Contours

File Geodatabase Feature Class

Tags
topography, Bismarck, County, Lincoln, one-foot contours, contours, Morton, North Dakota, elevations, Burleigh, surface data, City, Mandan, bare earth, terrain data

Description

The Bare Earth DTM was developed from LAS points and breaklines collected from a LiDAR flight flown in the Spring of 2013, as part of the Bismarck-Mandan Metropolitan Planning Organization (MPO) 2013 Project. The DTM is used to develop a TIN (Triangulated Irregular Network). One-foot contours meeting National Map Accuracy Standards were generated from the TIN.

Summary

The 2013 one-foot contours were developed as a derivative product for use in general surface modeling and depiction. File format: ESRI Geodatabase. Contours are delineated by type; index, intermediate, index depression, intermediate depression.

Credits

Use limitations

To be determined by client

Scale Range

Metadata 

Topics and Keywords 

Themes or categories of the resource  elevation


*Content type  Downloadable Data


Place keywords  Bismarck, County, Lincoln, Morton, North Dakota, Burleigh, City, Mandan

Theme keywords  topography, one-foot contours, contours, elevations, surface data, bare earth, terrain data

Citation 

*Title Contours
Publication date
Indeterminate date inapplicable
Indeterminate time unknown


Presentation formats  digital map
FGDC geospatial presentation format  vector digital data


Resource Details 

Dataset languages  English (UNITED STATES)


Status  completed
Spatial representation type  vector


Supplemental information
*Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1.4959


*Name Contours

Extents 

Extent
Description
ground condition

Temporal extent
Date and time 2013-05-02

Temporal extent
Date and time 2013-05-03

Vertical extent
*Minimum value 1614.000000
*Maximum value 2322.000000


Extent
Geographic extent
Bounding rectangle
Extent type  Extent used for searching
*West longitude -101.097608
*East longitude -100.578073
*North latitude 46.986607
*South latitude 46.654635
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude 1819353.319882
*East longitude 1948899.120079
*South latitude 360862.059383
*North latitude 481378.169948
*Extent contains the resource Yes

Resource Points of Contact 

Point of contact
Individual's name Steve Saunders
Organization's name City of Bismarck
Contact's position Transportation Planner
Contact's role  point of contact


Contact information
Address
Delivery point 221 N 5th St
City Bismarck
Administrative area North Dakota
Postal code 58501
Country U.S.A.



Resource Maintenance 

Resource maintenance
Update frequency  not planned


Resource Constraints 

Legal constraints
Other constraints
To be determined by client

Constraints
Limitations of use
To be determined by client

Spatial Reference 

ArcGIS coordinate system
*Type Projected
*Geographic coordinate reference GCS_North_American_1983_HARN
*Projection NAD_1983_HARN_StatePlane_North_Dakota_South_FIPS_3302_Feet_Intl
*Coordinate reference details
Projected coordinate system
Well-known identifier 2910
X origin -117105300
Y origin -98987500
XY scale 3048
Z origin -100000
Z scale 3048.0060960121923
M origin -100000
M scale 10000
XY tolerance 0.01
Z tolerance 0.01
M tolerance 0.001
High precision true
Latest well-known identifier 2910
Well-known text PROJCS["NAD_1983_HARN_StatePlane_North_Dakota_South_FIPS_3302_Feet_Intl", GEOGCS["GCS_North_American_1983_HARN", DATUM["D_North_American_1983_HARN", SPHEROID["GRS_1980", 6378137.0, 298.257222101]], PRIMEM["Greenwich", 0.0], UNIT["Degree", 0.0174532925199433]], PROJECTION["Lambert_Conformal_Conic"], PARAMETER["False_Easting", 1968503.937007874], PARAMETER["False_Northing", 0.0], PARAMETER["Central_Meridian", -100.5], PARAMETER["Standard_Parallel_1", 46.18333333333333], PARAMETER["Standard_Parallel_2", 47.48333333333333], PARAMETER["Latitude_Of_Origin", 45.66666666666666], UNIT["Foot", 0.3048], AUTHORITY["EPSG", 2910]], VERTCS["NAVD_1988", VDATUM["North_American_Vertical_Datum_1988"], PARAMETER["Vertical_Shift", 0.0], PARAMETER["Direction", 1.0], UNIT["Foot_US", 0.3048006096012192]]

Reference system identifier
*Value 2910
*Codespace EPSG
*Version 8.6.2


Spatial Data Properties 

Indirect spatial referencing
None


Vector
*Level of topology for this dataset  geometry only


Geometric objects
Feature class name Contours
*Object type  composite
*Object count 1664229



ArcGIS Feature Class Properties
Feature class name Contours
*Feature type Simple
*Geometry type Polyline
*Has topology FALSE
*Feature count 1664229
*Spatial index TRUE
*Linear referencing FALSE



Data Quality 

Scope of quality information
Resource level  dataset




Data quality report - Completeness omission
Evaluation method
The vector data covers all of the Bismarck-Mandan Metropolitan Planning Organization (MPO) project area with no gaps or omissions.





