| Field Sampled Vegetation | |
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Data format: Personal GeoDatabase Feature Class File or table name: FSVeg Coordinate system: Albers Conical Equal Area Theme keywords: Stand exams, Vegetation, Sampled |
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Abstract:
Current and historic stand exams on the Malheur National Forest |
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Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
Current and historic stand exams on the Malheur National Forest
Delineation of stand exams for display and analysis
In 2001 the forest contracted with Duck Creek Associates to photo interpret various vegetation characteristics from 2001 aerial photography. The contractor began with a polygon coverage we provided and the contractor could and did modify as the situation demanded. This then provided us with wall-to-wall map coverage of existing vegetation on the Malheur. This map is called EVG (existing vegetation) and the data was loaded into two tables of the NRIS (National Resource Information System) FSVEG (Field Sampled Vegetation) module designed to hold legacy or remotely sensed data. During the same time frame the forest gathered all the stand exams we could find that were in electronic format and could be located on a map. The data was loaded into FSVEG using a legacy data loader. Since 2001 we have been using the new Common Stand Exam Program. We did not care whether the data was still useable, because no mater when it was taken it is a snapshot of what the conditions were at that location at that point in time and therefore can be used to reconstruct stands what they were like before a disturbance. The data in FSVEG relates to a coverage called FSVEG. This coverage is regioned, which allows for the overlapping of polygon boundaries unlike the EVG, which does not. Using a regioned coverage allows you to relate every exam in the FSVEG database essentially forever on demand.
ground condition
None
P.O. Box 909
some recent exams GPS'ed
Dataset created
removed 9 polys with no gis_link, all on Emigrant Creek
Took out existing Emigrant Creek data, then put in Dan Bennett's new fsveg cover, which included old data, as well as new 2002 stand exam.
fixed duplicate regions in Blue Mtn district
P.O. Box 909
Deleted 2 duplicate stand exam polys
replaced with most up-to-date stand exams
replaced with most up-to-date stand exams
replaced with most up-to-date stand exams from Emigrant Creek
Dataset updated
Dataset updated (added 34 polygons)
Dataset updated
Dataset updated
Dataset updated (in Prairie City and Blue Mountain)
Dataset updated
Dataset updated
copied to double precision
P.O. Box 909
Reprojected to Region 6 Albers NAD83 projection
the current coverage did not have the 2005 exam contract. Also makes sure every polygon has a link to data in FSVEG which resulted in a half a dozen polygons being deleted because they were never examined or we could not find the data.
Added contract stand exams from 2006
Added new updates from 10/25/06
Added updates from Ed Uebler
Updates from Ed Uebler
Changed the tolerances on all coverages to the malheur/bmprov default tolerances (most coverages didn't have them set:) fuzzy - .000123 dangle - 0 edit - 10.0 nodesnap - 2.0 weed - .02 grain - .02 snap - 2.0 Ran the aml &r comloop * cover &r tol ^
Updates from Ed Uebler. Adds polygons that were examined this year, or will be by mid-November.
Updates in Egley fire area.
Converted from coverage
Converted from coverage
Converted from coverage
Feature geometry.
ESRI
Internal feature number.
ESRI
Length of feature in internal units.
ESRI
Area of feature in internal units squared.
ESRI
Setting ID - This is a character field 26 characters wide. This field will be the link with the exam in the FSVEG database to a field with the same name and data type and size. FSVEG uses a term called setting_id to identify an exam. This setting identification is defined as any area (stand, location, site) that is considered an aggregation of individual items (shrubs, plants, trees) being measured. Can be polygon or point in nature. For our purposes we are examining polygons or stands of trees. FSVEG can also measure non-forest polygons. The setting_id field is in the table NRV_SETTING_MEASUREMENTS of FSVEG.
J:/fsfiles/ref/library/gis/mal/Malheur_Polygon_Numbering_System_InFSVEG.doc
P.O. Box 909
P.O. Box 909