AtlanticCity of Mobile Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS),
Office for Coastal Management (OCM)201612152014 Mobile County, AL Bare Earth DEMrasterCharleston, SCNOAA Office for Coastal Management (OCM)https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=5169https://coast.noaa.gov/htdata/raster2/elevation/Mobile_DEM_2014_5169https://coast.noaa.gov/dataviewerhttps://coast.noaa.gov
Atlantic was contracted to acquire high resolution topographic lidar (Light Detection and Ranging) data located in Mobile County, Alabama. The intent was to collect one (1) Area of Interest (AOI) that encompasses Mobile County. The total client defined AOI was 1,402 square miles or 3,361 square kilometers. Digital Elevation Models (DEMs) created from the lidar data
Mobile County, Alabama requires efficient data to effectively plan and manage county infrastructure. This dataset was developed to support Mobile County. The scope involved the acquisition of USGS Quality Level 2 LiDAR data to be processed, classified to produce a new countywide DEM and one foot elevation contours for the entire 1402 square mile Mobile County Project Area. 20141125ground conditionAs needed-88.441916 -87.91942731.20359930.194669ISO 19115 Topic CategoryelevationNoneBathymetry/TopographyMobile CountyAlabamaLidarLASDigital Elevation ModelMobileMobile County, ALNoneUsers 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be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.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. These data depict the heights at the time of the survey and are only accurate for that time.City of MobileScott Kearneymailing and physical address
205 Government St., Suite 452 S
MobileAL36602United States(251) 208-7942kearney@cityofmobile.org8:00 a.m. - 5:00 p.m.https://coast.noaa.gov/htdata/lidar1_z/geoid12b/data/4966/supplemental/al2014_mobile_county_m4966.kmzThis graphic shows the lidar coverage in Mobile County Alabama from the 2014 collection.kmzChris Cannon, Production Manager (Atlantic), James L. Taylor, Project Manager (Atlantic), Jochen A. Floesser, PMP, PG GISP- Senior Vice President (Atlantic), Brian Mayfield, CP, GISP, SP,GIS-President & Chief Operations Officer (Atlantic), Scott Kearney, GIS Manager (City of Mobile)Collection of LAS file containing high resolution elevation data attributesProjection ConsistencyArcMap 10.1 was used to validate that the correct projection information was applied to each image.Topological integrity of the data was validated using the validation tools in ESRI's ArcGIS 10.1.Mobile County, AlabamaLiDAR Horizontal Accuracy of the bare-earth data was assessed and reported in accordance with the guidelines developed by the NDEP and subsequently adopted by the ASPRS;0.09LiDAR Horizontal Accuracy of the bare-earth data was assessed and reported in accordance with the guidelines developed by the NDEP and subsequently adopted by the ASPRS;LiDAR Vertical Accuracy of the bare-earth data was assessed and reported in accordance with the guidelines developed by the NDEP and subsequently adopted by the ASPRS;
- FVA<= 0.60 ft ACCZ, 95% (030 ft RMSEZ)
- CVA<= 0.80 ft ACCZ, 95% (0.41 ft RMSEZ)
- SVA<= 0.80 ft ACCZ, 95% (0.41 ft RMSEZ)
Ninety-Five (111) surveyed points were measured for the purpose of assessing the accuracy of the Mobile County data.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Tested 0.511 US Survey Foot Fundamental Vertical Accuracy (FVA) at ninety-five percent confidence level in open terrain using RMSE(z) x 1.9600.
Tested 0.457 US Survey Foot Consolidated Vertical Accuracy (CVA) at ninety-five percent confidence level, using RMSE(z) x 1.9600.
Tested 0.372 US Survey Foot Supplemental Vertical Accuracy (SVA) at ninety-five percent confidence level, using RMSE(z) x 1.9600.0.156 Vertical_Positional_Accuracy_Explanation: 0.511 foot (0.156 meter) Vertical Accuracy (FVA): The data meets the expected vertical accuracy of 0.6ft, @ ninety-five percent confidence level, using RMSE(z) x 1.9600,. as stated in the project contract.Atlantic20141125UnknownMobile County LiDAR & Bare Earth DEMLASPortable Hard Drive20141125ground conditionMobile CountyLiDAR, DEM, ContourGround Control This Geodetic Control Survey was conducted to support Light Detection and Ranging (LiDAR) data in accordance with the National Digital Elevation Program (NDEP) and the American Society for Photogrammetry and Remote Sensing (ASPRS) guidelines. A GPS control network was performed for the purposes of establishing a three-dimensional coordinates on each of the base station locations. The control network included a combination of a National Geodetic Survey (NGS) Control Monument (MOB AP STA A1), National Geodetic Survey (NGS) CORS (AL84, AL90, AL92, ALDI, ALM) ,Mobile Control Monuments (MCC1062, MCC1067, MCC1070, MCC1072, MCC1073, MOB1000, MOB1008, MOB1009, MOB1011, MOB1023, MOB1031, MOB1034) and a capped iron found (CIPF). GPS observations at all ground control points in the network were made with Leica System 500 dual frequency GPS-receivers w/ Leica AT502 antenna and a NovAtel DL 4=L1L2 receiver w/ NovAtel NOV702 3.00 antenna between April 30, 2014 and May 2, 2014. 20140510H. Alan Kimbrough, P.L.SAtlanticSurvey Managermailing and physical address
2223 Drake Ave. SW, Suite 200
HuntsvilleAL35805United States 256.971.9991256.971.1154hakimbrough@theatlgrp.comAerial LiDAR Acquisition: Aerial data collection was acquired, in one (9) mission, using the ALS70 SN# 7123 at an altitude of 5500 ft. MSL. This was to support a 2.0 ppm^2 LiDAR point cloud. Airborne GPS and IMU data was collected during the acquisition and supported by Topcon Viper GPS base station that occupied NGS monument MOBARP. Data acquisition was collected January 12th 2014 through January 22th 2014.20140122AtlanticScott JonesMissions Operations Managermailing and physical address
2223 Drake Ave. SW, Suite 200
HuntsvilleAL35805United States256.971.9991256.971.1154srjones@theatlgrp.comLIDAR PROCESSING:
LiDAR Calibration: Initial processing of the GPS data was processed using Inertial Explorer. The solution file was generated and ALSPP software was used to generate georeferenced laser returns which were then processed in strip form allowing for the QC of the overlap between strips (lines). The data from each line were combined and automated classification routines run to determine the initial surface model. This initial surface model was then verified to the LiDAR test points.
LiDAR Classification: The calibrated LiDAR data was run through automated classification routines and then manually checked. The data was classified into the following classes: 1-unclassified, 2-ground, 3-low-points/noise, 9-water20141020AtlanticJared MartinSenior LiDAR Analystmailing and physical address
2223 Drake Ave. SW, Suite 200
HuntsvilleAL35805United States256-971-9991256-971-1154jmartin@theatlgrp.comGIS Development Products:
-Hydro-line Collection: Hydro breaklines were compiled using LiDAR Intensity data and surface model of the project area. After the completion of breaklines, they were validated and encoded into the LiDAR surface and used to hydro-enforce/flatten all significant water bodies.
-Terrain Creation: Terrain surface was created using hydro breaklines and bare ground LiDAR.
-ESRI DEM Creation: ESRI DEMs were created from the breaklines and bare-earth (ground) LiDAR data. DEM were created at 2ft resolution and tiled to client Index. Mobile county bare-earth DEM dataset produced from algorithmically thinned bare-earth ground classified lidar point cloud.20141125AtlanticRobert Yao-Kumah, GISPSenior Geospatial Analystmailing and physical address
2223 Drake Ave. SW, Suite 200
HuntsvilleAL35805United States256-971-9991256-971-1154ryaokumah@theatlgrp.comThe NOAA Office for Coastal Management (OCM) received the files from the City of Mobile GIS office. The files were ingested into the Digital Coast Data Access Viewer (DAV) system and this metadata record was modified to correct errors and reflect distribution through the DAV system.20161214NOAA Office for Coastal Management (OCM)mailing and physical
2234 South Hobson Ave.
CharlestonSC29405-2413US843-740-1202coastal.info@noaa.gov0RasterPixel300030001State Plane Coordinate System 198301020.99996-87.530.01968500.00.0coordinate pair22Survey FeetNorth American Datum of 1983Geodetic Reference System 806378137.0298.257222101North American Vertical Datum of 1988 (Geoid12A)800feetExplicit elevation coordinate included with horizontal coordinatesNOAA Office for Coastal Management (OCM)mailing and physical
2234 South Hobson Ave.
CharlestonSC29405-2413US843-740-1202coastal.info@noaa.govDownloadable DataAny conclusions drawn from the analysis of this information are not the responsibility of Atlantic, City and County of Mobile, NOAA, the Office for Coastal Management or its partners.This data can be obtained on-line at the following URL:
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=4966
The data set is dynamically generated based on user-specified parameters.20161214NOAA Office for Coastal Managementmailing and physical
2234 South Hobson Ave.
CharlestonSC29405-2413843-740-1202ocm.info@noaa.govFGDC Content Standard for Digital Geospatial MetadataFGDC-STD-001-1998