![]() ![]() In an evaluation of the study area, CDM determined that the root-mean square average difference in elevation for 48 surveyed points as compared to the LIDAR TIN data was 0.52 feet, and this met the FEMA minimum accuracy requirement of 1.2 feet. CDM developed a bare earth TIN Digital Elevation Model based on this data, which was used as the basis for this coverage. Prepared for: FEMA Region I, February 2008. Task Order 18 Activity 1–Topographic Data Development / Acquisition Summary Report. Based on LIDAR data, in 2009 Camp Dresser and McKee developed GIS Triangulated irregular network (TIN) digital elevation models for FEMA, as described in the report, Flood Mapping Activities for Plymouth and Bristol Counties, Massachusetts (29 MB pdf). This elevation coincides largely with the FEMA FIRM flood elevation for the town (a small area of the town has a 14-foot elevation flood zone). The Buzzards Bay NEP obtained this data to prepare a Google Earth-readable kmz file that shows portions of Marion that are equal to or below a 15-foot elevation. Explanation of Marion 15 foot Elevation MapĪ LIDAR aerial mapping flight(Light Detection and Ranging) was conducted in November and December of 2007 by Sanborn Mapping Company under a contract with the firm Camp Dresser and McKee for FEMA to help evaluate the new FIRMs. To download maps or digital GIS data, visit the FEMA Map Service Center (choose “flood maps” for pdf maps or “DFIRM databases” for GIS files). To check the status of this effort, go to this FEMA Multi-Year Flood Hazard Identification Plan (MHIP) site and this Flood Mapping Information page. In 2010, Plymouth and Barnstable County final maps and digital shapefiles should become available. Draft hard copy maps for Barnstable and Plymouth County have been released to municipalities, but have not been finalized, so digital copies are not yet available. In 2009, FEMA updated its FIRM maps for Bristol County. (a 260 kb kmz file, requires Google Earth). For insurance determinations, consult only with original fema documents.ĭo you have Google Earth installed on your computer (a free program)? If not go to the Google Earth website to download it. 195 (it appears as a a portion of square block missing from the coverage). This interactive Google Earth map has data for all areas of Marion, except a tile in the northwest portion of the town just north of Rt. Fema also offers this online mapping information platform. At this page you can print a personalized “FIRMETTE” map for your home. Updated FEMA FIRM maps for Buzzards Bay CommunitiesįEMA has provided a FIRM MAP display page. In the sections below, we provide some useful tools to help interested parties identify flood plains, including the most recent updated information for Bristol County. (Visit FEMA page: How To Request a Flood Hazard Determination Review from FEMA). Read this FEMA letter to the Town of Marion for more information.īecause of the approximate nature of even the original FIRMs, property owners sometimes conduct their own studies to identify flood plain elevations. Draft FIRMS in paper form were prepared for Plymouth County, including the Town of Marion, and these were expected to be finalized in 2010, but because of problems in the draft maps, the release of updated draft maps was delayed until late in 2011. ![]() More information about the FIRMs can be found on the FEMA fact sheets page for the program. The maps and links below provide good estimates of those boundaries. This page provides maps and key links to this information for the Town of Marion, including maps prepared by the Buzzards Bay NEP.Ī property owner’s primary source of flood plain information is the FEMA National Flood Insurance Rate Maps (FIRM) to definitively identify flood plain boundaries for insurance purposes (unless parcel specific data is available). To implement a number of recommendations in the Buzzards Bay CCMP requires a good understanding of the location of the 100-year floodplain (Federal Emergency Management Agency, or FEMA FIRM maps), barrier beaches, and areas of high erosion. ![]()
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