Hazards Data Distribution System (HDDS) Data Dictionary

 

Acquisition Date

• Field Definition:  The acquisition date refers to the date the image was captured.

               Format:

                  YYYY/MM/DD

               Values:

                  YYYY = Year MM=Month DD=Day

 

Acquisition Time

• Field Definition:  Time of image acquisition

                Format:

                          i.e.: 17:14:55

                 Values:

                           Military time - Hours, Minutes, Seconds/Blank or zero-filled if unknown

 

Agency

• Field Definition:  The organization affiliated with the data provision. This could be city, county, state, federal or a private corporation; i.e.: DOD, FEMA, NOAA, NGA, USGS, NASA, Jackson County, MS ... etc.

 

Batch

• Field Definition:  This refers to the name assigned to a particular batch of imagery; i.e.: /Block4_NewOrleans, etc.

 

Bits Per Pixel

• Field Definition:  Bit content of each pixel within browse image

 

Browse Bands

• Field Definition:  Combination of color spectrum bands; i.e. Red, Green, Blue (RGB) comprised in the image. i.e.: 001002003

 

Catalog ID

• Field Definition:  The scene ID that correlates with the scene ID in the Vendor's catalog.

              Example:

                  Example of QUICKBIRD-2 Entity ID: 101001000EA79200

                  Example of WORLDVIEW-1 Entity ID: 102001002F5D4C00

                  Example of WORLDVIEW-2 Entity ID: 10300100092D3A00

                  Example of GeoEye-1 Entity ID: 1050410001B95C00

                  Example of IKONOS-2 Entity ID: 1060010006430700

 

Cloud Cover

• Field Definition:  Cloud cover is the percentage of clouds found in the image. The percentage is displayed as either Null or the cloud percentage measured from 0 to 100.

 

Coordinates Decimal Degrees

• Field Definition:  The coordinates of the scene Center, NE Corner, NW Corner, SE Corner, SW Corner in decimal degrees

                 Format:

                     Latitude Format Decimal Degrees: -90 - 90

                     Longitude Format Decimal Degrees: -180 - 180

                Values:

                     Coordinates in decimal degrees for the following fields:

 

                     Scene Center Latitude and Longitude

                     NE Corner Latitude and Longitude

                     NW Corner Latitude and Longitude

                     SE Corner Latitude and Longitude

                     SW Corner Latitude and Longitude

 

Coordinates Degrees, Minutes, Seconds

• Field Definition:  The coordinates of the scene Center, NE Corner, NW Corner, SE Corner, SW Corner points in degrees, minutes, seconds. Degrees, Minutes, Seconds

                Format:

                    Latitude Format:

                    DDDMMSS.SS

                    DDD = Degree(s) with a range of 0 - 180

                    MM = Minute(s) with a range of 0 - 59

                    SS.SS = Second(s) with a range of 0 - 59.99

             Values:

                 Coordinates in degrees, minutes, seconds for the following fields:

                 Scene Center Latitude and Longitude

                 NE Corner Latitude and Longitude

                 NW Corner Latitude and Longitude

                 SE Corner Latitude and Longitude

                 SW Corner Latitude and Longitude

 

Datum

• Field Definition:  The fixed reference point used

 

Emergency Operations (EO) Scene ID

• Field Definition:  This field is used to identify the Emergency Operations image by assigning a unique series of letters and numbers.

                Format:

                    SSNNCCCCCCCCCCCCCCCCCCCCCYYYYMMDDyyyymmddTTVV

                Values:

                    SS = Source where:

