Contours (1:24,000) for any County, Mississippi - 2014

Metadata:


Identification_Information:

Citation:

Citation_Information:

Originator: Mississippi Automated Resource Information System (MARIS)

Publication_Date: 2014

Title:

Contours (1:24,000) for (any) County, Mississippi - 2014

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage: http:\\www/maris.state.ms.us/DownloadData/Contours.html

Description:

Abstract:

Mississippi 1:24,000 USGS topographic hypsography contours. Contour intervals are 5, 10, or 20 feet depending on the area of the state. Supplemental contours (where applicable) are 5 or 10 feet. **** Note: During September 2014, MARIS staff reevaluated all county contour files. The TYPE attribute was checked to make sure coding was correct for 1- Index, 2 Intermediate, and 3 Supplemental. During this process, edits were also made for any errors in elevation that were easily recognized. A statewide file is now available along with a Map Service for this layer. **********

Purpose:

Provide 1:24,000 contours by county for use in generating 10 m DEMS

Supplemental_Information:

The information in this file is the same for all counties. Only the bounding coordinates have changed. Note: In creating this layer for use in the development of a hydrologically correct Digital Elevation Model, additional contour lines were occasionally added and some values of elevations were coded differently from the quadrangle maps. This occurred where the quadrangle maps provided insufficient data to generate a smooth model.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1964

Ending_Date: 1996

Currentness_Reference:

publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -89.512180

East_Bounding_Coordinate: -89.012699

North_Bounding_Coordinate: 33.745019

South_Bounding_Coordinate: 33.454329

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: contour

Theme_Keyword: elevation

Theme_Keyword: hypsography

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: Mississippi

Place_Keyword: USA

Access_Constraints: none

Use_Constraints:

Data users are encouraged to read this metadata record to better comprehend and utilize the described data set. MARIS should be recognized as a source data provider on all data derived from this data set. The data are not survey products and not intended for legal use.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Mississippi Automated Resource Information System (MARIS)

Contact_Person: Steve Walker

Contact_Position: GIS Operations Manager

Contact_Address:

Address_Type: mailing and physical address

Address:

3825 Ridgewood Road

City: Jackson

State_or_Province: MS

Postal_Code: 39211-6453

Country: USA

Contact_Voice_Telephone: (601) 432-6149

Contact_Facsimile_Telephone: (601) 432-6893

Contact_Electronic_Mail_Address: swalker@ihl.state.ms.us

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350

Back to Top


Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Attribute values were validated via cross-checks with existing data resources including photographs, maps, imagery, and scientific reports.

Logical_Consistency_Report:

All line work is checked for topological integrity and to ensure that polygons are fully enclosed, no duplicate lines or points exists, line segments are composed of sequentially numbered coordinate pairs, intersecting lines are separated by a node, and no dangling lines exist. Topological checks and structuring are performed using the ArcInfo software. Data dictionary specifications are automatically implemented via the ESRI Info database management software. Data collected from external data providers are randomly verified.

Completeness_Report:

The data are complete with respect to the data publication date and scale.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Feature locations were validated via cross-checks with existing data resources including photographs, maps, imagery, and scientific reports.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 1996

Title:

Elevation Contour Mylar Separates / Hypsography

Geospatial_Data_Presentation_Form: map

Source_Scale_Denominator: 24000

Type_of_Source_Media: stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1964

Ending_Date: 1996

Source_Currentness_Reference:

publication date

Source_Citation_Abbreviation:

Elevation Contours/Hypsography

Source_Contribution:

Primary Source of data

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 2002

Title:

Digital Raster Graphics

Geospatial_Data_Presentation_Form: raster digital data

Source_Scale_Denominator: 24000

Type_of_Source_Media: CD-ROM

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1996

Ending_Date: 2002

Source_Currentness_Reference:

publication date

Source_Citation_Abbreviation:

DRGs

Source_Contribution:

Digital source to verify elevation values in feet msl from the topographic maps

Source_Information:

Source_Citation:

Citation_Information:

Originator: MARIS

Publication_Date: 2006

Title:

County Border

Geospatial_Data_Presentation_Form: vector digital data

Other_Citation_Details:

This data was generated by moving 1990 TIGER files to match the 1:24,000 DRG borders.

Online_Linkage: http://www.maris.state.ms.us

Source_Scale_Denominator: 24000

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2007

Source_Currentness_Reference:

publication date

Source_Citation_Abbreviation:

County Border

Source_Contribution:

Used in clipping the digital elevation model

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 2001

Title:

NED DEM

Geospatial_Data_Presentation_Form: raster digital data

Source_Scale_Denominator: 24000

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2001

Source_Currentness_Reference:

publication date

Source_Citation_Abbreviation:

National Elevation Dataset 30 meter Digital Elevation Model

Source_Contribution:

Used to compare the elevation values of the new 10 meter DEMs

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Department of Agriculture

Publication_Date: 2006

Title:

National Agricultural Inventory Program - 2006

Geospatial_Data_Presentation_Form: remote-sensing image

Source_Scale_Denominator: 24000

Type_of_Source_Media: CD-ROM

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2006

Source_Currentness_Reference:

publication date

Source_Citation_Abbreviation:

NAIP

Source_Contribution:

The 2006 NAIP data was used in some situations where the NHD dataset did not match the contour line work. The aerial photography was used to help edit the contour line work and NHD line work to more closely match the actual hydrography on the ground

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 1996

Title:

Topographic Maps

Geospatial_Data_Presentation_Form: map

Source_Scale_Denominator: 24000

Type_of_Source_Media: paper

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1964

Ending_Date: 1996

Source_Currentness_Reference:

publication date

Source_Citation_Abbreviation:

1:24,000 Topographic Maps

Source_Contribution:

Used in original coding of elevations.

Process_Step:

Process_Description:

The 1:24,000 contour Mylar separates were scanned at 1000 dpi. They were brought into Hitachi's Cad/Core software to vectorize. The .tic and .lin files generated from Cad/Core were brought into a blank UTM coverage for transformation. The file was then projected into the MSTM projection. The lines were then cleaned and dangles corrected. The lines were then coded for elevation, contour type, and depression/hilltop using the separates and the paper 1:24,000 topographic maps. The quads that make up a county were then appended and clipped using a one mile buffer of the county border.

Source_Used_Citation_Abbreviation:

Contours

Source_Used_Citation_Abbreviation:

Topo Maps

Process_Date: 2004

Process_Step:

Process_Description:

The existing 1:24,000 contour quadrangle vector coverages were converted into vector shapefiles. The contours for a county were appended. A 400 meter county border buffer was created. The contours for a county were clipped on this 400 meter buffer to ensure a smooth model at the border. Using the 3-D Analyst Topo-to-Raster command, a 10 meter digital elevation model (DEM) was generated. The resulting DEM was inspected for anomalies using a visual inspection in ArcMap of the grey-scaled image. Breaks in the contour lines between the quadrangles were edge matched. Any elevation value discrepancies were also fixed and/or addressed at these areas. A new DEM was generated and clipped on the county border (with a 10 meter buffer to ensure a smooth mosaic with surrounding counties). The resulting DEM was compared with the established USGS National Elevation Dataset (NHD) 30 Meter DEM. Using the Spatial Analyst MINUS command, a difference GRID was generated. This was used to find extreme elevation differences between the 30 meter DEM and the new 10 meter DEM. Errors in elevation were verified using the DRGs, changes made, and a new DEM generated. Using the 3-D Analyst HillShade command, a 3-D surface was generated. Overlaying the  NHD line work and polygons, visual inspection was made by MARIS staff to check for spikes, dips, and other discrepancies in the model. Potential errors in the elevations were then verified or discounted using the DRGs as a background layer. There were instances where the NHD was edited to more correctly match the 2006 NAIP aerial photography. This was in situations where the NHD dataset conflicted with both the contour line work and the imagery in a severe manner. Once this process was complete, a new 10 meter DEM was generated using the contour file, NHD stream and polygonal water bodies, and 1:24,000 county border file as input into the 3-D Analyst Topo-to-Raster command. Both the DEM and the contour vector file were sent to USGS/NGTOC III for inspection. Their staff performed a QA review of the data for completeness and accuracy in topographic characterization. In addition, a statistical sampling of vertical accuracy was performed by USGS/NGTOC III to ensure the vertical accuracy was met. Any deficiencies/errors noted in a given county data set was returned to MARIS via x,y coordinates and a description of each error. These changes to the contour shapefile were made by MARIS staff and a new DEM generated. This procedure continued until inspection of the DEM resulted in a few errors in elevation values in a county. At that point, those changes were made and the final 10 meter DEM was generated. The data was then readied for publication on the MARIS web site as well as distributed to the USGS for possible inclusion in the NED system. **** Note: During September 2014, MARIS staff reevaluated all county contour files. The TYPE attribute was checked to make sure coding was correct for 1- Index, 2 Intermediate, and 3 Supplemental. During this process, edits were also made for any errors in elevation that were easily recognized. A statewide file is now available along with a Map Service for this layer. **********

Source_Used_Citation_Abbreviation:

DRGs

Source_Used_Citation_Abbreviation:

County Border

Source_Used_Citation_Abbreviation:

NAIP

Process_Date: 2007, 2014

Back to Top


Spatial_Data_Organization_Information:

Indirect_Spatial_Reference_Method:

FIPS = 28 (Mississippi)

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String

Point_and_Vector_Object_Count: 13941

Back to Top


Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Transverse Mercator

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999834

Longitude_of_Central_Meridian: -89.750000

Latitude_of_Projection_Origin: 32.500000

False_Easting: 500000.000000

False_Northing: 1300000.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000001

Ordinate_Resolution: 0.000001

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257222

Back to Top


Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: cont<FIPS>

Entity_Type_Definition:

1:24,000 contours by county

Entity_Type_Definition_Source:

MARIS

Attribute:

Attribute_Label: FID

Attribute_Definition:

Internal feature number.

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.

Attribute:

Attribute_Label: LENGTH

Attribute_Definition:

Length of segment in meters

Attribute_Definition_Source:

ESRI, MARIS

Attribute_Domain_Values:

Unrepresentable_Domain:

measurement

Attribute:

Attribute_Label: ELEVATION

Attribute_Definition:

Elevation of segment in feet

Attribute_Definition_Source:

USGS

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 900

Attribute_Units_of_Measure: feet

Attribute:

Attribute_Label: TYPE

Attribute_Definition:

Type of contour

Attribute_Definition_Source:

USGS, MARIS

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1

Enumerated_Domain_Value_Definition:

Index contour

Enumerated_Domain_Value_Definition_Source:

USGS, MARIS

Enumerated_Domain:

Enumerated_Domain_Value: 2

Enumerated_Domain_Value_Definition:

Intermediate contour

Enumerated_Domain_Value_Definition_Source:

USGS, MARIS

Enumerated_Domain:

Enumerated_Domain_Value: 3

Enumerated_Domain_Value_Definition:

Supplemental contour

Enumerated_Domain_Value_Definition_Source:

USGS, MARIS

Attribute:

Attribute_Label: DEPORHL

Attribute_Definition:

Depression or hilltop

Attribute_Definition_Source:

USGS, MARIS

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 0

Enumerated_Domain_Value_Definition:

Hilltop

Enumerated_Domain_Value_Definition_Source:

USGS, MARIS

Enumerated_Domain:

Enumerated_Domain_Value: 1

Enumerated_Domain_Value_Definition:

Depression

Enumerated_Domain_Value_Definition_Source:

USGS, MARIS

Back to Top


Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Steve Walker

Contact_Organization: Mississippi Automated Resource Information System (MARIS)

Contact_Position: GIS Operations Manager

Contact_Address:

Address_Type: mailing and physical address

Address:

3825 Ridgewood Road

City: Jackson

State_or_Province: MS

Postal_Code: 39211-6453

Country: USA

Contact_Voice_Telephone: 601.432.6149

Contact_Facsimile_Telephone: 601.432.6893

Contact_Electronic_Mail_Address: swalker@ihl.state.ms.us

Hours_of_Service: 8:00 a.m. - 4:00 p.m. CST

Resource_Description: Countywide Elevation grid for Mississippi

Distribution_Liability:

The information contained in this catalog and data distributed by the Board of Trustees / Institutions of Higher Learning's MARIS Technical Center (MTC) is derived from a variety of public and private sector sources considered  to be dependable, but the accuracy, completeness, and currency thereof are not guaranteed. The IHL/MTC makes no warranties, expressed or implied as to the accuracy, completeness, currency, reliability, or suitability for any particular purpose of information or data contained in or generated from the state geographic database. Additionally, the State of Mississippi, the Board of  Trustees for IHL or any employee thereof assume no liability associated with the use of these data.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCE (ArcInfo export ), ArcGIS (shapefile)

File_Decompression_Technique: TAR, WinZip

Transfer_Size: 21.736

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://www.maris.state.ms.us/Data_Warehouse/Download_Data/download_data.html

Offline_Option:

Offline_Media: CD-ROM

Recording_Format: CD Write

Fees: Direct downloads and CDs of standard MARIS products are available free of charge

Back to Top


Metadata_Reference_Information:

Metadata_Date: 20070927

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Mississippi Automated Resource Information System (MARIS)

Contact_Person: Steve Walker

Contact_Position: GIS Operations Manager

Contact_Address:

Address_Type: mailing and physical address

Address:

3825 Ridgewood Road

City: Jackson

State_or_Province: MS

Postal_Code: 39211-6453

Country: USA

Contact_Voice_Telephone: (601) 432-6149

Contact_Facsimile_Telephone: (601) 432-6893

Contact_Electronic_Mail_Address: swalker@ihl.state.ms.us

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Access_Constraints: none

Metadata_Use_Constraints:

none

Metadata_Extensions:

Online_Linkage: http://www.esri.com/metadata/esriprof80.html

Profile_Name: ESRI Metadata Profile

Metadata_Extensions:

Online_Linkage: http://www.esri.com/metadata/esriprof80.html

Profile_Name: ESRI Metadata Profile

Back to Top