Pennsylvania Spatial Data Access

Abstract:

This dataset displays contour lines covering the Allegheny National Forest (ANF) and surrounding area at 20 foot intervals.  Each contour is a line of equal elevation, therefore, contours never cross.  They show the general shape of the terrain.  Contours that are very close together represent steep slopes.  Widely spaced contours or an absence of contours means that the ground slope is relatively level.

Purpose:

The purpose of this data is to support project-level planning, decision making, implementation and monitoring for Forest Service managers, GIS Specialists and others.

Currentness_Reference:

publication date

Use_Constraints:

None

Address:

4 Farm Colony Drive

 
Office is closed on federal holidays.

Attribute_Accuracy_Report:

The arc command LATTICECONTOUR was used on USGS DEM (Digital Elevation Model) data to produce the contour_20 (originally topo_20) coverage.  Using this command produced engineering-quality contours, representing an exact interpretation of the lattice surface model.  A weed tolerance of 2 was used with the latticecontour command.  Contour lines display at 20 foot intervals starting at 1000 feet.  Contour values are listed in the attribute table column "contour".

Logical_Consistency_Report:

This dataset was checked for topological consistency using the Arc/INFO command build.

Horizontal_Positional_Accuracy_Report:

Dataset meets National Mapping Accuracy Standards (NMAS) for 1:24000 scale mapping.

Attribute_Definition:

Internal feature number.

Attribute_Definition_Source:

ESRI

Attribute_Definition:

Feature geometry.

Attribute_Definition_Source:

ESRI

Attribute_Definition:

Contour elevation

Address:

4 Farm Colony Drive

 Office closed on Federal Holidays.

Distribution_Liability:

The Forest Service uses the most current and complete data available.  GIS data and product accuracy may vary.  They may be developed from sources of differing accuracy; accurate only at certain scales; based on modeling or interpretation; incomplete while being created or revised; etc.  Using GIS products for purposes other than those for which they were created, may yield inaccurate or misleading results.  The Forest Service reserves the right to correct, update, modify, or replace this geospatial information without notification.  For more information, contact USDA Forest Service, Allegheny National Forest (814)723-5150.

Address:

115 Land and Water Building

Distribution_Liability:

The USER shall indemnify, save harmless, and, if requested, defend those parties involved with the development and distribution of this data, their officers, agents, and employees from and against any suits, claims, or actions for injury, death, or property damage arising out of the use of or any defect in the FILES or any accompanying documentation. Those parties involved with the development and distribution excluded any and all implied warranties, including warranties or merchantability and fitness for a particular purpose and makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance. Those parties involved with the development and distribution of this data will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.

Address:

4 Farm Colony Drive

Office is closed on Federal holidays.

Contour_20