US Army Corps of Engineers
New Orleans District

EM Codes

Alignment/Baseline Records

#B01 - Coordinates and station of baseline PI
#B00 - Name of datafile containing the reference alignment/baseline
#BC1 - Coordinates and station of point of curve
#BI1 - Coordinates and station of point of intersection
#BT1 - Coordinates and station of point of tangent

Survey Crew Members

#C01 - Party Chief
#C02 - Instrument Man
#C03 - Rodman

Gage Metadata

#G01 - Staff gage code number
#G02 - Name of gage
#G03 - Water surface elevation as read on gage
#G04 - Time of gage reading based on 24 hr clock
#G05 - LMSL Reference
#G06 - LMMW Reference
#G07 - Horizontal position of the gage
#G10-#G99 - Descriptions and or comments

Survey Job General Parameters

#H01 - Standard DOS file name of ASCII file
#H02 - Date (MM/DD/YYYY)
#H03 - Order (accuracy) of survey (1,2,3..AA)
#H04 - Horizontal datum
#H05 - Job number of survey (YY-JJJ)
#H06 - Unit of linear measure (FT, MT, MI, ...)
#H07 - Map projection
#H08 - Location of survey
#H09 - Survey firm or organization
#H10 - Index number of survey field book
#H11 - Page number of field book
#H12 - Combined scale factor
#H13 - County Name
#H14 - Quad Name
#H15 - Contract number
#H20 - Title of survey job
#H21-#H29 - Continuation of survey job title
#H30 - Comments about the survey job
#H31-H99 - Continuation of comments

Equipment/Instrument Metadata Records

#E01 - Instrument
#E02 - Serial number

Miscellaneous Dataset

#M01-#M99 - Description of miscellaneous survey points that follow

Profile Dataset

#P01 - The profile segment's beginning x-y coordinates and stationing
#P03 - Time of profile. Only needed if elevations of points are relative to prorated water surface
#P04 - Prorated water surface elevation used for elevation of points in profile

Cross-Section Dataset

#X01 - The range line definition which contains the end point coordinates, station, and name of the range
#X02 - Range code or index number
#X03 - Time of cross-section. Only needed if elevations of points are relative to prorated water surface
#X04 - Prorated water surface elevation used for elevation of points in cross-section

Vertical Control -Temporary Benchmark Metadata

#T01 - Name of temporary benchmark (TBM)
#T02 - Given elevation of TBM
#T05 - Condition of TBM
#T06 - Found elevation of TBM
#T10-#T99 - Description of TBM

Vertical Control - Permanent Benchmark Metadata

#V01 - Name of permanent benchmark
#V02 - Given elevation of PBM
#V03 - Epoch (date of adjustment)
#V04 - Vertical Datum (NAVD88, MLLW, Etc)
#V05 - Condition of PBM
#V06 - Found elevation of PBM
#V07 - Horizontal Position of PBM
#V08 - NGS PID Designation
#V09 - Vertical adjustment
#V10 - LMSL Relationship
#V11 - MLLW Relationship
#V12 - NTDE Period
#V20-#V99 - Description of PBM

Weather Metadata Records

#W01 - Temperature
#W02 - Pressure
#W03 - Humidity
#W04 - Cloud conditions (0-10% clear; 10-50% scattered; 50-90% broken; 90-100% obscured)
#W05 - Wind speed
#W06 - Wind direction (N,S,E,W,NE,NW,SE,SW)