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13555800
1.0
FGDC CSDGM Metadata
FALSE
BLM_AK_Easement_17b_point
-1660617.097100
1393000.153700
436273.857000
2381947.745200
1
002
Projected
GCS_North_American_1983
Linear Unit: Meter (1.000000)
NAD_1983_Alaska_Albers
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20220829
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Bureau of Land Management (BLM), Alaska State Office
State Data Administrator
907) 271-3545
222 West 7th Avenue, Stop 13
Anchorage
Alaska
99513
US
s05marti@blm.gov
20220927
ArcGIS Metadata
1.0
Bureau of Land Management (BLM), Alaska State Office
State Data Administrator
907) 271-3545
222 West 7th Avenue, Stop 13
Anchorage
Alaska
99513
US
s05marti@blm.gov
https://gbp-blm-egis.hub.arcgis.com/pages/alaska
Enterprise Geodatabase Feature Class
BLM-STATE
Alaska
BLM-THEME
Authorization
Disturbance
Geospatial
Management
Recreation
Wildlife
NONE
17(b)
access
administrative
Alaska Native Claims Settlement Act
allotment
ANCSA
conveyance
Easement
encumbrance
public
realty
BLM AK Easement 17b (Point)
2022-08-29
U.S. Department of the Interior, Bureau of Land Management (BLM)
U.S. Department of Interior, Bureau of Land Management (BLM), Alaska State Office
Bureau of Land Management
vector digital data
The ANCSA 17(b) Easement dataset represents spatial location and basic information about 17(b) easements within the state of Alaska. ANCSA 17(b) easements are rights reserved to the United States in accordance with 43 CFR 2650.4-7 Public easements. They are reserved to provide access to public lands or major waterways. Examples of types of reservations include transportation easements, including 60-foot wide existing roads, 100-foot wide proposed roads, 25- and 50-foot existing and proposed trails; site easements; and miscellaneous easements. These rights are reserved when the BLM conveys land to a Native corporation under the Alaska Native Claims Settlement Act (ANCSA).
These data can be used to assist the public in understanding where and how they can access public lands across conveyed native lands. Agencies and government entities can utilize the data for on-the-ground management of the easements. Data may also be used for land planning. This data may not accurately represent physical features and should not be used as such.
Bureau of Land Management (BLM), Alaska State Office
Bureau of Land Management (BLM), Alaska State Office
State Data Administrator
(907) 271-3545
222 West 7th Avenue, Stop 13
Anchorage
Alaska
99513
US
s05marti@blm.gov
Bureau of Land Management (BLM), Alaska State Office
State Data Administrator
222 West 7th Avenue, Stop 13
Anchorage
AK
99513
US
jlotz@blm.gov
17(b)
access
administrative
Alaska
Alaska Native Claims Settlement Act
allotment
ANCSA
Authorization
conveyance
Disturbance
Easement
encumbrance
Geospatial
location
Management
public
realty
Recreation
transportation
Wildlife
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.
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.
None, these data are considered public domain.
Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595
true
-179
-129.9
71.3
51.4
publication date
2019-11-01
The Easement_17b feature dataset highlights access to BLM administered lands surrounded/isolated by native lands. They are physical entities such as roads, trails and power lines. Each Easement is described within the conveyance document associated with the action. Historically, the official record for delineating 17(b) Easements was drawn on USGS Quadrangle maps. (https://sdms.ak.blm.gov/scanned_images/esmtindex.html).
1
-179
-129.9
71.4
51.3
Last metadata review date: 20191101
Attributes are populated through a manual process that requires cross referencing BLM Alaska legal documents.
All .tif files have been georeferenced then mosaicked for statewide coverage (were applicable) for ANCSA 17(b) Easement coverage prior to the digitization process.
Source input layers were USGS Quad maps with hand drawn or AutoCAD ANCSA 17(b) Easement lines that were converted to .tif files. The easement lines were then digitized in the ArcGIS Environment using the centerline at a scale of 1:3000 with coverage over the entire State of Alaska were applicable. The user must understand that while the digitized line now has a spatial reference, it may not be were the trail is in use on the ground. No alteration of the digitized line may occur unless a MOA with the land owner is processed and approved by BLM Alaska.
The horizontal accuracy is contingent upon the quality of the georeferenced .tif input files.