                    QB = QuickBird

                    IK = IKONOS

                    AE = Aerial

                    OR = OrbView

                    HY = Hyperion

                    AL = Advanced Land Imager

                    RA = Radarsat

                    EN = Envisat

                    AS = Aster

                    LI = LISS

                    LD = LIDAR

                    CB = CBERS

                    SA = SACC

                    AW = AWIFS

                    ER = ERS

                    FO = Formosat

                    PR = Prism

                    AN = AVNIR

                    PA = PALSAR

                    AH = AVHRR

                    MO = MODIS

                    PM = AQUA

                    LS = Landsat

                    GP = GeoPDF

                    SP = SPOT

                    CS = Cosmo

                    DE = DEM

                    AM = Terra

                    RE = RapidEye

                    GE = GeoEye

                    IS = ISS

                   EO = EO

                   WV = WorldView

                   DM = UKDMC

                   MR = Map Product

                   MP = Forest Service Map

                   NN = Platform

                   CC … CC = Scene center point in decimal degrees

                   YYYYMMDD = Acquisition date (or mosaic start date)

                   yyyymmdd = Mosaic end date (00000000 if not relevant)

 

                    TT = type indicator with possible values of: MS: multispectral, PN: Pan, HP: hyperspectral, RD: radar, IR: CIR, OL: color, IM: DIR panchromatic merge, OM: COL panchromatic merge

                    VV = version number: 01, 02, etc.

 

Entity ID

• Field Definition:  Emergency Operations identifier

 

Event

• Field Definition:  Unique name used to identify the Emergency Response Event; i.e.: 200508_Hurricane_Katrina, etc.

 

Event Type

• Field Definition:  The Event Type is a specific category assigned to this event.

 

File Format

• Field Definition:  Format of the data: i.e. GeoTIFF, FastFormat, Mr. Sid, JPEG, etc.

 

Incidence Angle

• Field Definition:  The angle of incidence can be defined as the angle with which a light ray strikes a reflecting surface. Normal incidence is the case in which the angle of incidence is zero, the wavefront is parallel to the surface and its raypath is perpendicular or normal to the interface. In simple terms, it is the relationship between the satellite sensor angle and the ground surface.

 

License Type

• Field Definition:  If the image is restricted, the license type is identified in this column.

                 Values:

                      Base, ., Nextview, Enterprise, Restricted (blank if unknown)

 

Load Date

• Field Definition:  The load date refers to the date the image was loaded and made available in HDDSExplorer.

                Format:

                    YYYY/MM/DD

                Values:

                     YYYY = Year MM=Month DD=Day

 

Map Projection

• Field Definition:  A map projection is a systematic transformation of the latitudes and longitudes of locations on the surface of a sphere or an ellipsoid into locations on a plane. This field indicates which projection was used with this image.

                 Values:

                     UTM, Geographic, etc.

 

Mode

• Field Definition:  The radar acquisition mode used in acquiring the data.

 

Mosaic

• Field Definition:  Indication of mosaic availability

                 Values:

                      Yes/No

 

Number Bands

• Field Definition:  Number of bands comprising this image

 

Orbit Direction

• Field Definition:  The value indicates the direction of the satellite flight path.

                  Values:

                      Ascending

                      Descending

 

Pixel Size Units

• Field Definition:  Measurement of pixel

                 Format:

                      deg/m/ft/met or blank if unknown

                 Values:

                      degrees, meters, feet

 

Pixel Size X

• Field Definition:  The X coordinate is a given number of pixels along the horizontal axis of the image starting from the pixel 0 on the left.

 

Pixel Size Y

• Field Definition:  The Y coordinate is a given number of pixels along the vertical axis of the image starting from the pixel 0 at the top of the image.

 

Platform

• Field Definition:  Type of satellite/aircraft utilized in data collection

                 Values:

                      QuickBird

                       IKONOS

                       Aerial

                       OrbView

                       Hyperion

                       Advanced Land Imager

                       Radarsat

                       Envisat

                       Aster

                       LISS

                       LIDAR

                       CBERS

                       SACC

                       AWIFS

                       ERS

                       Formosat

                       Prism

                       AVNIR

                       PALSAR

                       AVHRR

                       MODIS

                       Aqua

                       Landsat

                      GeoPDF

                      SPOT

                      Cosmo

                      DEM

                      Terra

                      RapidEye

                      GeoEye

                      ISS

                      EO

                      WorldView

                      UKDMC

                     Map Products

                     etc.

