Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
Digital orthographic imagery datasets contain georeferenced images of the Earth's surface, collected by a sensor in which object displacement has been removed for sensor distortions and orientation, and terrain relief. Digital orthoimages have the geometric characteristics of a map, and image qualities of a photograph. (Source: Circular A-16, p. 16)
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
Terrain data, as defined in FEMA Guidelines and Specifications, Appendix N: Data Capture Standards, describes the digital topographic data that was used to create the elevation data representing the terrain environment of a watershed and/or floodplain. Terrain data requirements allow for flexibility in the types of information provided as sources used to produce final terrain deliverables. Once this type of data is provided, FEMA will be able to account for the origins of the flood study elevation data. (Source: FEMA Guidelines and Specifications, Appendix N, Section N.1.2).
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the State Plane projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12000.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the State Plane projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12000.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk Information And supporting data used to develop the risk data. The primary risk; classificatons used are the 1-percent-annual-chance flood event, the 0.2-percent- annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA).
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
Digital orthographic imagery datasets contain georeferenced images of the Earth's surface, collected by a sensor in which object displacement has been removed for sensor distortions and orientation, and terrain relief. Digital orthoimages have the geometric characteristics of a map, and image qualities of a photograph. (Source: Circular A-16, p. 16)
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
Hydrology data include spatial datasets and data tables necessary for documenting the hydrologic procedures for estimating flood discharges for a flood insurance study, which includes the hydrologic data expected by FEMA for new riverine studies. (Source: FEMA Guidelines and Specifications, Appendix N)
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Floodplain Mapping study deliverables depict and quantify the flood risks for the study area. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The Redelineation flood risk boundaries are derived from the engineering information Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA).
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Floodplain Mapping/Redelineation study deliverables depict and quantify the flood risks for the study area. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual- chance flood event, and areas of minimal flood risk. The Floodplain Mapping/Redelineation flood risk boundaries are derived from the engineering information Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA).
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The 2006 OSIP digital orthophotography was collected during the months of March and April (leaf-off conditions). The MrSID Images covering each county at 1-foot pixel resolution will be created at a 30:1 compression ratio. At a 30:1 compression ratio, the resulting MrSID file size will average around 2GBs in size (dependent upon county size). MrSID Images will also be created for each buy-up county. These MrSIDs, will be compressed at a 20:1 ratio. In some cases, buy-up counties have requested a higher compression ratio. Hancock and Fairfield Counties have requested countywide ECW image files.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
Survey data includes spatial datasets and data tables necessary to digitally represent data collected in the survey phase of the study. (Source: FEMA Guidelines and Specs, Appendix N)
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system.The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Floodplain Mapping/Redelineation study deliverables depict and quantify the flood risks for the study area. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual- chance flood event, and areas of minimal flood risk. The Floodplain Mapping/Redelineation flood risk boundaries are derived from the engineering information Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA).
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk; classificatons used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
Digital orthographic imagery datasets contain georeferenced images of the Earth's surface, collected by a sensor in which object displacement has been removed for sensor distortions and orientation, and terrain relief. Digital orthoimages have the geometric characteristics of a map and image qualities of a photograph. (Source: Circular A-16, p.16)
Published By US Fish and Wildlife Service, Department of the Interior
Issued over 9 years ago
Summary
Description
