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Letters of Map Change: How to Update Flood Maps

Letters of Map Change: How to Update Flood Maps

Letters of Map Change: How to Update Flood Maps

Wendy Lathrop PLS, CFM
Wendy Lathrop PLS, CFM
on behalf of GeoLearn LLC

$49.00 $ 49.00 $ 49.00

$ 49.00 49.00 49.00
49.00 $ 49.00 49.00 49.00
Normal Price: $49.00 $49.00


Launch date: 02 Jan 2014
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Last updated: 23 Dec 2020

Reference: 78099

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A Flood Insurance Rate Map (FIRM) represents a snapshot in time of watershed conditions, as well as a generalization of the topography. There are multiple ways to update a FIRM, and this session addresses those processes as well as the regulatory and technical background behind them. This session focuses on Letters of Map Amendment and Letters of Map Revision, the distinctions between them, the application processes to secure approval, and when they cease to be officially controlling documents.

Letters of Map Change officially supplement the currently effective FIRM, and serve to waive federal mandates for flood insurance coverage as well as federal mandates for land use regulation. An understanding of “why” must accompany the “how to do it” aspects in order to perform professionally and ethically in securing successful Letters of Map Change from FEMA.


Upon completion of this course, the participant should expect to be able to:
• Recognize the importance of keeping floodplain mapping current and accurate
• Distinguish between the various types of Letters of Map Change to know when each is appropriate
• Understand the regulatory basis for successful LOMC applications
Wendy Lathrop PLS, CFM

Author Information Play Video Bio

Wendy Lathrop PLS, CFM
on behalf of GeoLearn LLC

Wendy Lathrop, president and owner of Cadastral Consulting, is licensed as a Professional Land Surveyor in several states and as a Professional Planner in New Jersey. She holds a Master's degree in Environmental Policy, and has been involved in surveying since 1974 in projects ranging from construction to boundary to environmental land use disputes. Wendy is also a Certified Floodplain Manager through the Association of State Flood Plain Managers (ASFPM). A former adjunct instructor at Mercer County College in New Jersey, Wendy has also taught as part of the team for the licensing exam review course at Drexel University in Pennsylvania. She has been teaching seminars for surveyors since 1986 and has been writing articles for surveyors since 1983. Wendy is a contributing editor for a number of professional publications.

Current Accreditations

This course has been certified by or provided by the following Certified Organization/s:

  • Texas A&M University Corpus Christi
  • 1.00 Hours

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