online Letters of Map Change (LOMC) is an internet-based tool that allows applicants to easily request any type of LOMC. It is a convenient way for applicants to upload all information and supporting documentation and check the status of their application online. Users can submit flood map Amendment or Revision requests and pay any associated fees through this tool instead of filing the MT-EZ, MT-1 or MT-2 paper forms submitted through the mail. 

Community Preliminary Flood Hazard Data

FEMA has launched a new way to view your community’s preliminary flood hazard data: over the web and in one convenient location! Preliminary flood hazard data provide an early look at your home or community’s risk to flood hazards. There are many benefits to viewing your community’s data before it becomes effective. For more information, visit the Preliminary Flood Hazard Data webpage.

FEMA Engineering Library

To obtain archival, technical and administrative support data, please visit the Engineering Library.

LOMC Clearinghouse

FEMA’s LOMC Clearinghouse  centralizes the administrative functions associated with processing MT-EZ, MT-1 and MT-2 requests. Specific activities include creation of LOMC case files, upload and scanning of data, processing of associated fees and distribution to the appropriate location for processing.

When submitting paper applications, requestors should mail their applications and supporting data to:

LOMC Clearinghouse847 South Pickett Street,Alexandria, VA 22304-4605Attn: LOMC Manager

For more information about the LOMC Clearinghouse, please contact the FEMA Map Information eXchange.

How to View and Obtain Flood Maps

You may view and download the effective maps and other NFIP products through the FEMA Flood Map Service Center. Your local Community Map Repository, usually located in the planning and zoning office, also has copies of flood maps. Please contact the FEMA Map Information eXchange, toll free at 1-877-FEMA MAP (1-877-336-2627) or email a Map Specialist at to determine the location of your Community Map Repository.

Products, Services and Publications

Need to Produce a New Map?

  • A suite of engineering and mapping tools including forms for producing flood maps is available when you register to use the FEMA Mapping Information Platform under the Tools & Links page. These tools will assist in meeting the current FEMA guidelines and specifications for flood maps.

Changing a Map?

  • Submit a request through Online LOMC or the eLOMA tool. The eLOMA tool is available for licensed surveyors and engineers to submit LOMA requests that are not considered to be within a coastal zone, alluvial fan, or modified by fill to raise the elevation of the structure.  View and download the required FEMA Flood Mapping Related Forms including application form packages for conditional and final Letters of Map Amendment, Letters of Map Revision Based on Fill and Letters of Map Revision.

Checking Status?

  • If you  submitted a request through either the Online LOMC or eLOMA tool, you may check the status  of your application at any time by logging into your account. You may also view recent priority map changes on the  Status of Map Change Requests page.

Looking for a Letter of Map Amendment (eLOMA)?

Elevation Certificate Questions?

Ordering Technical and Administrative Support Data?

Need Software?

  • Locate and download software approved for use by FEMA to support the NFIP, including associated documentation and guidance.

What's New in Flood Hazard Mapping?

Frequently Asked Questions

Go to Frequently Asked Questions for Engineers, Surveyors and Architects.

For More Information

For flood insurance related questions, contact FloodSmart at 1-888-379-9531. For flood mapping-related questions, please contact a Map Specialist at the FEMA Map Information eXchange through the following methods:

  • Call (1-877) FEMA MAP (1-877-336-2627) Monday through Friday, 8:00 am through 6:30 pm (EST)
  • Email
  • Chat with a Map Specialist Monday through Friday, 9:00 am to 5:00 pm (EST)

Engineers, surveyors, and architects may also subscribe to receive updates on FEMA Flood Hazard Mapping activities via e-mail.

Last Updated: 
03/26/2015 - 09:20
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