Data quality report - Topological consistency
Evaluation method
The data set is topologically structured line data with no gaps or omissions.





Data quality report - Conceptual consistency
Measure description
The data set is topologically structured line data with no gaps or omissions.





Data quality report - Completeness omission
Measure description
The vector data covers all of the Bismarck-Mandan Metropolitan Planning Organization (MPO) project area with no gaps or omissions.





Data quality report - Quantitative attribute accuracy


Data quality report - Absolute external positional accuracy
Dimension vertical


Measure description
Contours are accurate to National Map Accuracy Standards for 1" = 50' scale mapping.





Lineage 

Process step
Description
LiDAR processing utilizes several software packages, including GeoCue and the TerraSolid suite of processing components. The GeoCue software is a database management system for housing the LiDAR dataset (usually multiple gigabytes in size). GeoCue incorporates a thorough checklist of processing steps and quality assurance/quality control (QA/QC) procedures that assist in the LiDAR workflow. The TerraSolid software suite is used to automate the initial classification of the LiDAR point cloud based on a set of predetermined parameters. Lidar technicians refer to ground cover research (natural and cultural features) within the project area and determine algorithms most suitable for the initial automated LiDAR classification. (Some algorithms/filters recognize the ground in forests well, while others have greater capability in urban areas). During this process each point is given an initial classification (e.g., as ground, vegetation, or noise) based on the point's coordinates and the relation to its neighbors. Classifications to be assigned include all those outlined by ASPRS standards. The initial classifications produce a coarse and inexact dataset, but offer an adequate starting point for the subsequent manual classification procedure. During this step, "overlap" points are automatically classified (those originating from neighboring flightlines) using information gathered from the ABGPS and IMU data. Any duplicate points existing from adjacent flightlines are removed during this process. Hydrographic breaklines are collected using LiDARgrammetry to ensure hydroflattened water surfaces. This process involves manipulating the LiDAR data's intensity information to create a metrically sound stereo environment. From this generated "imagery", breaklines are photogrammetrically compiled. Breakline polygons are created to represent open water bodies. The LiDAR points that fall within these areas are classified as "water." Breaklines representing streams and rivers shall be smooth, continuous, and monotonic, and represent the water surface without any stair steps except for dams and rapids. All hydrographic breaklines include a 1 foot buffer, with the points being re-classified as Class 10 (ignored ground). TerraSolid is further used for the subsequent manual classification of the LiDAR points allowing technicians to view the point cloud in a number of ways to ensure accuracy and consistency of points and uniformity of point coverage. A triangulated irregular network (TIN) model was created from the Bare Earth LAS and breaklines. The TIN was processed to create one-foot contours.



Process contact
Organization's name Ayres Associates
Contact's role  processor


Contact information
Phone
Voice (608) 443-1200
Fax (608) 443-1250

Address
Type both
Delivery point 5201 E. Terrace Drive, Suite 200
City Madison
Administrative area WI
Postal code 53718
Country US





Source data
Source citation
Publication date
Indeterminate date inapplicable
Indeterminate time unknown




Extent of the source data
Description
ground condition

Temporal extent
Date and time
Indeterminate date unknown
Indeterminate time unknown



Distribution 

Distribution format
*Name File Geodatabase Feature Class


Fields 

Details for object Contours 
*Type Feature Class
*Row count 1664229


Field OBJECTID
 
*Alias OBJECTID
*Data type OID
*Width 4
*Precision 0
*Scale 0
*Field description
Internal feature number.

*Description source
ESRI

*Description of values
Sequential unique whole numbers that are automatically generated.





Field Shape
 
*Alias SHAPE
*Data type Geometry
*Width 0
*Precision 0
*Scale 0
Field description
Feature geometry.

Description source
ESRI

Description of values
Coordinates defining the features.





Field SHAPE_Length
 
*Alias SHAPE_Length
*Data type Double
*Width 8
*Precision 0
*Scale 0
*Field description
Length of feature in internal units.

*Description source
ESRI

*Description of values
Positive real numbers that are automatically generated.





Field Type
 
*Alias Type
*Data type String
*Width 50
*Precision 0
*Scale 0




Field Elevation
 
*Alias Elevation
*Data type SmallInteger
*Width 2
*Precision 0
*Scale 0






Metadata Details 

Metadata language English (UNITED STATES)


Scope of the data described by the metadata  dataset
Scope name* dataset


*Last update 2016-02-26


ArcGIS metadata properties
Metadata format ArcGIS 1.0


Created in ArcGIS for the item 2013-08-15 12:04:35
Last modified in ArcGIS for the item 2016-02-26 11:23:12


Automatic updates
Have been performed Yes
Last update 2016-02-26 11:23:12


Metadata Contacts 

Metadata contact
Organization's name Ayres Associates
Contact's role  point of contact


Contact information
Phone
Voice 608) 443-1200
Fax 608) 443-1250

Address
Type both
Delivery point 5201 E. Terrace Drive, Suite 200
City Madison
Administrative area Wisconsin
Postal code 53718