20250103
09274500
1.0
FALSE
002
STRM_LOC_PT_web
Geographic
GCS_North_American_1983
Angular Unit: Degree (0.017453)
<GeographicCoordinateSystem xsi:type='typens:GeographicCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.5.0'><WKT>GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG",4269]]</WKT><XOrigin>-400</XOrigin><YOrigin>-400</YOrigin><XYScale>999999999.99999988</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>8.98315284119521e-09</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><LeftLongitude>-180</LeftLongitude><WKID>4269</WKID><LatestWKID>4269</LatestWKID></GeographicCoordinateSystem>
150000000
5000
20260422
10023100
20260422
10023100
dataset
external
5a5e623f2f1754e1ac1730244bffa682caeb0e82
Scott Kiefer
Bureau of Land Management (BLM), Oregon State Office
GS0301 - Geographic Information System Specialist
P.O. Box 2965
Portland
OR
97208
US
skiefer@blm.gov
Name: Scott Kiefer
Organization: Bureau of Land Management (BLM), Oregon State Office
Position: GIS Specialist
Role: Unknown
Name: Scott Kiefer
Organization: Bureau of Land Management (BLM), Oregon State Office
Position: GIS Specialist
Role: Unknown
True
Name: Scott Kiefer
Organization: Bureau of Land Management (BLM), Oregon State Office
Position: GS0301 - Geographic Information System Specialist
Role: Unknown
20260422
ArcGIS Metadata
1.0
Eric Hiebenthal
Bureau of Land Management
GIS Data Management Specialist
503-808-6340
503-808-6419
P.O Box 2965
Portland
OR
97208
US
ehiebent@blm.gov
contact instructions
Contact distributor.
Data are only available through the Oregon/Washington State office of the Bureau of Land Management.
Arc GIS
Feature Class
Winzip
Winzip
Arc GIS, Winzip
https://gbp-blm-egis.hub.arcgis.com/pages/oregon
File Geodatabase Feature Class
BLM-STATE
Oregon
Washington
BLM-THEME
Geospatial
Hydrology
NONE
Monitoring
Monitoring Points
Sample Points
Samples
Stream Location
U.S. Department of the Interior, Bureau of Land Management (BLM)
BLM OR Stream Location Sample Point
2026-04-22
Bureau of Land Management
Portland, Oregon
vector digital data
STRM_LOC_PT: The Stream Location Points dataset represents field collected spatial locations and basic information about the physical characteristics of a stream network, including inception points (stream origins), periodicity and continuity transitions, stream confluences, and complex stream courses.
This dataset records field collected data points regarding the physical characteristics of a stream network. In turn, these data points help inform a more accurate spatial depiction of the linear stream location, which are updated in the USGS National Hydrography Dataset (NHD). These data points also inform the attribute transitions for periodicity and continuity, which are in turn depicted on the linear features in the NHD data and the Hydrography Events datasets respectively.
Bureau of Land Management (BLM), Oregon State Office
Gerald Stevens
Bureau of Land Management
GS0301 - GIS Specialist (HYDR-APPS)
(503) 808-6480
2965 P.O. Box
Portland
OR
97208
US
gstevens@blm.gov
Geospatial
Hydrology
inlandWaters
Monitoring
Monitoring Points
Oregon
Sample Points
Samples
Stream Location
Washington
The BLM assumes no responsibility for errors or omissions. No warranty is made by the BLM as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data; nor shall the act of distribution to contractors, partners, or beyond, constitute any such warranty for individual or aggregate data use with other data. Although these data have been processed successfully on computers of BLM, no warranty, expressed or implied, is made by BLM regarding the use of these data on any other system, or for general or scientific purposes, nor does the fact of distribution constitute or imply any such warranty. In no event shall the BLM have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of the use or reliance on the geographic data or arising out of the delivery, installation, operation, or support by BLM.
Generally releasable. However, the data must be reviewed prior to release to assure that no protected data is contained within the dataset.
These data are provided by Bureau of Land Management (BLM) 'as is' and might contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. The information contained in these data is dynamic and may change over time. The data are not better than the sources from which they were derived, and both scale and accuracy may vary across the data set. These data might not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. These data are neither legal documents nor land surveys, and must not be used as such. Official records may be referenced at most BLM offices. Please report any errors in the data to the BLM office from which it was obtained. The BLM should be cited as the data source in any products derived from these data. Any Users wishing to modify the data should describe the types of modifications they have performed. The User should not misrepresent the data, nor imply that changes made were approved or endorsed by BLM. This data may be updated by the BLM without notification. DATA STEWARD APPROVAL: Mike Brown, state data steward for STRM_LOC_PT, approved the use of this dataset on October 28, 2020.
