EvegTile21C_05_24k_v1

Abstract:

This existing vegetation tile is a recently completed 2005 Classification and Assessment with LANDSAT of Visible Ecological Groupings (CALVEG) map product at a scale of 1:24,000, which updates and revises the 2000, 1:100,000 scale for the National Forest administrative areas, including private land inholdings. The primary input for image segmentation for this tile is 5-meter imagery. Land outside of the update area largely remains at a 1:100,000 scale.

The map extent is predominately within CALVEG Zones 3 (North Sierra) and 4 (South Sierra). The CALVEG classification system was used for vegetation typing and crosswalked to other classification systems in this database. Mapping standards meet requirements of the USDA Forest Service as defined by the FS GIS data dictionary, FGDC Vegetation standards and the FS Existing Vegetation Classification and Mapping Technical Guide. Regional add-ons are retained for crosswalking to the California Wildlife Habitat Relationship System. 

For more information refer to the GIS layer description, Existing Vegetation Mid Level Map by the USDA Forest Service, Pacific Southwest Region, at http://www.fs.fed.us/r5/rsl/projects/frdb/layers/ev_mid.html. 

NAMING CONVENTION 
For example - EvegTile06A_03_04_24k_v2: 
<06A>_03_04_24k_v2 - Tile number (see tile index called Calveg Tiles_Ecoregions at http://www.fs.fed.us/r5/rsl/clearinghouse/gis-download.shtml) 
06A_<03_04> - source year(s) of data i.e. 2002, 2003
06A_03_04_<24k> - map scale standard i.e. 1:24,000 (or <100k> for 1:100,000)
06A_04_24k_<v2>- version number

Purpose:

Used for National Forest planning and assessment and other natural resource applications

Supplemental_Information:

Procedures_Used

PROJECT DATE: 12/2007 - 12/2008

PROJECT DESCRIPTION: This update is for portions of CALVEG Zones 3 and 4 for all ownerships within the Lake Tahoe Basin Management Unit, the Eldorado National Forest, and the Stanislaus National Forest administrative boundaries. The project completes the 5 year update of the 2000 vegetation maps. 
 
New polygon features were developed from 2005 30-meter TM image sources that were pan-sharpened with 5-meter 2005 Spot imagery. Disturbed areas were identified from 2000-2005 change detection data, 1995-2005 fire perimeters, and 1985-2005 harvest and reforestation activity information on the National Forests. Updates were completed for both decreasing and increasing vegetation change areas for life-form, floristic type, and tree size class. Tree canopy cover was re-mapped for all forested lands within the project area. Additional map improvement work was targeted based on accuracy assessments and field validation.  Managed plantations boundaries, as well as lake and other waterbody polygons from 1:24,000 scale GIS sources were integrated at the image segmentation phase of the project. Updates were developed via the integration of local potential natural vegetation map products, image classification, terrain-based modeling and field/photo review. 
 
Vegetation data for this tile was assembled, integrated and/or generated by the Region 5 Remote Sensing Laboratory, McClellan, CA (http://www.fs.fed.us/r5/rsl). For more information visit the following R5 Remote Sensing Laboratory web pages: 
Vegetation Mapping: http://www.fs.fed.us/r5/rsl/projects/mapping/ 
Vegetation Classification: http://www.fs.fed.us/r5/rsl/projects/classification/ 

DATA SOURCES: 
 
IMAGERY: 
2005 Landsat TM Path/Row: 
43/32 7/8/05
43/34 7/8/05
42/32 10/12/05
42/34 12/12/05
2005 Spot 5 Panchromatic 9/16/05

 
ANCILLARY DATA: 
Lakes layer from National Hydrography Dataset (NHD)
2005 1:15:840 Color Resource Photography 
IKONOS Imagery 1m 7/15/2002 
Lake Tahoe Basin TMDL Land Use Layer

Currentness_Reference:

publication date

Entity_and_Attribute_Detail_Citation:

For a description of this dataset and a listing of valid values, go to the Remote Sensing Lab Forest Resource Database Dictionary (FRDB) at http://www.fs.fed.us/r5/rsl/projects/frdb/layers/ev_mid.html