Breaklines

Identification_Information:

Citation:

Citation_Information:

Originator: Bohannan Huston, Inc.
Publication_Date: 20150410
Title: Breaklines
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:

Series_Name: Santa Fe County 2014 Regional LiDAR Project
Issue_Identification: Breaklines (SFCO/USGS)

Publication_Information:

Publication_Place:

102 Grant Avenue Santa Fe, NM 87501

Publisher: Santa Fe County

Other_Citation_Details:

This dataset was created as a joint effort between Santa Fe County, the US Geological Survey, Bohannan Huston, Inc. and Aero-Graphics, Inc. in support of Santa Fe County Geographic Information Systems' mission.

Online_Linkage: http://www.santafecountynm.gov/growth_management/gis

Description:

Abstract:

Breakline features are 3D vector digital data that describe a change in the smoothness or continuity of a surface. Breaklines were developed over specific project sites to improve DEM surface modeling at these locations. A variety of slope conditions associated with these linear features were modeled and principally included bridges, retaining walls, and waterbodies. Waterbody breaklines were collected as area features and represent either 1) ponds, lakes and reservoirs greater than 2 acres in size or 2) double-line drainage features comprising perennial rivers with greater than 100 ft. nominal width. A variety of methods (e.g. stereo extraction, image object segmentation, geomorphic modeling) and sources (aerial photography and LiDAR) were used to extract breaklines which were then conditioned vertically to the LiDAR surface data. The 3 dimensional breaklines (with x/y/z coordinates) were subsequently integrated into the terrain surface modeling and LiDAR classification (point cloud class 10 (ignored ground (near a breakline)). Pond, lake, and reservoir breaklines carry a constant 3D elevation in contrast to river breaklines which are monotonic. Monotonicity assumes continuous downward sloping of river features and thus enforces consecutive vertices in the 3D data to have successively lower elevation values along the downstream orientation of the river bank breakline feature.

Purpose:

The purpose of breakline development is to support more accurate modeling of bare-earth surface data for orthorectification and terrain modeling (i.e. hydrologic flow, watershed delineation and other applications). In addition, water-surface area breaklines were collected to meet hydro flattening requirements of USGS specifications.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20140310
Ending_Date: 20140811

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: 106°15’17.2918”W
East_Bounding_Coordinate: 105°36’26.969306”W
North_Bounding_Coordinate: 36°15’10.596106”N
South_Bounding_Coordinate: 35°00’10.937276”N

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: Photogrammetry
Theme_Keyword: Planimetric
Theme_Keyword: Stereo Photogrammetry
Theme_Keyword: Orthophoto

Place:

Place_Keyword_Thesaurus: http://www.getty.edu/research/tools/vocabularies/tgn/
Place_Keyword: Santa Fe County
Place_Keyword: Rio Arriba County
Place_Keyword: Taos County
Place_Keyword: Mora County
Place_Keyword: Los Alamos County
Place_Keyword: San Miguel County
Place_Keyword: Torrance County
Place_Keyword: Sandoval County
Place_Keyword: Bernalillo County
Place_Keyword: New Mexico
Place_Keyword: United States of America

Access_Constraints: None
Use_Constraints:

Neither Santa Fe County, nor Bohannan Huston, Inc. (BHI) assumes liability for misuse of the data. Data should be used at the scale for which they were intended. No warranty, expressed, or implied, is made by Santa Fe County nor BHI regarding the utility of the data on any other system, nor shall the act of distribution constitute such warranty.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Santa Fe County
Contact_Person: Erle Wright, GISP

Contact_Position: GIS Manager
Contact_Address:

Address_Type: mailing address
Address: 102 Grant Avenue
City: Santa Fe
State_or_Province: New Mexico
Postal_Code: 87501
Country: USA

Contact_Voice_Telephone: 505-986-6350
Contact_Electronic_Mail_Address: ewright@santafecountynm.gov

Browse_Graphic:

Browse_Graphic_File_Name: sfco2014_bl.pdf
Browse_Graphic_File_Description:

View of breakline data in the vicinity of Rio Grande River and New Mexico State Road 502 with grayscale slope map background.

Browse_Graphic_File_Type: portable document format

Data_Set_Credit:

Acknowledgement of Santa Fe County GIS, the U.S. Geological Survey, Bohannan-Huston, Inc. and Aero-Graphics, Inc. would be appreciated for products derived from these data.

Native_Data_Set_Environment:

Intergraph GeoMedia Professional Ver. 14.00.0002.00088; Intergraph ERDAS IMAGINE 2014 Ver. 14.00.0100 Build 715; FME Desktop 2015.0 (Build 15244); Window 7 Enterprise SP1; ESRI Shapefile (.shp) files total ~42 MB

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Bridge, wall, and waterbody line work features were created primarily from stereo extraction from both 6-inch resolution 2014 project source photography as well as 1 m resolution NAIP photography. In addition, object segmentation for the extraction of waterbodies over NAIP areas was performed using 2014 NAIP orthophotography. Double line drainage courses were extracted from LiDAR-based geomorphic processing with visual verification over 2014 orthophoto sources to verify river bank and isolate the main river channel as a single polygon from tributary cut off segments. Elevations (z-values) for all breaklines were investigated to fit less vertically accurate 3D and/or 2D extracted breakline source data to more vertically accurate LiDAR surface information. Water surface elevations and elevations of cross section break points at river banks (for river hydro-flattening) were assessed using 1 ft contour interval data to ensure that breaklines were modeled appropriately.

Logical_Consistency_Report:

Breakline area (reference) and line feature information was verified through DEM integration and visual assessment of shaded relief imagery. Additional consistency checks included automated verification for monotonicity on river breakline features.

Completeness_Report:

Selection criteria for bridge feature locations was conducted through open source harvesting of existing bridge inventory data such as National Bridge Inventory (NBI) (http://www.fhwa.dot.gov/bridge/nbi.cfm) and Open Street Map in addition to visual assessment of bridge locations on orthophotography. Similarly, National Hydrography Dataset (NHD) (http://nhd.usgs.gov/) open source data were used to identify candidate waterbodies greater than 2 acres in size. Candidate manmade retaining wall site locations were identified primarily through analysis of slopes greater than 39 degrees near primary roads in the project area as well as visual assessment.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Tested 1.37 ft horizontal accuracy (NSSDA) (2014 SFCO Orthophotography). Tested 1.5 ft horizontal accuracy (NSSDA) (2014 SFCO LiDAR). Expected 6.5 ft horizontal accuracy (2014 NAIP).

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 6.5
Horizontal_Positional_Accuracy_Explanation:

Project LiDAR and orthophoto/planimetric sources were tested horizontally against ground control points. The value 6.5 ft is a calculated horizontal accuracy value equivalent to two pixels as the expected (ASPRS Class 1) accuracy of the NAIP (1 m) resolution orthophotography/planimetric product. NAIP source was the least accurate source utilized in the development of breakline features.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Tested 1.19 ft vertical accuracy (NSSDA) (2014 SFCO Orthophotography / Planimetrics). Tested 0.63 ft horizontal accuracy (NSSDA) (2014 SFCO LiDAR). Assumed 3.3 ft vertical accuracy (NAIP) assuming NAIP data is capable of meeting a 10 ft ASPRS Class 1 contour interval accuracy.

