East ISA Terrain Slope - CPC Ecuador Projects

Identification_Information:

Citation:

Citation_Information:

Originator: Spatial Analysis Unit, Carolina Population Center
Publication_Date: 2000
Title: East ISA Terrain Slope
Geospatial_Data_Presentation_Form: raster digital data

Description:

Abstract:: This data set contains the terrain slope for the Eastern Intensive Study Area (ISA) of the CPC Ecuador Projects, in the northern Oriente of Ecuador. For a raster terrain data set, slope is the rate of maximum change in the elevation values from the surrounding eight pixels, through the pixel of interest. It is derived from a digital elevation model (DEM). Each pixel is attributed with a value that represents the slope, in degrees. The raster resolution of the data set is based on the resolution of the source DEM – in this case, 30 meters.
Purpose:: The slope data can be used for any analyses that require a terrain component that represents rate of change.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1993

Currentness_Reference: publication date

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -76.752607
East_Bounding_Coordinate: -76.501410
North_Bounding_Coordinate: -0.002758
South_Bounding_Coordinate: -0.337303

Keywords:

Theme:

Theme_Keyword_Thesaurus: Ecuador
Theme_Keyword: terrain
Theme_Keyword: slope

Access_Constraints:

Data is available to the public, made possible through the NASA LBA program.

Use_Constraints:

There are no use constraints. However, potential users should be aware that the resolution of this data set makes it inappropriate for any analyses where the scale of analysis is finer than 30 meters.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Brian Frizzelle
Contact_Organization: Carolina Population Center

Contact_Position: Senior Spatial Analyst

Contact_Address:

Address_Type: mailing and physical address
Address: 123 W. Franklin St., Suite 205 West
City: Chapel Hill
State_or_Province: NC
Postal_Code: 27516
Country: USA

Contact_Voice_Telephone: 919-966-6663

Contact_Facsimile_Telephone: 919-966-6638

Contact_Electronic_Mail_Address: brian_frizzelle@unc.edu

Data_Set_Credit:

The slope data was generated by Brian Frizzelle, of the Spatial Analysis Unit, Carolina Population Center.

Security_Information:

Security_Classification: Unclassified

Native_Data_Set_Environment:

Microsoft Windows NT Version 4.0 (Build 1381) Service Pack 6; ESRI ArcCatalog 8.2.0.700

Cross_Reference:

Citation_Information:

Title: East ISA Digital Elevation Model

Cross_Reference:

Citation_Information:

Title: East ISA Terrain Aspect

Cross_Reference:

Citation_Information:

Title: North ISA Terrain Slope

Cross_Reference:

Citation_Information:

Title: South ISA Terrain Slope

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:: The slope values assigned to the pixels in the data set were generated with the SLOPE algorithm in ARC/INFO, which calculates the RATE of greatest elevational change based on the eight surrounding pixels. Slope values are derived solely from the DEM data, as slope is the first derivative of elevation. An accuracy assessment of the slope values has not been performed.

Completeness_Report: Data are complete for the ISA.

Lineage:

Process_Step:

Process_Description:: The East ISA Digital Elevation Model was used to generate the slope surface. The SLOPE command in ARC/INFO was used. For each pixel, SLOPE takes the values of the eight surrounding pixels, fits a plane to the 3×3 pixel array, and calculates the rate of maximum elevational change along the slope. That rate value is assigned to the central pixel.
Process_Date: 2000

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell
Row_Count: 1233
Column_Count: 932
Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: -18

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 10000000.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 30.000000
Ordinate_Resolution: 30.000000

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:: The pixels are attributed with the slope rate of change in degrees. The range of slope values is 0 to 90, where 0 indicates perfectly flat terrain, and 90 indicates a vertical wall.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Brian Frizzelle
Contact_Organization: Carolina Population Center

Contact_Position: Senior Spatial Analyst

Contact_Address:

Address_Type: mailing and physical address
Address: 123 W. Franklin St., Suite 205 West
City: Chapel Hill
State_or_Province: NC
Postal_Code: 27516
Country: USA

Contact_Voice_Telephone: 919-966-6663

Contact_Facsimile_Telephone: 919-966-6638

Contact_Electronic_Mail_Address: brian_frizzelle@unc.edu

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: 4.525

Ordering_Instructions: Contact Brian Frizzelle to obtain a copy of the data set.

Custom_Order_Process: Contact Brian Frizzelle to obtain a copy of the data set.

Technical_Prerequisites: Must have a software package that can read ARC/INFO grids.

Metadata_Reference_Information:

Metadata_Date: 20021004

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Brian Frizzelle
Contact_Organization: Carolina Population Center

Contact_Position: Senior Spatial Analyst

Contact_Address:

Address_Type: mailing and physical address
Address: 123 W. Franklin St., Suite 205 West
City: Chapel Hill
State_or_Province: NC
Postal_Code: 27516
Country: USA

Contact_Voice_Telephone: 919-966-6663

Contact_Facsimile_Telephone: 919-966-6638

Contact_Electronic_Mail_Address: brian_frizzelle@unc.edu

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