61272 Data Set Published / External 49404 DEMs - partner (no harvest) Project Completed 2012-02-10 Digital Mapping Inc. collected lidar data for the Federal Emergency Management Agency (FEMA) in Region 9, Modoc, CA. This bare earth digital elevation model (DEM) dataset encompasses 21 square miles, while the lidar point cloud from which this DEM was derived covers a total of 43 square miles (linked to in the Related Items section, below). Nominal pulse spacing of collection was <1 m. Terrain data is used to represent the topography of a watershed and/or floodplain environment and to extract useful information for hydraulic and hydrologic models. (Source: FEMA Guidelines and Specifications, Appendix N) Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY > COASTAL BATHYMETRY Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION Theme ISO 19115 Topic Category elevation Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA Spatial Global Change Master Directory (GCMD) Location Keywords VERTICAL LOCATION > LAND SURFACE Spatial Global Change Master Directory (GCMD) Location Keywords VERTICAL LOCATION > SEA FLOOR Instrument Global Change Master Directory (GCMD) Instrument Keywords LIDAR > Light Detection and Ranging Platform Global Change Master Directory (GCMD) Platform Keywords Airplane > Airplane Theme FEMA NFIP Topic Category Breaklines Theme FEMA NFIP Topic Category Digital Terrain Model Theme FEMA NFIP Topic Category Elevation Data Theme FEMA NFIP Topic Category LIDAR Theme FEMA NFIP Topic Category Land Surface Theme FEMA NFIP Topic Category Topography Spatial Geographic Names Information System COMMUNITY Modoc County Spatial Geographic Names Information System COUNT-FIPS 049 Spatial Geographic Names Information System COUNTY Modoc Spatial Geographic Names Information System FEMA-CID 060192 Spatial Geographic Names Information System Region 09 Spatial Geographic Names Information System STATE CA Office for Coastal Management Charleston SC Data Set Elevation None Planned Model (digital) Appendix N of FEMA Guidelines and Specifications for FEMA Flood Hazard Mapping Partners contains a detailed description of the data themes and references to other relevant information. No warranty expressed or implied is made by FEMA regarding the utility of the data on any other system nor shall the act of distribution constitute any such warranty. Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners FEMA, Digital Mapping Inc. for the BakerAECOM, LLC Data Steward 2020 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2020 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Metadata Contact 2020 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Point of Contact 2020 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Ground Condition -120.58570417 -120.44318533 41.51813209 41.3914362 Discrete 2011-05-04 10 Meter No No No No No Unclassified Data is available online for bulk or custom downloads None Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9163 2020 Organization NOAA Office for Coastal Management Customized Download Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base. Zip Zip https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/FEMA_modoc_CA_DEM_2011_9163/ 2020 Organization NOAA Office for Coastal Management Bulk Download Bulk download of data files in original coordinates and datums. GeoTIFF GeoTIFF https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9162/supplemental/extent_Modoc_CA_m9162.kmz Browse graphic Browse Graphic KML This graphic displays the footprint for this lidar data set. https://coast.noaa.gov/dataviewer/ NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) Online Resource HTML The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer. https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9162/supplemental/BakerAECOM_LiDAR_Modoc_Final_QAQC_Report.pdf Dataset report Online Resource PDF Link to data set report. https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9162/supplemental/Modoc_Final_Report.pdf Dataset report Online Resource PDF Link to data set report. GeoCue, TerraScan, TerraMatch, MicroStation, DashMap, Windows XP Quantitative value: , Test that produced the valued: Modoc tested 0.449 ft (13.69 centimeters) Fundamental Vertical Accuracy at 95% confidence level in open terrain using RMSEz x 1.9600. The Modoc FVA value passes the minimum requirement of 24.5 centimeters. Fundamental Vertical Accuracy (FVA) is defined as “The value by which vertical accuracy can be equitably assessed and compared among datasets. The FVA is determined with vertical checkpoints located only in open terrain, where there is a very high probability that the sensor will have detected the ground surface.” (FEMA Procedure Memorandum No. 61‐ Standards for LiDAR and Other High Quality Digital topography, September, 27, 2010, Page 6) The twenty‐five (25) points are to be evenly distributed throughout the project area. See QA/QC Report for more details. The Terrain data are consistent with the Elevation dataset. A comparison of profile plots with the flow vector data confirms that flow vectors are correctly drawn. Flood hazard boundaries do not extend beyond the ExternalBoundary, if exists. Yes Unknown Yes NCEI-CO Data is backed up to tape and to cloud storage. LIDAR Data Organization Digital Mapping Inc Originator 2012-02-10 Discrete 2011-05-04 Digital Mapping Inc. 1 1-Acqusition: Modoc LIDAR acquisition consisted of 26 flight lines with 2 cross flights. Alturas Airport was flown for the airport calibration. Two base stations were used for the project. The LIDAR misson was flown in 05/04/2011. ALTM Gemini was used as the LIDAR scanner. LIDAR flight settings were: Altitude (m): 1200 System PRF (kHz): 70 Scan Freq (Hz): 39 Scan Angle +/-: 17 Desired Res (m): 0.804 PPM^2: 1.55 2-Processing: LIDAR data were processed and fit to the ground using DASHMap, GeoCue, TerraScan and TerraMatch softwares. All the data were calibrated to determine and eliminate systematic biases that might occur within the hardware of the ALTM Gemini system. A total of 11 aerial targets were surveyed and used to fit the LIDAR data to the ground. Ground point were removed from the top of bridges. LAS tiles that touch processing limit are classified however QA\QC of the ground points were done to the data which were within processing limit. LAS tiles are classified into 6 classes: 1 processed, but unclassified 2 bare-earth ground 7 noise 9 water 10 ignored 11 withheld 3-Breaklines: Breaklines were compiled for streams, lakes, ponds and man-made features -bridges, culverts- that constrict or control the flow of water in 3D data collection mode from LIDAR data. Breaklines were not collected for the areas outside the processing limit. Ponds and lakes are collected as polygons. They have constant elevation and they have elevation values less than the surrounding ground points. For dry streams and streams narrower than 50 feet single stream breaklines were collected. For streams wider than 50 feet edges of the streams were collected along with stream centerline. The project area was relatively flat which made it some of the streams having single elevation across. Stream breaklines were broken at culverts and not broken at bridges. Culvert breaklines snap to stream endpoints on both sides and have the same elevation as the stream breakline at the snapping location. Top and bottom of the bridge breaklines were collected. Breaklines are delivered as ESRI geodatabase file format. Topology rules were applied to the breaklines. Breaklines snap to each other, split at intersections, not self-intersect or overlap each other. 4-Low Confidence Areas: Areas that may not meet the data accuracy requirements due to heavy vegetation were compiled as 2D polygon. Special effort was given to minimize these areas. Ground points were tried to be classified from dense vegetation areas where possible using manual techniques. 2 NOAA Office for Coastal Management (OCM) received 1 bare earth raster DEM file in geotiff format. The data were in California State Plane Zone 1 (NAD83), international feet coordinates and NAVD88 (Geoid03) elevations in international feet, at 10 ft spacing. OCM copied the raster files to https for Digital Coast storage and provisioning purposes. Organization Office for Coastal Management OCM https://ror.org/05v14bq57 2234 South Hobson Avenue Charleston SC 29405-2413 https://www.coast.noaa.gov/ gov.noaa.nmfs.inport:61272 Blake Waring 2020-07-27T14:18:46 SysAdmin InPortAdmin 2026-03-04T19:17:17 2024-01-10 OCM Partners OCMP 1002 Public No No 2022-03-16 1 Year 2023-03-16