ESRI Arc Catalog 10.4
-125
-116
41.5
49.5
publication date
2026-04-22
BLM (Bureau of Land Management) A published revision of the Department Manual’s Part 305: Departmental Science Effects, Chapter 3: Integrity of Scientific and Scholarly Activities (305 DM 3), effective December 16, 2014, is available online at http://elips.doi.gov/ELIPS/DocView.aspx?id=4056. Scholarly information considered in Departmental decision making must be robust, of the highest quality, and the result of as rigorous scientific and scholarly processes as can be achieved. Most importantly, it must be trustworthy. This policy helps us to achieve that standard (http://www.doi.gov/scientificintegrity/index.cfm)
-125
-116
49
42
Non Classified
None
Last metadata review date: 20221208
Non classified
None
These data are provided by Bureau of Land Management (BLM) 'as is' and might contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. The information contained in these data is dynamic and may change over time. The data are not better than the sources from which they were derived, and both scale and accuracy may vary across the data set. These data might not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. These data are neither legal documents nor land surveys, and must not be used as such. Official records may be referenced at most BLM offices. Please report any errors in the data to the BLM office from which it was obtained. The BLM should be cited as the data source in any products derived from these data. Any Users wishing to modify the data should describe the types of modifications they have performed. The User should not misrepresent the data, nor imply that changes made were approved or endorsed by BLM. This data may be updated by the BLM without notification.
Generally releasable. However, the data must be reviewed prior to release to assure that no protected data is contained within the dataset.
o Description: Sub-class of Sample Point in the Sampling group. o Geometry: Simple point features. o Topology: No topology enforced. Points may be coincident. o Integration Requirements: o Point locations representing stream origins (inception), seeps/springs, wetlands, non-flowing bodies of water (e.g., lakes, reservoirs, pools, or ponds), stream confluences, complex stream courses, non-stream channels, and periodicity help inform the spatial location or attribute information of the USGS National Hydrography Dataset (NHD) datasets. In most instances, the location or attribute information of the NHD Waterbody, Flowline, and Point datasets should be modified to match the Stream Location Point. o Point locations describing changes of continuity help inform the attribute information in the Hydrography Events datasets. The Hydrography Events dataset for continuity (STRM_CONTINUITY_ARC) should be updated based on the Stream Location Point. o All points inform that the stream was verified in the field. The Hydrography Events dataset for stream verification (STRM_VER_ARC) should be updated based on the Stream Location Point. o Coincident points are allowed in this dataset. Editors should check for and delete unintentional duplicate records, i.e., stacked records with the same attribution.
o Description: Sub-class of Sample Point in the Sampling group. o Geometry: Simple point features. o Topology: No topology enforced. Points may be coincident. o Integration Requirements: o Point locations representing stream origins (inception), seeps/springs, wetlands, non-flowing bodies of water (e.g., lakes, reservoirs, pools, or ponds), stream confluences, complex stream courses, non-stream channels, and periodicity help inform the spatial location or attribute information of the USGS National Hydrography Dataset (NHD) datasets. In most instances, the location or attribute information of the NHD Waterbody, Flowline, and Point datasets should be modified to match the Stream Location Point. o Point locations describing changes of continuity help inform the attribute information in the Hydrography Events datasets. The Hydrography Events dataset for continuity (STRM_CONTINUITY_ARC) should be updated based on the Stream Location Point. o All points inform that the stream was verified in the field. The Hydrography Events dataset for stream verification (STRM_VER_ARC) should be updated based on the Stream Location Point. o Coincident points are allowed in this dataset. Editors should check for and delete unintentional duplicate records, i.e., stacked records with the same attribution.
Data is updated annually, after field season or as needed. Also, it is archived annually, at the end of the fiscal year.
Required attributes have an accuracy of at least ninety percent. Sample points require a high level of positional accuracy (generally within 50 feet) in order to be useful for intended purposes. A sample point represents the location of specific measurement of a particular resource at a point in time. The resource being measured may not even exist in a different (even if nearby) location. It may be critical that a point is located on one side or the other of a stream or road. There may be many sample points close together and different Global Positioning System (GPS) locations obtained with every visit. Accurate location is critical to being able to distinguish points that are supposed to be different from points that are supposed to be in the same location
Unknown
Data is input to feature class by BLM field staff.