Quantitative_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Value: 0.63
Vertical_Positional_Accuracy_Explanation:

Since all breakline data were fit vertically to the LiDAR surface with z-values derived from the LiDAR surface model; the reported value is assumed to correspond the tested LiDAR DEM vertical accuracy.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Bohannan Huston, Inc.; Alan R. Benham, P.S.
Publication_Date: 20141027
Title: Survey Control Report for SANTA FE COUNTY

Source_Scale_Denominator: 240
Type_of_Source_Media: Portable Document Format
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20141027

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: 20140344 Santa Fe Control Report REVISED 10-27-2014 SIGNED.pdf
Source_Contribution:

Geodetic control was established for the project to provide a primary control network for LIDAR and orthophotography mapping in the project coordinate system.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Aero-Graphics Inc.
Publication_Date: 20140924
Title:

Airborne LiDAR Collection - Optech Orion H300 laser scanner with Inertial Measurement Unit (IMU) and on-board Global Positioning System (GPS).

Geospatial_Data_Presentation_Form: LiDAR Point Cloud

Source_Scale_Denominator: 600
Type_of_Source_Media: Hard drive
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20140312
Ending_Date: 20140811

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: SFCO2014_LiDAR_SWATH.shp
Source_Contribution:

LiDAR data was captured using an Optech ALTM Orion H300 LiDAR system with an inertial measurement unit (IMU) and dual frequency GPS receiver. Project acquisition with LiDAR sensors was organized into 5 acquisition blocks or “quadrants.” Quadrants 1 and 5 predominantly covered the more mountainous areas of the project with more significant relief. Quadrants 2, 3, and 4 were acquired over the primarily flatter desert areas. Data acquisition across the project was designed to achieve a 0.7 m nominal pulse spacing (NPS).

Source_Information:

Source_Citation:

Citation_Information:

Originator: Aero-Graphics Inc.
Publication_Date: 20140924
Title:

Airborne Collection - Microsoft/Vexcel UltraCam Eagle (UCE) digital camera system with Inertial Measurement Unit (IMU) and on-board Global Positioning System (GPS).

Geospatial_Data_Presentation_Form: Image

Source_Scale_Denominator: 1200
Type_of_Source_Media: Hard drive
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20140310
Ending_Date: 20140620

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: SFCO2014_PHOTO_FOOTPRINTS.shp
Source_Contribution:

Digital aerial imagery was collected at a nominal average altitude of 9,466 ft above ground level (AGL) using the Microsoft/Vexcel UltraCam Eagle (UCE) digital camera system. The UCE aerial imagery served the purpose of supporting the production of 6 inch ground sample distance (GSD) resolution digital orthoimagery for interpretive value in evaluation and development of LiDAR-elevation products.

Source_Information:

Source_Citation:

Citation_Information:

Originator: USDA Aerial Photography Field Office (APFO)
Publication_Date: 20150313
Title: National Agriculture Imagery Program (NAIP) Imagery
Geospatial_Data_Presentation_Form: Image
Online_Linkage:

http://gis.apfo.usda.gov/arcgis/services/NAIP/New_Mexico_2014_1m/ImageServer/WMSServer?

Source_Scale_Denominator: 12000
Type_of_Source_Media: online
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2014

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: New_Mexico_2014_1m_NC
Source_Contribution:

For project areas outside of the UCE aerial imagery coverage, 2014 NAIP imagery with a 1m GSD resolution was used to support interpretive value in evaluation and development of LiDAR-elevation products. In particular over these NAIP areas, imagery supported the definition of 2D polygons utilized in bridge and waterbody hydro flattening and point classification.

Process_Step:

Process_Description:

1. Breakline collection. 3D breaklines were derived through stereo interpretation of water body areas, walls, bridges and breaklines over areas of 2014 6-inch project orthophotography coverage. Bridges located outside of project orthophoto coverage were collected using NAIP imagery. Similarly waterbodies located outside of project orthophoto coverage were extracted from NAIP orthophotography. Depending upon source material, the line work was captured as either three or two dimensional lines with associated x/y/z coordinates.

Source_Used_Citation_Abbreviation: SFCO2014_LiDAR_SWATH.shp
Source_Used_Citation_Abbreviation: SFCO2014_PHOTO_FOOTPRINTS.shp
Source_Used_Citation_Abbreviation: New_Mexico_2014_1m_NC
Process_Date: 20150422

Process_Step:

Process_Description:

2. Breakline review and vertical conditioning. All collected breaklines were reviewed and assessed for their contributing value to the improvement of the bare-earth digital elevation model (DEM) production. A binary attribute was added to provide a determination of whether or not the breakline feature should be integrated into the DEM model. Only breaklines contributing to the bare-earth suface model are included in this dataset. Based on 3D analysis and review of shaded relief imagery, every breakline was assigned an individualized offset attribute value in order to optimize the 3D breaklines fit to underlying LiDAR surface data. Water body breaklines were also assessed in conjunction with 1 ft contour interval data.

Source_Used_Citation_Abbreviation: SFCO2014_LiDAR_SWATH.shp
Process_Date: 20150501

Process_Step:

Process_Description:

3. River 3D hydro flatten breakline development. A 3D monotonic river breakline dataset was constructed for hydro flattening purposes over the entire contiguous double line drainage river complex course within the project (i.e. both the Chama and Rio Grande Rivers). Starting with a geomorphologically defined 2D polygon, the polygon vertices were densified by 1 ft in order to construct the 3D breakline data. Methodologies were developed to automatically develop (from 1 ft contours) river crossing transect guidelines at location were 1 ft contours entered the river bank feature. The river breakline data were used to create a flat river surface model which was integrated into hydro flattened DEM data with incorporation of non-water islands into the final DEM processing.

Source_Used_Citation_Abbreviation: SFCO2014_LiDAR_SWATH.shp
Process_Date: 20150501

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 6136

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: 3002
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9999
Longitude_of_Central_Meridian: -106.25
Latitude_of_Projection_Origin: 31.0
False_Easting: 1640416.667
False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:

Abscissa_Resolution: 0.01
Ordinate_Resolution: 0.01

Planar_Distance_Units: Survey Feet

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983 (HARN)
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.257222101

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 0.001
Altitude_Distance_Units: Feet
Altitude_Encoding_Method: Implicit coordinate

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: .dbf
Entity_Type_Definition: Shapefile Attribute Table
Entity_Type_Definition_Source:

http://www.ndep.gov/NDEP_Elevation_Guidelines_Ver1_10May2004.pdf

Attribute:

Attribute_Label: FID
Attribute_Definition: Internal feature
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Santa Fe County
Contact_Person: Erle Wright, GISP

Contact_Position: GIS Manager
Contact_Address:

Address_Type: mailing address
Address: 102 Grant Avenue
City: Santa Fe
State_or_Province: New Mexico
Postal_Code: 87501
Country: USA

Contact_Voice_Telephone: 505-986-6350
Contact_Electronic_Mail_Address: ewright@santafecountynm.gov

Resource_Description: Hard drive
Distribution_Liability:

The County of Santa Fe, New Mexico, is furnishing these geographic data on an "as is" basis, and Santa Fe County makes no guarantee, representation or warranty concerning the accuracy or completeness of information contained in the geographic data. Santa Fe County further makes no guarantees, representations or warranties, either expressed or implied, as to any other matter whatsoever concerning the data and product, including, without limitation, the condition of the product, or its fitness for any particular use or purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of Bohannan Huston, Inc. (BHI) and served by Santa Fe County, no guarantee, representation or warranty, either expressed or implied, is made by Santa Fe County or BHI regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such guarantee, representation or warranty. In no event shall Santa Fe County or BHI have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by Santa Fe County.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ESRI Shapefile
Format_Information_Content: ARCZ

Digital_Transfer_Option:

Offline_Option:

Offline_Media: Hard Drive
Recording_Format: ISO 9660

Fees:

Fees are based on the cost of time and materials, per the Public Records Act and Ordinance #2009-6 "Data Fee Ordinance" in effect as of July 30, 2009.

Ordering_Instructions:

http://www.santafecountynm.gov/growth_management/gis/gis_products

Breaklines

Metadata: