2.5-minute Digital Elevation Model (DEM) for the Conterminous U.S.

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: The PRISM Climate Group at Oregon State University

Publication_Date: 199504

Title:

2.5-minute Digital Elevation Model (DEM) for the Conterminous U.S.

Geospatial_Data_Presentation_Form: raster digital data

Publication_Information:

Publication_Place: Corvallis, Oregon ,USA

Publisher: The PRISM Climate Group at Oregon State University

Description:

Abstract:

This digital elevation grid is used by PRISM (Parameter-elevation Regressions on Independent Slopes Model) to generate US precipitation and temperature maps. The DEM originated with the EROS Data Center's 3-arc-second DEM's for the U.S. The DEM's were then mosaiced and resampled to 15-arc-second, and finally a modified Barnes filter (Barnes, 1964) was applied to the 15-arc-second coverage to smooth the DEM to 2.5-arc-minute resolution. For more information on the EROS Data Center 3-arc-second DEM, go to

<URL:http://edcwww.cr.usgs.gov/Webglis/glisbin/guide.pl/glis/hyper/guide/usgs_dem>.

Purpose:

This DEM provides a useful reference point from which to interpret the precipitation and temperature patterns, and is a clean coverage that can be used for other purposes. Also, we especially encourage those of you who are reprojecting the PRISM maps into other coordinate systems to accompany the maps with the DEM.

Supplemental_Information:

If you already have a DEM in your working projection/resolution, differences between the two DEMs (once the PRISM DEM is reprojected) may give you a feel for uncertainties introduced through (1) reprojection; (2) changes in resolution; and (3) basic differences in origins of the two DEMs. Keep in mind that the PRISM coverages reflect the characteristics of the DEM used, and may not reflect your DEM terrain patterns.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1995

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -125.0208333

East_Bounding_Coordinate: -66.47916666

North_Bounding_Coordinate: 49.9375

South_Bounding_Coordinate: 24.0625

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: raster data

Theme_Keyword: DEM

Theme_Keyword: Digital Elevation Model

Theme_Keyword: grid cell

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Conterminous USA

Access_Constraints: No restrictions apply

Use_Constraints:

Acknowledgement of the The PRISM Climate Group and Oregon Climate Service at Oregon State University.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Wayne Gibson

Contact_Organization: The PRISM Climate Group, Oregon State University

Contact_Position: Senior Research Assistant

Contact_Address:

Address_Type: mailing address

Address: 2001 Kelley Engineering Center

City: Corvallis

State_or_Province: Oregon

Postal_Code: 97331-2209

Country: USA

Contact_Voice_Telephone: (541) 737-2531

Contact_Electronic_Mail_Address: gibson@nacse.org

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.1.2.671

Data_Quality_Information:

Completeness_Report:

A modified Barnes filter (Barnes, 1964) was applied to the UGSG 15-arc-second coverage to smooth the DEM to 2.5-arc-minute resolution.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Accuracy of this data set is based on the original specification of the Defense Mapping Agency (DMA) 1 degree digital elevation models (DEM). The stated accuracy of the original DEMs are 130 m circular error with 90% probability.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 130 m with 90% probability.

Horizontal_Positional_Accuracy_Explanation: The broad DMA production objective for 1-degree DEM's.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: United States Geological Survey (USGS)

Title: 1:250,000 Digital Elevation Models

Publication_Information:

Publication_Place: USA

Publisher: United States Geological Survey (USGS)

Type_of_Source_Media: digital files

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1967

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: DEM

Source_Contribution: grid cells representing elevation above sea level

Process_Step:

Process_Description:

It is beyond the scope of this metadata to document the processes involved in generating the 2.5-min DEM from the 15-sec DEM. However, the technique is well documented in Barnes, S.L. 1964. A technique for maximizing details in numerical weather map analysis. Journal of Applied Meteorology, 3: 396-409.

Process_Step:

Process_Description: Metadata imported.

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 621

Column_Count: 1405

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0416666666

Longitude_Resolution: 0.0416666666

Geographic_Coordinate_Units: Decimal degrees

Planar:

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 0.041667

Ordinate_Resolution: 0.041667

Geodetic_Model:

Horizontal_Datum_Name: World Geodetic Spheroid 1972 (WGS 1972)

Ellipsoid_Name: WGS72

Semi-major_Axis: 6378135.0

Denominator_of_Flattening_Ratio: 298.26

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: elevation above mean sea level

Attribute:

Attribute_Label: Value

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -73

Range_Domain_Maximum: 4005

Attribute_Units_of_Measure: meters

Attribute_Measurement_Resolution: 1

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: -999

Enumerated_Domain_Value_Definition: no data available or outside of range domain

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Value

Attribute:

Attribute_Label: Count

Overview_Description:

Entity_and_Attribute_Overview:

Cell values are elevation above mean sea level in meters rounded to the nearest integer.

Distribution_Information:

Resource_Description: Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

File_Decompression_Technique: GNU zip

Transfer_Size: 874Kb

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <URL:ftp://ftp.ncdc.noaa.gov/pub/data/prism100/us_25m.dem.gz>

Metadata_Reference_Information:

Metadata_Date: 20020807

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: The PRISM Climate Group, Oregon State University

Contact_Person: Wayne Gibson

Contact_Position: Senior Research Assistant

Contact_Address:

Address_Type: The PRISM Climate Group, Oregon State University, 2001 Kelley Engineering Center

City: Corvallis

State_or_Province: Oregon

Postal_Code: 97331-2209

Country: USA

Contact_Voice_Telephone: (541) 737-2531

Contact_Electronic_Mail_Address: gibson@nacse.org

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.1.2.671

Data_Quality_Information:

Completeness_Report:

A modified Barnes filter (Barnes, 1964) was applied to the UGSG 15-arc-second coverage to smooth the DEM to 2.5-arc-minute resolution.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Accuracy of this data set is based on the original specification of the Defense Mapping Agency (DMA) 1 degree digital elevation models (DEM). The stated accuracy of the original DEMs are 130 m circular error with 90% probability.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 130 m with 90% probability.

Horizontal_Positional_Accuracy_Explanation: The broad DMA production objective for 1-degree DEM's.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: United States Geological Survey (USGS)

Title: 1:250,000 Digital Elevation Models

Publication_Information:

Publication_Place: USA

Publisher: United States Geological Survey (USGS)

Type_of_Source_Media: digital files

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1967

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: DEM

Source_Contribution: grid cells representing elevation above sea level

Process_Step:

Process_Description:

It is beyond the scope of this metadata to document the processes involved in generating the 2.5-min DEM from the 15-sec DEM. However, the technique is well documented in Barnes, S.L. 1964. A technique for maximizing details in numerical weather map analysis. Journal of Applied Meteorology, 3: 396-409.

Process_Step:

Process_Description: Metadata imported.

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 621

Column_Count: 1405

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0416666666

Longitude_Resolution: 0.0416666666

Geographic_Coordinate_Units: Decimal degrees

Planar:

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 0.041667

Ordinate_Resolution: 0.041667

Geodetic_Model:

Horizontal_Datum_Name: World Geodetic Spheroid 1972 (WGS 1972)

Ellipsoid_Name: WGS72

Semi-major_Axis: 6378135.0

Denominator_of_Flattening_Ratio: 298.26

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: elevation above mean sea level

Attribute:

Attribute_Label: Value

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -73

Range_Domain_Maximum: 4005

Attribute_Units_of_Measure: meters

Attribute_Measurement_Resolution: 1

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: -999

Enumerated_Domain_Value_Definition: no data available or outside of range domain

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Value

Attribute:

Attribute_Label: Count

Overview_Description:

Entity_and_Attribute_Overview:

Cell values are elevation above mean sea level in meters rounded to the nearest integer.

Distribution_Information:

Resource_Description: Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

File_Decompression_Technique: GNU zip

Transfer_Size: 874Kb

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <URL:ftp://ftp.ncdc.noaa.gov/pub/data/prism100/us_25m.dem.gz>

Metadata_Reference_Information:

Metadata_Date: 20020807

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: The PRISM Climate Group, Oregon State University

Contact_Person: Wayne Gibson

Contact_Position: Senior Research Assistant

Contact_Address:

Address_Type: The PRISM Climate Group, Oregon State University, 2001 Kelley Engineering Center

City: Corvallis

State_or_Province: Oregon

Postal_Code: 97331-2209

Country: USA

Contact_Voice_Telephone: (541) 737-2531

Contact_Electronic_Mail_Address: gibson@nacse.org

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.1.2.671

Data_Quality_Information:

Completeness_Report:

A modified Barnes filter (Barnes, 1964) was applied to the UGSG 15-arc-second coverage to smooth the DEM to 2.5-arc-minute resolution.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Accuracy of this data set is based on the original specification of the Defense Mapping Agency (DMA) 1 degree digital elevation models (DEM). The stated accuracy of the original DEMs are 130 m circular error with 90% probability.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 130 m with 90% probability.

Horizontal_Positional_Accuracy_Explanation: The broad DMA production objective for 1-degree DEM's.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: United States Geological Survey (USGS)

Title: 1:250,000 Digital Elevation Models

Publication_Information:

Publication_Place: USA

Publisher: United States Geological Survey (USGS)

Type_of_Source_Media: digital files

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1967

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: DEM

Source_Contribution: grid cells representing elevation above sea level

Process_Step:

Process_Description:

It is beyond the scope of this metadata to document the processes involved in generating the 2.5-min DEM from the 15-sec DEM. However, the technique is well documented in Barnes, S.L. 1964. A technique for maximizing details in numerical weather map analysis. Journal of Applied Meteorology, 3: 396-409.

Process_Step:

Process_Description: Metadata imported.

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 621

Column_Count: 1405

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0416666666

Longitude_Resolution: 0.0416666666

Geographic_Coordinate_Units: Decimal degrees

Planar:

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 0.041667

Ordinate_Resolution: 0.041667

Geodetic_Model:

Horizontal_Datum_Name: World Geodetic Spheroid 1972 (WGS 1972)

Ellipsoid_Name: WGS72

Semi-major_Axis: 6378135.0

Denominator_of_Flattening_Ratio: 298.26

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: elevation above mean sea level

Attribute:

Attribute_Label: Value

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -73

Range_Domain_Maximum: 4005

Attribute_Units_of_Measure: meters

Attribute_Measurement_Resolution: 1

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: -999

Enumerated_Domain_Value_Definition: no data available or outside of range domain

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Value

Attribute:

Attribute_Label: Count

Overview_Description:

Entity_and_Attribute_Overview:

Cell values are elevation above mean sea level in meters rounded to the nearest integer.

Distribution_Information:

Resource_Description: Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

File_Decompression_Technique: GNU zip

Transfer_Size: 874Kb

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <URL:ftp://ftp.ncdc.noaa.gov/pub/data/prism100/us_25m.dem.gz>

Metadata_Reference_Information:

Metadata_Date: 20020807

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Oregon State University

Contact_Person: Wayne Gibson

Contact_Position: Senior Research Assistant

Contact_Address:

Address_Type: The PRISM Climate Group, Oregon State University, 2001 Kelley Engineering Center

City: Corvallis

State_or_Province: Oregon

Postal_Code: 97331-2209

Country: USA

Contact_Voice_Telephone: (541) 737-2531

Contact_Electronic_Mail_Address: gibson@nacse.org

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.1.2.671

Data_Quality_Information:

Completeness_Report:

A modified Barnes filter (Barnes, 1964) was applied to the UGSG 15-arc-second coverage to smooth the DEM to 2.5-arc-minute resolution.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Accuracy of this data set is based on the original specification of the Defense Mapping Agency (DMA) 1 degree digital elevation models (DEM). The stated accuracy of the original DEMs are 130 m circular error with 90% probability.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 130 m with 90% probability.

Horizontal_Positional_Accuracy_Explanation: The broad DMA production objective for 1-degree DEM's.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: United States Geological Survey (USGS)

Title: 1:250,000 Digital Elevation Models

Publication_Information:

Publication_Place: USA

Publisher: United States Geological Survey (USGS)

Type_of_Source_Media: digital files

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1967

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: DEM

Source_Contribution: grid cells representing elevation above sea level

Process_Step:

Process_Description:

It is beyond the scope of this metadata to document the processes involved in generating the 2.5-min DEM from the 15-sec DEM. However, the technique is well documented in Barnes, S.L. 1964. A technique for maximizing details in numerical weather map analysis. Journal of Applied Meteorology, 3: 396-409.

Process_Step:

Process_Description: Metadata imported.

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 621

Column_Count: 1405

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0416666666

Longitude_Resolution: 0.0416666666

Geographic_Coordinate_Units: Decimal degrees

Planar:

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 0.041667

Ordinate_Resolution: 0.041667

Geodetic_Model:

Horizontal_Datum_Name: World Geodetic Spheroid 1972 (WGS 1972)

Ellipsoid_Name: WGS72

Semi-major_Axis: 6378135.0

Denominator_of_Flattening_Ratio: 298.26

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: elevation above mean sea level

Attribute:

Attribute_Label: Value

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -73

Range_Domain_Maximum: 4005

Attribute_Units_of_Measure: meters

Attribute_Measurement_Resolution: 1

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: -999

Enumerated_Domain_Value_Definition: no data available or outside of range domain

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Value

Attribute:

Attribute_Label: Count

Overview_Description:

Entity_and_Attribute_Overview:

Cell values are elevation above mean sea level in meters rounded to the nearest integer.

Distribution_Information:

Resource_Description: Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

File_Decompression_Technique: GNU zip

Transfer_Size: 874Kb

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <URL:ftp://ftp.ncdc.noaa.gov/pub/data/prism100/us_25m.dem.gz>

Metadata_Reference_Information:

Metadata_Date: 20020807

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: The PRISM Climate Group, Oregon State University

Contact_Person: Wayne Gibson

Contact_Position: Senior Research Assistant

Contact_Address:

Address_Type: The PRISM Climate Group, Oregon State University, 2001 Kelley Engineering Center

City: Corvallis

State_or_Province: Oregon

Postal_Code: 97331-2209

Country: USA

Contact_Voice_Telephone: (541) 737-2531

Contact_Electronic_Mail_Address: gibson@nacse.org

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

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