Area_2_bald_earth_DTM

 

Identification_Information:

                Citation:

                                Citation_Information:

                                                Originator: USACE, Albuquerque District

                                                Publication_Date: Unpublished material

                                                Publication_Time: Unknown

                                                Title: Digital Mapping - Bernalillo County, New Mexico

                                                Geospatial_Data_Presentation_Form: map

                                                Publication_Information:

                                                                Publication_Place: Bohannan Huston, Inc., Albuquerque, NM

                                                                Publisher: USACE, Albuquerque District

                Description:

                                Abstract:

                                                As specified by the contract, ASPRS Large Map

                                                Class One standard "bald earth" DTM's and

                                                CADD files containing contours of the DTM's at a two (2)

                                                foot interval, were created for areas in Bernalillo

                                                County, New Mexico.

                                                All data are geo-referenced to the New Mexico State Plane

                                                Coordinate Grid System, Central Zone, NAD83, NAVD88.

                                                The bald earth data is derived from an aerial LIDAR survey

                                                conducted at 3m postings over the month of August, 1999.

                                                The raw LIDAR survey was processed by a remote

                                                sensing filter to remove most vegetation and structure

                                                information from the data set.  At this point the surface was

                                                thinned using an Intergraph SiteWorks DTM thinning utility

                                                which removed redundant surface point information at a

                                                vertical tolerance of .15' within a 20' radius. The thinned

                                                LIDAR surface data was photogrammetrically

                                                supplemented with breakline information generated from

                                                stereo photograph pairs exposed over the project area

                                                during the same time frame.  During this process, the

                                                removal of vegetation and permanent structure information

                                                was checked and corrected as necessary.

                                                The data sets are clipped into 5000' by 5000' tiles with an

                                                overedge of 50' for manageability.

                                               

                                Purpose:

                                                The data provided by this contract will be used by a variety

                                                drainage and roadway studies, site planning studies,

                                                property tax assessment, and other complex surface and

                                                sub-surface studies and investigations.

                                                The surface data will be used for engineering analysis and

                                                to digitally extract geometric data (cross sections, profiles,

                                                etc.) for use in hydraulic, geotechnical, and sedimentation

                                                computer models.

                Time_Period_of_Content:

                                Time_Period_Information:

                                                Range_of_Dates/Times:

                                                                Beginning_Date: 19990605

                                                                Ending_Date: 19990731

                                Currentness_Reference: Ground Condition

                Status:

                                Progress: In work

                                Maintenance_and_Update_Frequency: None planned

                Spatial_Domain:

                                Bounding_Coordinates:

                                                West_Bounding_Coordinate: -107.702416

                                                East_Bounding_Coordinate: -106.411967

                                                North_Bounding_Coordinate: +35.082134

                                                South_Bounding_Coordinate: +34.515990

                Keywords:

                                Theme:

                                                Theme_Keyword_Thesaurus: None

                                                Theme_Keyword: digital mapping

                                                Theme_Keyword: digital terrain model

                                                Theme_Keyword: LIDAR

                                                Theme_Keyword: photogrammetry

                                                Theme_Keyword: bald earth

                                Place:

                                                Place_Keyword_Thesaurus: None

                                                Place_Keyword: New Mexico

                                                Place_Keyword: Bernalillo County

                Access_Constraints: unknown

                Use_Constraints: unknown

                Point_of_Contact:

                                Contact_Information:

                                                Contact_Organization_Primary:

                                                                Contact_Organization: Bohannan Huston, Inc.

                                                                Contact_Person: Dennis Sandin

                                                Contact_Position: Spatial Data Systems Manager

                                                Contact_Address:

                                                                Address_Type: mailing and physical address

                                                                Address:

                                                                                Courtyard I

                                                                                7500 Jefferson NE

                                                                City: Albuquerque

                                                                State_or_Province: NM

                                                                Postal_Code: 87109

                                                Contact_Voice_Telephone: (505) 823-1000

                                                Contact_Facsimile_Telephone: (505) 798-7932

                                                Contact_Electronic_Mail_Address: dsandin@bhinc.com

Spatial_Reference_Information:

                Horizontal_Coordinate_System_Definition:

                                Planar:

                                                Grid_Coordinate_System:

                                                                Grid_Coordinate_System_Name: State Plane Coordinate System 1983

                                                                State_Plane_Coordinate_System:

                                                                                SPCS_Zone_Identifier: Central 3002

                                                                                Transverse_Mercator:

                                                                                                Scale_Factor_at_Central_Meridian: 0.9999000000

                                                                                                Longitude_of_Central_Meridian: -106.150000

                                                                                                Latitude_of_Projection_Origin: +31.000000

                                                                                                False_Easting: 1640416.6667

                                                                                                False_Northing: 0.0000

                                                Planar_Coordinate_Information:

                                                                Planar_Coordinate_Encoding_Method: coordinate pair

                                                                Coordinate_Representation:

                                                                                Abscissa_Resolution: unknown

                                                                                Ordinate_Resolution: unknown

                                                                Planar_Distance_Units: Survey Feet

                                Geodetic_Model:

                                                Horizontal_Datum_Name: North American Datum of 1983

                                                Ellipsoid_Name: Clarke 1866

                                                Semi-major_Axis: 6378137.0000

                                                Denominator_of_Flattening_Ratio: 298.25722210

                Vertical_Coordinate_System_Definition:

                                Altitude_System_Definition:

                                                Altitude_Datum_Name: North American Vertical Datum of 1988

                                                Altitude_Resolution: 1

                                                Altitude_Distance_Units: Feet

                                                Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates

Metadata_Reference_Information:

                Metadata_Date: 20000417

                Metadata_Contact:

                                Contact_Information:

                                                Contact_Organization_Primary:

                                                                Contact_Organization: Bohannan Huston, Inc.

                                                                Contact_Person: Dennis Sandin

                                                Contact_Address:

                                                                Address_Type: mailing and physical address

                                                                Address:

                                                                                Courtyard I

                                                                                7500 Jefferson NM

                                                                City: Albuquerque

                                                                State_or_Province: NM

                                                                Postal_Code: 97109

                                                Contact_Voice_Telephone: (505) 823-1000

                                                Contact_Facsimile_Telephone: (505) 798-7932

                                                Contact_Electronic_Mail_Address: dsandin@bhinc.com

                Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

                Metadata_Standard_Version: June 8, 1994