Shortterm, static exposure toxicity tests were conducted in the New Jersey Field Office laboratory to evaluate the potential for the water accommodated fractions of Arab light crude oil which is transported in large quantities through Delaware Bay and Corexit.9527 the most commonly used dispersant in the United States to adversely affect gametes, fertilization and early postfertilization development of the horseshoe crab Limulus polyphemus. Gametes were obtained from adult horseshoe crabs using a modified Arbacia stimulator. This method yielded sufficient viable gametes for toxicity tests without harming the adults. Eggs and sperm were exposed to seawater or one of five concentrations four replicates concentration of oil, 1:10 dispersant:oil mix, or dispersant only. Toxicant solutions were prepared using methods described in the National Oil Spill Contingency Plan 40 CFR Parts 9 and 300. Measured concentrations of total petroleum hydrocarbons TPH in exposure water prepared with oil only ranged from 1.0 ppm to 4.8 ppm. In addition, concentrations of total polynuclear aromatic hydrocarbons PAHs ranged from 0.0002 to 0.045 ppm and the summed concentrations of the volatile monoaromatic hydrocarbons BTEX ranged from 0.01 to 0.18 ppm. In exposure water prepared with oil and dispersant, TPH concentrations ranged from 1.0 to 88 ppm, concentrations of total PAHs ranged from 0.0002 to 0.600 and summed concentrations of volatile compounds ranged from 0.01 to 0.74 ppm. Dispersant concentrations were not measured. Nominal dispersant concentrations ranged from 1.0 to 100 ppm. Maximum total PAH concentrations and all the nominal dispersant concentrations used in this study exceeded adverse effect levels reported for sensitive marine species. Toxicant exposure lasted 24 hours after which embryos were maintained in clean water. Chambers were checked at the beginning of exposure for evidence of sperm viability activation upon introduction to eggs and fertilization success granulation and percent viable embryos after 48 hours. After transfer to clean water, chambers were monitored for evidence of successful development to the blastula stage. At 25C, development proceeded to early stages of germ disc formation before observations were terminated. Exposure to dispersant resulted in activation of sperm even when eggs were not present. The threshold concentration of Corexit 9527 for this effect was between 10 and 50 ppm. In the field, the timing of egg and sperm release is such that activation stimulated by dispersant is not considered to be an adverse effect. Sperm were activated by the presence of eggs even during exposure to the most concentrated oil, dispersant and oil, or dispersant test solutions used. The fraction of eggs that was successfully fertilized during exposure to toxicant mixtures approximately 80 was not different from that observed in controls. The percentages of viable embryos observed after 48 hours were the same as percentages that reached the blastula stage of development approximately 96 hours, suggesting that 1 development to the blastula stage was not affected by initial exposure to toxicant mixtures, and 2 viability at 48 hours may be a reasonable index of the potential for successful development to later stages. It is concluded that gametes, fertilization and early embryonic development of the horseshoe crab were not adversely affected by exposure to water mixed with arab light crude oil, Arab light crude oil and Corexit 9527, or Corexit 9527 alone, even when total PAH and dispersant concentrations in some test mixtures exceeded levels that are toxic to sensitive marine species.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
FEMA Framework Basemap datasets comprise six of the seven FGDC themes of geospatial data that are used by most GIS applications (Note: the seventh framework theme, orthographic imagery, is packaged in a separate NFIP Metadata Profile): cadastral, geodetic control, governmental unit, transportation, general structures, hydrography (water areas & lines. These data include an encoding of the geographic extent of the features and a minimal number of attributes needed to identify and describe the features. (Source: Circular A16, p. 13)
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Floodplain Mapping/Redelineation study deliverables depict and quantify the flood risks for the study area. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual- chance flood event, and areas of minimal flood risk. The Floodplain Mapping/Redelineation flood risk boundaries are derived from the engineering information Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA).
Published By U.S. Geological Survey, Department of the Interior
Issued over 9 years ago
Summary
Description
There are critical needs for a nationwide compilation of reliable shoreline data. To meet these needs, the USGS has produced a comprehensive database of digital vector shorelines by compiling shoreline positions from pre-existing historical shoreline databases and by generating historical and modern shoreline data. Shorelines are compiled by state and generally correspond to one of four time periods: 1800s, 1920s-1930s, 1970s, and 1998-2002. Each shoreline may represent a compilation of data from one or more sources for one or more dates provided by one or more agencies. Details regarding source are provided in the 'Data Quality Information' section of this metadata report. Shoreline vectors derived from historic sources (first three time periods) represent the high water line at the time of the survey, whereas modern shorelines (final time period) represent the mean high water line.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
Hydrology data include spatial datasets and data tables necessary for documenting the hydrologic procedures for estimating flood discharges for a flood insurance study which includes the hydrologic data expected by FEMA for existing riverline studies. (Source: FEMA Guidelines and Specifications, Appendix N)
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the State Plane projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12000.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual- chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). In addition to the preceding, required text, the Abstract should also describe the projection and coordinate system as well as a general statement about horizontal accuracy.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued over 9 years ago
Summary
Description
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.