Description: Current Grazing allotments and pastures (sub-allotments)
BLM Layers: Grazing Allotment = GRA_ALLOTMENT_POLY, Pasture = GRA_POLY, Allotment Lines = GRA_ARC
Layers do not display at scales greater than 1:1,000,000. Labels begin to appear at 1:500,000 (allotments) and 1:150,000 (pastures).
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This dataset contains livestock grazing allotment and pasture boundaries with associated attributes describing some basic characteristics of the allotments and pastures. Allotments are made up of pastures. The dataset contains pasture boundary polygons, GRA_POLY, and its coincident line pair, GRA_ARC, which contains boundary definition information. The BLM allotments are tied to the 1934 Taylor Grazing Act which set up grazing districts. All BLM lands should have grazing management identified. However, some districts have considerably more rangeland and larger blocks of BLM parcels and some districts have only scattered parcels and a small or nonexistent grazing program. The ALTPAST attribute, the main attribute for GRA_POLY, accommodates these differences. This theme is associated with the Rangeland Administration System (RAS), a national database application for allotment billing. The relationship of grazing allotments and pastures to fence lines can be confusing. The themes are not identical, but there will be a great deal of coincidence. Pastures (GRA_POLY) are areas (polygons) that keep animals in. Usually, fences (lines) are the physical spatial features that comprise these pasture boundaries, but there may be others like steep terrain or water features. These are defined by attribute DEF_FEATURE of GRA_ARC (line pair to GRA_POLY). Fence lines exist as a separate spatial feature class not described in this standard. While not necessarily identical to the lines in GRA_ARC, there will be a great deal of coincidence and the themes should be maintained together. This dataset also contains proposed pasture polygons, GRA_P_POLY. During planning activities such as Allotment Management Plan (AMP) or Resource Management Plan (RMP) development, it may be necessary to create and analyze different proposals for allotment and pasture changes. The theme will be highly variable and should be archived with other project/plan specific data at the appropriate decision date. Approved pasture changes are incorporated into GRA_POLY and GRA_ARC.
USAGE
This dataset is used for depicting grazing allotments and pastures on maps. Pasture boundaries are dissolved to form allotment boundaries (see Layer Files section). The grazing allotment and pasture dataset is one of the most important datasets to BLM business, and it is also used in most National Environmental Policy Act planning, and other resource analysis. This is a dataset that would be used by most resource specialists, especially those involved in administration of livestock grazing programs. The GRAZSYS attribute can be used to select areas available or not available for livestock grazing.
Description: GRA_ARC: Linework describing livestock grazing allotment and pasture boundaries on BLM lands in Oregon and Washington. For a complete description of this data contact the BLM Oregon Data Steward for a copy of "Grazing Allotments and Pastures Data Standard"
Copyright Text: Bureau of Land Management (BLM), Oregon State Office
Value: GRAZING_BOUNDARY Label: GRAZING_BOUNDARY - Pasture or other administrative grazing boundary that is not fenced and does not follow a subdivision or some other legal boundary. Description: N/A Symbol:
Value: MINERAL_DISTURBANCE Label: MINERAL_DISTURBANCE - Edge of quarry, mine, gravel stockpile or other mineral surface disturbance area Description: N/A Symbol:
Value: NLCS_BOUNDARY Label: NLCS_BOUNDARY - Wilderness, Wild and Scenic River, Historic District or other NLCS designation boundary. Description: N/A Symbol:
DEF_FEATURE
(
type: esriFieldTypeString, alias: DEF_FEATURE, length: 25
, Coded Values:
[ADMIN_REC_SITE: ADMIN_REC_SITE - Administrative or Recreation facility or site boundary]
, [BLM_ADMIN: BLM_ADMIN - Bureau of Land Management administrative boundary]
, [CLOSURE: CLOSURE - Closure extension. Used to close small gaps.]
, ...36 more...
)
COORD_SRC
(
type: esriFieldTypeString, alias: COORD_SRC, length: 7
, Coded Values:
[CADNSDI: CADNSDI - Coordinates from or snapped to the CADNSDI dataset]
, [CFF: CFF - Lines duplicated or buffered from Cartographic Feature Files (USFS)]
, [DEM: DEM - Digital Elevation Model (30 m or better accuracy) used for creation of contours]
, ...18 more...
)
Description: GRA_POLY: Livestock grazing allotment and pasture boundaries with associated attributes describing some basic characteristics of the allotments and pastures on BLM lands in Oregon and Washington. Each allotment has one or more pastures. This data is designed in accordance with the OR BLM "Grazing Allotments and Pastures Data Standard."
Copyright Text: Bureau of Land Management (BLM), Oregon State Office
Color: [115, 38, 0, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: left Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 8 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
GRAZSYS
(
type: esriFieldTypeString, alias: GrazSys, length: 2
, Coded Values:
[00: 00 - Out. Area with no BLM land or otherwise not part of the allotment system. Includes areas with fenced-in slivers of BLM land that may be grazed but area not under BLM grazing management control.]
, [99: 99 - Mostly private area with small slivers of BLM land (not currently managed).]
, [CU: CU - Custodial. Areas where the grazing system is not defined and resource values are protected, such as fenced federal range (FFR).]
, ...22 more...
)
MGMTCAT
(
type: esriFieldTypeString, alias: MgmtCat, length: 1
, Coded Values:
[I: I - Improve current unsatisfactory resource(s) condition.]
, [M: M - Maintain current satisfactory resource(s) condition.]
, [N: N - Not Applicable]
, ...1 more...
)
Description: GRA_ALLOTMENT_POLY: Livestock grazing allotments and associated attributes describing some basic characteristics of the allotments for allotments on BLM lands in Oregon and Washington.
Copyright Text: Bureau of Land Management (BLM), Oregon State Office