This dataset is transitory and have varying degrees of accuracy. Accuracy is reviewed and improved, if possible, through coordination with the land owner over which lands the easement is reserved. ANCSA 17(b) easements have been reserved since the early 1970s on large scale USGS Quad Maps, often with felt-tip marker drawn to depict 25′ and 50′ existing and proposed trails, and 60′ existing roads, and 100′ proposed roads. The nomination and reservation process did not require the easements to be surveyed, nor did it require on the ground location. Because the purpose of the easement was to preserve public access to public lands after lands have been conveyed out of Federal ownership, there were many instances where easements are reserved for a proposed trail or road to be built. Due to limitations in map making abilities, there are many instances where the easement was reserved in a location that does not properly depict the location of the trail or road the easement intended to reserve the right to access. When the easement does not align with the trail or road where the access is occurring, the users of the road and trail are technically in trespass on the Native Corporation lands. Resolution to this issue will be one of two ways depending on how far off the depiction of the easement is from the actual location of the access. If the easement depiction of the map changes, but the description of the easement in the Interim Conveyance (IC) or patent remains unchanged, then the easement location can be adjusted with a Recordable Memorandum of Agreement between the BLM, the Land Owner, and the Administering Agency (if applicable). If the easement description of the IC or patent is altered by a change in the map depiction, either by a legal land description change (for example the trail started in Sec. 1 and now starts in Sec. 2), or by a topographical description change (for example an easement goes to the west of the mountain, and now runs to the east), an easement exchange will be required. This is a formal title action that requires the BLM to follow all acquisition requirements in accepting the donation of a new easement in order for the termination of the existing easement. When easement corrections are made, thru either the MOA process or the easement exchange, the level of accuracy of the easements will greatly increase. As GPS data becomes available, this data will be reviewed to determine if the line work mirrors the reserved easement and the feature’s Coord_Source attribute will reflect that the data was acquired via GPS. If the GPS line does not mirror the easement reserved, a MOA or easement exchange is required prior to altering the line work to reflect the more accurate data collection method. This dataset will never be complete. Over time, the land entitlement will be met for Native Corporations and the ability to initially reserve easements at conveyance will end. However, there will continue to be work after the lands convey to address easement usability and compatibility needs.
2019-11-01
Bureau of Land Management (BLM), Alaska State Office
State Data Administrator
(907) 271-3545
222 West 7th Avenue, Stop 13
Anchorage
Alaska
99513
US
s05marti@blm.gov
960
BLM_AK_Easement_17b_Point
ANCSA 17(b) Easements linear features within Alaska
Feature Class
960
OBJECTID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
OBJECTID
OID
4
10
0
SHAPE
Feature geometry.
Esri
Coordinates defining the features.
Shape
Geometry
8
0
0
Easement_ID
This is a concatenation of the Quad that the easement(s) lies within and the EIN (refer to the EIN attribute definition for more information about the EIN). This field is used in the editing process, it is the only way to tell the difference between easements that were given the same EIN number on a different quads. In geology or geography, the word "quadrangle" usually refers to a United States Geological Survey (USGS) 7.5-minute quadrangle map, which are usually named after a local physiographic feature. In this example, ILID4_30aC5D1, the first five letters indicate the referenced Quad – Iliamna D4 and the last half after the underscore, 30aC5D1, is the specific EIN within the quad. This field is auto-generated through a model after versions are checked in. The purpose of this field is for analysis at a later time.
Concatenation of the Quad that the easement lies within and the EIN.
Easement ID
String
25
0
0
Conveyance_Doc_Type
A Conveyance Document is a written instrument which passes legal title to real property from one party to another. The “Conveyance Document Type” for reserving 17(b) easements is though ICs, or an “Interim Conveyance” which is used when the land is conveyed prior to survey. If the land has been surveyed, it will then be listed as “PA” or “Patent”. Lands transferred by IC will receive a patent with a unique patent number once the survey is complete. This is populated manually to indicate the status of the easement.
Easement_17b_Conveyance_Doc_Type
ANCSA 17(b) Easement Spatial Data Standard
Conveyance Doc Type
String
2
0
0
Conveyance_Doc_No
A Conveyance Document Number is a number assigned to the Conveyance Document for cataloging and future reference for identification. The Conveyance Document transfers the land out of Federal ownership.
Conveyance Document Number
Conveyance Doc No.
String
10
0
0
Easement_Status
Easement Status is a reference to how the easement was established, or, in the case of “Nominated”, it is only identified to be established should the land convey. “Easement Status” is different from “Easement type”.
Easement_17b_Status
ANCSA 17(b) Easement Spatial Data Standard
Easement Status
String
9
0
0
Easement_Category
Subtype code and category of: 1. Transportation, 2. Site, and 3. Miscellaneous, that when selected, trigger the domain values for Easement_Type. This is used to quickly populate the associated input Easement_type for the person doing edits.
Easement_Category
ANCSA 17(b) Easement Spatial Data Standard
Easement Category
Integer
4
10
0
Easement_Type
Transportation easements can generally be described as trails and roads which are reasonably necessary to guarantee the public's ability to reach publicly owned lands or major waterways across lands conveyed to Native corporations. Site easements can be thought of as site specific, i.e. areas for aircraft landings, vehicle parking, temporary camping, and loading and/or unloading of boats, ATVs or other off road transportation. Miscellaneous easement are reserved to allow certain continued use of publicly owned lands and major waterways. