CO_Rdls2001_Dissolved_May09
Metadata also available as
Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator:
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Original, National Forest IRA dataset from US Forest Service, Geospatial Service & Technology Center (GSTC); Subset (Colorado IRAs) of national coverage was exported from original dataset by USFS Rocky Mountain Region (R2), Geospatial Services
- Publication_Date:
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20000915, Updated 20030107, Updated 20030627, Subsetted (Colorado IRAs only) 2007
- Title: CO_Rdls2001_Dissolved_May09
- Geospatial_Data_Presentation_Form: vector digital data
- Online_Linkage:
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\\PCHP90202Q3\C\projects\test_ira\CO_Rdls2001_Dissolved_May09.shp
- Description:
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- Abstract:
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This dataset (shapefile) contains all National Forest Inventoried Roadless Areas (IRAs) for
the State of Colorado. Thie Colorado IRA (shapefile) dataset is a subset from the original
National Forest IRA dataset ((coverage) compiled by GSTC. In the Colorado IRA dataset
(shapefile), the special designated areas & wilderness areas were also removed so all that
remains in the shapefile are the inventoried roadless areas (IRAs).
The IRA data was originally submitted to GSTC by all national forests through
their Regional Offices for the Forest Service's Roadless Area Conservation
Initiative.
The data was consolidated at the GSTC and used in the Draft Environment Impact
Statement. Between the draft and final stages of the Environmental Impact
Statement, the data was updated by the forests to reflect any corrections to
Inventoried Roadless Areas that were based on existing forest plans and
administrative record. The data was also supplemented to include Special
Designated Area information and to include Inventoried Roadless Areas within
Special Designated Areas. The data was resubmitted to the GSTC on July 21, 2000
for consolidation and the completed coverage was used in the Roadless Area
Conservation Final Environmental Impact Statement. On October 15, 2002, the
Gallatin National Forest submitted a technical correction to the Inventoried
Roadless Area GIS database. A portion of the original GIS data was corrected to
match the 1999 IRA maps that are part of the forest administrative record.
IRAs are based on completed forest plans, forest plans in revision where the
agency has established an inventory (this information should be available in
Appendix C of most forest plans), or other assessments that are completed and
adopted by the agency. RARE II information was used in cases where a forest
does not have a more current roadless inventory, which was established using
RARE II information.
- Purpose:
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The purpose of this spatial data set is to show where the Inventoried Roadless
Areas are located. The EIS analysis team used this spatial data to assess the
impacts of roadless area alternatives on Forest Service policies, use of the
National Forests and the surrounding environment. It was used for analysis in
combination with national characterization layers, such as ambient human
population, forest mortality risk to insects and diseases, current land cover
types, and others. All of these datasets include the entire lower 48 states,
and are coarse resolution. The public also had a need to know where IRAs were
located in their area and across the nation. The data was used to create a set
of detailed maps published both on the web and in hardcopy form, (Volume2,
Roadless Area Conservation EIS).
- Supplemental_Information:
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All of the following editing processes were performed using ARC/INFO software.
The IRA data (for the National dataset) was originally submitted to GSTC on
December 3, 1999 for the Draft Environmental Impact Statement.
The data was submitted in ARC/INFO export
format (.e00), in most cases as individual national forest coverages, but in
some cases together with other national forests. The original datasets
submitted were derived from a variety of original source manuscripts, most IRA
data had a scale of 1:24,000. Some datasets were of smaller scale, typically
1:126,720. Each national forest was originally compiled at a different time,
from different source material, using various methods. Region 5 submitted one
file, which included all national forests in that region (primarily the state of
California). In these instances, individual coverages were extracted by
national forest administrative unit, and edited separately. All data was
imported, projected to Albers and audited to check for INFO item consistency.
Unnecessary features were removed and label errors removed.
Each national forest dataset was spatially edgematched to a national forest
boundary dataset compiled at GSTC for this purpose, and attribute information
was added or corrected. It was GSTC's intent to change the original data as
little as possible, altering the geometry only as necessary to fit the National
Forest Boundary coverage, and editing attributes only for consistency or where
apparent errors occurred.
Edgematched data to National Forest Boundary coverage by -
1) intersected the IRA and the NF boundary coverages using the UNION command
with a fuzzy tolerance of 1.5 map units (meters)
2) deleted polygons that extended beyond NF boundary as long as they
appeared to be sliver polygons created by union
3) deleted/absorbed polygons that did not extend to NF boundary by
eliminating all interior polygons less than 5 acres in size that had no IRA
category value or NF ownership status using ELIMINATE command
4) merged remaining polygon undershoots using the MERGE command via manual
editing
5) conducted final quality assessment to check all work - this consisted of
running acreage calculations for polygons before and after the edgematching
process; all differences of 100 acres or greater were checked on screen and
corrected if necessary; acreage calculations were run again after corrections
were made to ensure there were no major changes (in some cases, changes were
necessary after verifying with forest personnel that an error in the original
data existed); a query was run on all coverages which resulted in a report
showing frequency of polygons that had no ownership item and no IRA category -
these were checked visually using hard copy maps and phone calls to forests, if
necessary, to verify what the polygons in question were; all IRA coverages were
also checked visually on the screen to make sure there were no additional
errors.
Regional coverages were created by first appending the completed individual
national forest IRA coverages into administrative regional coverages, using the
APPEND command with the polygon option. This resulted in seven regional
coverages for Regions: 1 (Northern), 2 (Rocky Mountain), 3 (Southwestern), 4
(Intermountain), 5 (Pacific Southwest), 6 (Pacific Northwest), 8 (Southern), and
9 (Eastern). These seven regional coverages were then appended into the
national coverage, again, using the APPEND command.
The resulting national coverage was automatically edited, using the CLEAN
command, with a fuzzy tolerance of 1.5 meters. This removed geometric errors,
and rebuilt topology. The coverage was then reprojected from Albers to decimal
degrees for consistency with all other coverages used for analysis work.
Between the draft and final stages of the Environmental Impact Statement, the
data was updated by the forests to reflect any corrections to Inventoried
Roadless Areas that were based on their existing forest plan. The data was also
updated to include Special Designated Area information and to include
Inventoried Roadless Areas within Special Designated Areas. After these updates
were made the data was resubmitted to the GSTC on July 21, 2000 for
consolidation.
The final consolidation of the national IRA coverage was accomplished at the
GSTC with the benefit of having one representative from each region to assist
with quality control. All the completed regions were appended together into the
national coverage and reprojected from Albers to decimal degrees for analysis
and display in the Roadless Area Conservation Environmental Impact Statement.
The IRAs only were selected from national coverage to make this dataset.
On January 7, 2003, a technical correction to the IRA GIS data was performed by
GSTC on behalf of the Gallatin National Forest. The technical correction
complies with direction described in the Roadless Area Conservation Rule 294.11
and Interim Directive 1920-2001-1 section 1925.05.
On June 27, 2003, a technical correction to the IRA GIS data was performed by
GSTC on behalf of the Santa Fe National Forest. A portion of the original GIS
data was corrected to match the IRA maps that are part of the forest
administrative record. The technical correction complies with direction
described in the Roadless Area Conservation Rule 294.11 and Interim Directive
1920-2001-1 section 1925.05. The correction removes roadless attributes from all
polygons that comprise the Jemez NRA and East Jemez NWSR so that these two
special designated areas are no longer shown as inventoried roadless areas.
These areas were incorrectly shown as inventoried roadless areas.
On August 2, 2004, a technical correction to the Blue Mountain Roadless Area was
performed by GSTC on behalf of the Manti-La Sal National Forest to more
accurately reflect the 1983 Roadless Area Reevaluation as shown in the 1986
Planning Record. The Blue Mountain IRA boundaries were re-digitized at higher
resolution with the aid of topography and classified roads to match the boundary
as intended in the "Roadless Area Briefing Guide for Forest Planning for the
Manti-La Sal National Forest." The technical correction complies with direction
described in the Roadless Area Conservation Rule 294.11 and Interim Directive
1920-2001-1 section 1925.05.
On August 2, 2004, a technical correction along the border of the Salmon-Challis
and Sawtooth National Forests was performed by GSTC. This correction fixes a
data consolidation error that went undetected during the construction of the IRA
GIS dataset. A 37,000 acre section of the Sawtooth National Recreation Area was
mistakenly combined with the Squaw Creek IRA. The technical correction restores
these two features back to their original state. The technical correction
complies with direction described in the Roadless Area Conservation Rule 294.11
and Interim Directive 1920-2001-1 section 1925.05.
In 2007 Region 2 (Rocky Mountain Region), Geospatial Services downloaded the GSTC
National IRA coverage from the official roadless website. The IRAs, special designated areas,
& wildernesses that are within the State of Colorado were selected & exported to a new dataset
(shapefile). The new shapefile was edited (special designated areas & wildernesses were removed)
so that only the Inventoried Roadless Areas (IRAs) remained in the shapefile. The shapefile was
projected to NAD83, UTM, zone 13, north. The polygons were dissolved based on like inventoried roadless names & roadless categories (2009).
- Time_Period_of_Content:
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- Time_Period_Information:
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- Range_of_Dates/Times:
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- Beginning_Date: 19991203
- Ending_Date:
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20000915, Edited 20030107, Colorado IRAs dataset subset from National IRA dataset in 2007
- Currentness_Reference: publication date
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: Unknown
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -109.207852
- East_Bounding_Coordinate: -104.881753
- North_Bounding_Coordinate: 41.021029
- South_Bounding_Coordinate: 36.971965
- Keywords:
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- Theme:
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- Theme_Keyword: Inventoried Roadless Areas (IRAs)
- Place:
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- Place_Keyword: Colorado
- Place_Keyword: National Forests
- Access_Constraints:
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User needs to exercise caution regarding the spatial accuracy of these data.
The source scales can vary. External features cannot be expected to align. The
National Forest Planning Record Documents (Appendix C), other assessments
adopted by the US Forest Service, or RARE II documents, are ultimately the
official version of inventoried roadless areas.
- Use_Constraints:
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Data may be viewed and used by any and all entities upon request. However, data
should not be changed or modified by anyone other than the USFS. The US Forest
Service does not guarantee the accuracy of this data.
- Point_of_Contact:
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- Contact_Information:
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- Contact_Organization_Primary:
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- Contact_Organization:
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US Forest Service, Rocky Mountain Region (Region 2), Geospatial Services
- Contact_Address:
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- Address_Type: physical address
- Address: 740 Simms Street
- City: Golden
- State_or_Province: CO
- Postal_Code: 80401
- Native_Data_Set_Environment:
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Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3500
- Data_Quality_Information:
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- Lineage:
- Spatial_Data_Organization_Information:
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- Direct_Spatial_Reference_Method: Vector
- Point_and_Vector_Object_Information:
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- SDTS_Terms_Description:
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- SDTS_Point_and_Vector_Object_Type: G-polygon
- Point_and_Vector_Object_Count: 412
- Spatial_Reference_Information:
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- Horizontal_Coordinate_System_Definition:
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- Planar:
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- Grid_Coordinate_System:
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- Grid_Coordinate_System_Name: Universal Transverse Mercator
- Universal_Transverse_Mercator:
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- UTM_Zone_Number: 13
- Transverse_Mercator:
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- Scale_Factor_at_Central_Meridian: 0.999600
- Longitude_of_Central_Meridian: -105.000000
- Latitude_of_Projection_Origin: 0.000000
- False_Easting: 500000.000000
- False_Northing: 0.000000
- Planar_Coordinate_Information:
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- Planar_Coordinate_Encoding_Method: coordinate pair
- Coordinate_Representation:
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- Abscissa_Resolution: 0.000000
- Ordinate_Resolution: 0.000000
- Planar_Distance_Units: meters
- Geodetic_Model:
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- 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
- Vertical_Coordinate_System_Definition:
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- Altitude_System_Definition:
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- Altitude_Resolution: 0.000100
- Altitude_Encoding_Method:
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Explicit elevation coordinate included with horizontal coordinates
- Entity_and_Attribute_Information:
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- Detailed_Description:
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- Entity_Type:
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- Entity_Type_Label: CO_Rdls2001_Dissolved_May09
- Attribute:
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- Attribute_Label: FID
- Attribute_Definition: Internal feature number.