Unknown
Dana Baker-Alum
BLM
Senior GIS Applications Developer
(503) 808-6320
P.O. Box 2965
Portland
OR
97208
US
dbakerallum@blm.gov
BLM
BLM
BLM District Offices
Various
Various
BLM
1 - Develop cross-walk to new Stream Locations Points schema: The following point features retained their classification if STRM_LOC_TYPE was equal to: Confluence, Course, and Inception The following point features were reclassified from STRM_LOC_TYPE = 'Other' to one of the following new point types: Dry draw/swale, Lake/Reservoir/Pool/Pond, Lake/Reservoir/Pool/Pond, No Stream, Seep/spring, Wetland, Unstable area. The existing text values captured in the COMMENTS field were used to identify and manually reclassify these features. These changes were reviewed by district hydrologists to verify the accuracy of the modified dataset. Those features that did not fit into the modified dom_STRM_LOC_TYPE retained their classification of STRM_LOC_TYPE = 'Other'. The attribution of STRM_LOC_TYPE = 'Continuity' or STRM_LOC_TYPE = 'Periodicity' points that were spatially coincident (i.e., overlapping) with other Stream Location Points was retained in the overlapping point. These duplicate points (n=493) were subsequently removed from the dataset. Points where STRM_LOC_TYPE = 'Continuity' or STRM_LOC_TYPE = 'Periodicity' points that were not overlapping other Stream Location Points were reclassified to STRM_LOC_TYPE = 'Course' (n=79). 2 - All features were manually reviewed to determine if corresponding edits to the hydrography had already occurred. If NHD_EDITS = 'No', this serves as a flag to notify editors that edits to the hydrography may be needed. 3 - The following quality control (QC) checks were conducted to ensure data integrity: All Stream Location Points must have a SAMPLE_TYPE equal to 'Stream Location Point' When STRM_LOC_TYPE is equal to ‘Inception’, then STRM_SRVY_LOC must be populated with ‘Upper extent’. When STRM_LOC_TYPE is equal to ‘Confluence’, then STRM_SRVY_LOC must be populated with ‘Mid-point’. When STRM_LOC_TYPE is not equal to ‘Wetland’ or ‘Lake/Reservoir/Pool/Pond’, then POINT_TYPE must be populated with ‘Center’. When STRM_LOC_TYPE is equal to ‘Wetland’ or ‘Lake/Reservoir/Pool/Pond’, then POINT_TYPE may be optionally populated with ‘Center’ or 'Perimeter'. When STRM_LOC_TYPE is equal to ‘No stream’ or ‘Unstable area’, then STRM_SRVY_LOC must be populated with ‘Non-stream/Not applicable’. When STRM_LOC_TYPE is equal to ‘Inception’, ‘Course point’, ‘Confluence’, ‘Seep/spring’, ‘Dry draw/swale’, or ‘Other’, then STRM_FLOW, and STRM_CONTINUITY may be optionally populated. When STRM_LOC_TYPE is equal to ‘Other’, then the COMMENTS field must be populated with a detailed description of the feature being recorded.
2020-04-30
Matthew Groce
Bureau of Land Management
GIS Specialist
(208) 373-3959
P.O. Box 2965
Portland
OR
97208
US
mgroce@blm.gov
0
EPSG
6.5(3.0.1)
STRM_LOC_PT_web
Feature Class
0
The Stream Location Points dataset represents field collected spatial locations and basic information about the physical characteristics of a stream network.
BLM
OBJECTID
Internal feature number.
ESRI
OBJECTID
OID
4
0
0
Sequential unique whole numbers that are automatically generated.
SAMPLE_TYPE
Sample Type
The reason for taking the sample at this location. “Stream Location” is the only valid value for this dataset. “Stream Location” is a single domain value in the larger Sample Type domain. It is important to populate this field correctly so that the field is attributed correctly when this data is combined with the parent and/or other sub-classes of the sample point dataset(s).
BLM
String
30
0
0
Stream Location
Stream Location
BLM
STRM_LOC_TYPE
Stream Location Type
The purpose for recording a Stream Location Point, including:
a) Inception Point - The inception point, or stream origin, is the point where flow first appears on the land with enough force to disturb the substrate creating a lasting sign of flow (Nadeau 2015). The inception point is the beginning of the channel or the most upslope expression of well-defined bed and banks, and bed-forms showing annual scour or deposition. Stream origins are often wetlands, springs, seeps or headcuts. When the stream location type is inception point:
• Professional judgement at the time of the survey is the basis for delineation.
• Field verification can happen at any time of the year. Late winter through spring (February-June) is the preferred period because it is easier to see and hear higher flows, flow may extend to the inception point, and reduced vegetation cover makes channels more visible.
• If a surveyor suspects the re-emergence of flow from a spatially interrupted reach, continue upslope until there is no evidence of a channel with well-defined bed and banks, and bed-forms showing annual scour or deposition.
b) Confluence - Location where two or more streams join to form a single channel.
c) Course point - The actual location of the stream channel, typically captured for complex courses.
d) No stream - mapped or modeled stream channel that is not present, as verified by field surveys.
e) Seep/spring - a location where groundwater emerges onto the land surface, sometimes just a trickle after a rain event and sometimes in a continuous flow.
f) Dry draw/swale - a slight depression in the landscape that serves as a vegetated flow path, but lacks differentiation between bed and bank and may contain standing water or an ephemeral stream
g) Wetland - low-lying areas where water covers the soil or is present for an extended period.
h) Lake/Reservoir/Pool/Pond - large body of non-flowing surface water that can occur naturally or be man-made.
i) Unstable area - area above or adjacent to stream channel that is likely to deliver material (e.g., sediment and wood) to the stream upon failure.
j) Other - other field collected information about locations within a stream network
BLM
String
30
0
0
Inception Point
Inception Point
BLM
Confluence
Confluence
BLM
Course Point
Course Point
BLM
No Stream
No Stream
BLM
Seep/Spring
Seep/Spring
BLM
Dry Draw/Swale
Dry Draw/Swale
BLM
Wetland
Wetland
BLM
Lake/Reservoir/Pool/Pond
Lake/Reservoir/Pool/Pond
BLM
Unstable Area
Unstable Area
BLM
Other
Other
BLM
POINT_TYPE
Point Type
Specifies where the point is being taken in relation to the feature being recorded.
BLM
String
10
0
0
Center
Center - A point corresponding to the geometric center of the feature.
BLM
Perimeter
Perimeter - A point, that may be part of a series of points, representing the outline of the area feature
BLM
SRVY_LOC
Survey Location
The physical location of the surface water feature along the stream channel. Stream Location Points that do not correspond directly on a stream should be recorded as Non-stream/NA.
BLM
String
30
0
0
Upper extent
Upper extent – Upper extent of a stream feature or a transition in periodicity/ continuity
BLM
Mid-point
Mid-point – Mid-point data capture
BLM
Lower extent
Lower extent – Lower extent of a stream feature or a transition in periodicity/continuity
BLM
Non-stream/NA
Non-stream/NA – Point does not fall on a stream or survey location is not applicable
BLM
STRM_FLOW
Stream Periodicity
Captures the transition point of the temporal expression of stream flow. A stream reach may be: a) Perennial - Perennial streams generally have a well-defined channel that contains water continuously during a year of normal rainfall, often with the streambed located below the water table for most of the year. Groundwater supplies the baseflow for perennial streams, but flow is also supplemented by stormwater runoff and snowmelt. b) Intermittent - Intermittent streams contain water for only part of the year, typically during winter and spring when the streambed may be below the water table and/or when snowmelt from surrounding uplands provides sustained flow. Streamflow may vary greatly with stormwater runoff. c) Ephemeral - Ephemeral streams flow only in direct response to large precipitation events or stormwater runoff. An ephemeral stream may or may not have a well-defined channel, the stream bed is always above the water table, and stormwater runoff is the primary source of water. While the periodicity of a stream is determined by the dominant or the most representative features within a reach, the distinction between perennial, intermittent, and ephemeral channels is often dependent on a wide range of temporal and spatial scales. Ephemeral and intermittent streams are common in the semiarid landscapes of eastern Oregon and have distinctly different characteristics from the perennial streams that are found in the wetter, more humid climate of western Oregon. While the stream flow definitions provided above give a broad understanding of these terms, relevant terminology within local Resource Management Plans should be consulted. Application of local management plans ensures that stream periodicity attribution is in alignment with land use allocations and overall management direction.