 

Polarization

• Field Definition:  The code indicates the polarization used in acquiring the data.

                 Values:

                     HH

                     HV

                     VV

                     VH

                     HH,HV

                     VV,VH

                     HH,VV

                     HH,VH

                     VV,HV

                     HH,HV,VH,VV (quad pole)

 

Process Level

• Field Definition:  Degree of processing for this image

                 Values:

                      R = Raw, G = Geo-referenced, O = Orthorectified

 

Product Type

• Field Definition:  The product type is a brief description describing the map product record.

                Example:

                    Damage Assessment

                    Lidar Coverage

                    Flight Plans

 

Projection Zone

• Field Definition:  In reference to UTM zones, the globe is divided into 60 zones, 6 degrees of longitude wide. Zones are numbered eastward, 1 to 60, beginning at 180 degrees West longitude.

 

Restricted Data

• Field Definition:  Indicates if image is restricted to partial audience.

                Values:

                     Yes/No

 

Satellite Azimuth

• Field Definition:  The Satellite Azimuth is the angle, in degrees, measured along the horizon, between true north and the point on the horizon directly beneath the satellite. Azimuth is measured clockwise from true north, and it is always a positive number.

 

Satellite Elevation

• Field Definition:  The Satellite Elevation is the angle, measured along a vertical line, between the horizon and the satellite. Theoretically, elevation can be either a positive or a negative number; however, satellites with negative elevations are below the horizon, and hence, are invisible.

 

Sensor

• Field Definition:  Instrument sensor or camera used to collect the data

                 Values:

                     ADS40, ASTER, etc.

 

Sensor Type

• Field Definition:  Type of sensor on-board aircraft

                  Values:

                      Source:

                      HP: Hyper-spectral

                      IM: CIR Panchromatic Merge

                      IR: Color Infrared

                      MAP: Map Product

                      MS: Multi-spectral

                      OL: Natural Color

                      OM: COL Panchromatic Merge

                      PN: Panchromatic

                      RD: Radar

                      SWIR: Short-Wave Infrared

                      TR: Thermal

 

Software Version

• Field Definition:  Version number of software package, i.e.: 2.8.1

 

Source

• Field Definition:  The types of platforms that were used in generating the map product record.

Example:

Aerial

Landsat8

SPOT

DEM

DSM

Null

Sun Azimuth

• Field Definition:  Sun azimuth angle (degrees) at the WRS scene center. A positive value (+) indicates angles to the East or clockwise from North. Zero indicates North. A negative value (-) indicates angles to the West or counterclockwise from North.

                   Values:

                        -180.0000000 through +180.0000000

 

Sun Elevation

• Field Definition:  Sun elevation angle (degrees) at the WRS scene center. A positive value (+) indicates a daytime scene. Zero indicates a nighttime scene. A negative value (-) indicates a nighttime scene.

                 Values:

                      -90.0000000 through +90.0000000

Vendor

• Field Definition:  Entity supplying the data

                  Values:

                      USACE, NASA, etc.

 

Vendor Process Level

• Field Definition:  Initial level of processing supplied by vendor.

                 Values:

                      Orthorectified, Georectified, etc.

 

Vendor Scene ID

• Field Definition:  Identifier associated with the vendor

 

Version

• Field Definition:  The Version is a sequential number assigned that allows for versions of the product with one being the first version.

 

WRS Path

• Field Definition:  The WRS Path number is the longitudinal center line of a scene corresponding to the center of an orbital track. Sequential numbers from east to west are assigned. Path numbers can be used with Row numbers to designate a geographic search for a nominal scene center.

 

WRS_Row

• Field Definition:  The WRS Row Number is the latitudinal center line of a scene. This nominal configuration begins with row 1 at North 80 degrees 47 minutes and ends at row 122 at South 81 degrees 51 minutes for daylight acquisitions. Row 60 corresponds with the equator at 0 degrees latitude. A total of 248 rows are involved for all Landsat missions. Rows 123-248 are associated with night acquisitions.