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
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- Unrepresentable_Domain:
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Sequential unique whole numbers that are automatically generated.
- Attribute:
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- Attribute_Label: Shape
- Attribute_Definition: Feature geometry.
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
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- Unrepresentable_Domain: Coordinates defining the features.
- Attribute:
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- Attribute_Label: REGION
- Attribute_Definition:
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Forest Service Region Identifier (Region 2 = Rocky Mountain Region)
- Attribute:
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- Attribute_Label: FOREST
- Attribute_Definition: Forest Name where Inventoried Roadless Area (IRA) resides
- Attribute:
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- Attribute_Label: STATE
- Attribute_Definition: State Name Abbreviation
- Attribute:
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- Attribute_Label: NAME
- Attribute_Definition: Name of the Inventoried Roadless Area (IRA)
- Attribute:
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- Attribute_Label: CATEGORY
- Attribute_Definition: Inventoried Roadless Area Categories
- Attribute_Domain_Values:
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- Enumerated_Domain:
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- Enumerated_Domain_Value:
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1B = Inventoried Roadless Areas where road construction and reconstruction is
- Enumerated_Domain:
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- Enumerated_Domain_Value:
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1B-1 = Inventoried Roadless Areas that are recommended for wilderness
- Enumerated_Domain:
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- Enumerated_Domain_Value:
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1C = Inventoried Roadless Areas where road construction and reconstruction is
- Attribute:
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- Attribute_Label: Acres_vb
- Attribute_Definition: Acres of specific inventoried roadless area (IRA)
- Distribution_Information:
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- Resource_Description: Downloadable Data
- Distribution_Liability:
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The US Forest Service manages resource information and derived data as a
service to US Forest Service users of digital geographic data. The US
Forest Service is in no way condoning or endorsing the application of these data
for any given purpose. It is the sole responsibility of the user to determine
whether or not the data are suitable for the intended purpose. It is also the
obligation of the user to apply those data in an appropriate and conscientious
manner. The US Forest Service provides no warranty, nor accepts any liability
occurring from any incorrect, incomplete, or misleading data, or from any
incorrect, incomplete, or misleading use of these data.
Much of the US Forest Service data are compiled, processed, and maintained
with ARC/INFO software developed by the Environmental Systems Research Institute
(ESRI). Much of the information presented uses conventions and terms
popularized by ARC/INFO and its user community. The mention of commercial firms
or products is for clarity and identification of procedures and methods only,
and no endorsements are implied by the USDA Forest Service.
- Standard_Order_Process:
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- Digital_Form:
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- Digital_Transfer_Information:
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- Transfer_Size: 9.297
- Metadata_Reference_Information:
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- Metadata_Date: 20100405
- Metadata_Contact:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization:
-
US Forest Service, Rocky Mountain Region (Region 2), Geospatial Services
- Contact_Address:
-
- Address_Type: physical address
- Address: 740 Simms Street
- City: Golden
- State_or_Province: CO
- Postal_Code: 80401
- Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
- Metadata_Standard_Version: FGDC-STD-001-1998
- Metadata_Time_Convention: local time
- Metadata_Extensions:
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- Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
- Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.6 on Mon Apr 05 07:53:51 2010
https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5145314.htm