In the Oregon Forest Practices Act, a key distinction between perennial and intermittent streams is that the former is defined as a stream that normally has summer surface flow after July 15, whereas the latter is defined as a stream that normally does not have summer surface flow after July 15. Although the stream survey date in itself won’t affect a stream’s periodicity, it can influence the surveyor who may or may not be able to key in on the biologic and/or geomorphic stream flow indicators used to determine the flow status of streams, which are often inconspicuous and may not be well defined at all locations or may not be evident at all times.
BLM
0
String
30
0
Perennial
Perennial – Stream that contains flowing water, generally on a year-round basis
BLM
Intermittent
Intermittent – Stream that contains flowing water for only part of the year, typically during winter and spring
BLM
Ephemeral
Ephemeral – Stream that flows during and shortly after large precipitation events
BLM
STRM_CONTINUITY
Stream Continuity
Captures the transition point of the spatial expression of a stream channel.
A stream channel may be:
a) Continuous - Continuous channels are well-defined throughout the reach. In a continuous perennial stream, most of the stream flows at or above the stream bed. In a continuous intermittent stream, most of the stream expresses channel characteristics (evidence of flow and/or deposition) on the stream bed. Water, or evidence of water, may be found flowing or in pools. Continuous flow in a reach may go subsurface for short distances at certain times of the year.
b) Interrupted - Interrupted channels have portions where a defined channel is not evident. Most of an interrupted stream is expressed beneath the ground’s surface. Perennial or intermittent flow, if spatially interrupted, is nearly or entirely subsurface. Evidence of scour and/or deposition is nearly or entirely absent. Headwater streams with dramatic changes in gradient (high to low) or highly permeable substrate can flow subsurface and reappear downstream when the gradient increases again or ground water surfaces. Channels with well-defined beds and banks, and bed-forms showing annual scour or deposition may not be present in areas of spatial interruption, but these areas connect defined upstream and downstream channels. Spatial interruption can be caused by both natural and artificial disruptions.
Stream Location Points capturing interrupted or spatially intermittent stream reaches should be treated differently than Stream Location Points that represent locations of a mapped or modeled stream channel that field surveys have verified is not present (i.e., Stream Location Type is ‘No stream’).
Stream Location Points capturing interrupted or spatially intermittent stream reaches help inform the spatial location or attribute information of the NHD datasets. These locations should be treated differently than Stream Location Points that represent locations of a mapped or modeled stream channel that field surveys have verified is not present (i.e., Stream Location Type is ‘No stream’) and do not inform the NHD.
Although continuity can change on the microscale (feet), the continuity of a channel is determined by the dominant or most representative expression in the reach (usually tens or hundreds of feet).
BLM
0
String
20
0
Continuous
Continuous – flowing water forms a channel with defined bed/banks and evidence of annual scour and deposition
BLM
Interrupted
Interrupted – portions of the channel are not evident or well-defined
BLM
PROJ_NM
Project Name
The name of the associated project to the point that is being measured, monitored, or otherwise sampled.
BLM
String
50
0
0
LASTVISIT_DT
Visit Date
The last date that a sample was taken or measured at this point.
When the data is collected in a field mobile collection application, the value in this field will be automatically populated on import of the data to ArcGIS from the Created Date field, which uses GMT (UTC), as it is assumed that the field visit date is the same as the date the data was captured in the database. The Last Visit Date value can be modified prior to submitting the data to the database. When the data is entered in an ArcGIS desktop application, this field will not be automatically populated from the Created Date as it is assumed that the field visit date is not the same as the date the data was captured in the database.
The default value for this field is 1/1/8888.
BLM
Date
8
0
0
Examples: 6/24/2008, 1/1/1998, 9/1/2001
LASTVISIT_DT_ACC
Visit Date Accuracy
Describes the accuracy of the LASTVISIT_DT date field. The default value for this field is "Day."
BLM
String
7
0
0
Day
Day - Only the exact day, month, and year is known.
BLM
Month
Month - Only the exact month and year is known.
BLM
Year
Year - Only the exact year is known.
BLM
Unknown
Unknown - The accuracy of the date is unknown
BLM
NHD_EDITS
NHD Edits
Indicates whether edits to the NHD Flowline, NHD Point, NHD Waterbody, or NHD Area datasets have been completed.
BLM
String
15
0
0
Y
Yes
BLM
N
No
BLM
NA
Not Applicable
BLM
COORD_SRC
Coordinate Source
The actual source of the GIS coordinates for the points. If the point is copied from another theme, and already has COORD_SRC, it should be reviewed and may need to be changed for use in this dataset.
When the data is collected in a field mobile collection application, the value in this field will be automatically calculated. The field will calculate the quality of the GPS coordinate source used.
BLM
String
7
0
0
CADNSDI
CADNSDI - Lines from or snapped to the CADNSDI dataset
BLM
CFF
CFF - Lines duplicated or buffered from Cartographic Feature Files (USFS)
BLM
DEM
DEM - Digital Elevation Model (30m or better accuracy) used for creation of contours
BLM
DGPS
DGPS - Feature obtained from a Global Positioning System device with Real Time Correction (SBAS)
BLM
DIS
DIS - Lines generated to connect discontinuous features
BLM
DLG
DLG - Lines duplicated or buffered from (24K scale accuracy) USGS Digital Line Graphs
BLM
DOQ
DOQ - Screen digitized linework over digital orthophotography backdrop (DOQ, NAIP, OSIP, or others)
BLM
DRG
DRG - Screen digitized linework over Digital Raster Graphic backdrop
BLM
GCD
GCD - Lines snapped to Geographic Coordinate Database Points
BLM
GPS
GPS - Lines obtained from a Global Positioning System device
BLM
IMG
IMG - Linework derived from interpretation of satellite or other non-photographic imagery
BLM
LiDAR
LiDAR - LiDAR points, lines, or polygons generated through interpretation or analysis.
BLM
MAP
MAP - Digitized coordinates from hardcopy map or onto a map backdrop
BLM
MTP
MTP - Lines duplicated from Digital Master Title Plat
BLM
SOURCEL
SOURCEL - Coordinates duplicated from a BLM GIS source layer.
BLM
SOURCEX
SOURCEX - Source Layer from non-BLM GIS
BLM
SRV
SRV - Survey methods were used to create the linework (e.g., COGO)
BLM
TIGER
TIGER - Tiger Data
BLM
TRS
TRS - Coordinates only given as a legal description (township, range, section)
BLM
UNK
UNK - Unknown coordinate source
BLM
WOD
WOD - WODDB Photogrammetric
BLM
ACCURACY_FT
Accuracy (ft)
How close, in feet, the spatial GIS depiction is to the actual location on the ground. There are several factors to consider in GIS error: scale and accuracy of map-based sources, accuracy of GPS equipment, and the skill level of the data manipulators. A value of “0” indicates no entry was made. This is the correct value when the COORD_SRC is another GIS theme (Digital Line Graphs (DLG), Geographic Coordinate Database (GCD), and Digital Elevation Model (DEM)) because the accuracy is determined by that theme. However, if COORD_SRC is MAP (digitized from a paper map) or GPS, a value of “0” indicates a missing value that should be filled in either with a non-zero number or “-1.” A value of “-1” indicates that the accuracy is unknown, and no reliable estimate can be made.
When the data is collected in a field mobile collection application, the value in this field will be automatically calculated. The field will calculate the estimated GPS accuracy to the 95% confidence interval to meet the National Standard for Spatial Data Accuracy (NSSDA) requirements.
BLM
SmallInteger
2
0
0
Examples: 3 (for high accuracy GPS), 40 (best possible for USGS 24K topo map), 200
SAMPLE_GUID
Sample Unique Identifier
Unique identifier for the Sample Point feature class. The field is used to link table records to sample points.
BLM
GUID
38
0
0
Example: {C36B32EA-88D2-4ACA-9B20-1199A6FADA49}
GLOBALID
GlobalID
An alpha-numeric code that serves as the universal and unique identifier for each feature within the feature class or table of a geodatabase. Software generated value. A field of type UUID (Universal Unique Identifier) in which values are automatically assigned by the geodatabase when a row is created. This field is not editable and is automatically populated when it is added for existing data.
ESRI
GlobalID
38
0
0
Shape
Feature geometry.
ESRI
Coordinates defining the features.
SHAPE
Geometry
0
0
0
Attributes are provided that give basic information about source, type, and accuracy of the line data. More information may be found in the data standard if available: https://www.blm.gov/about/data/oregon-data-management
Simple
FALSE
0
TRUE
FALSE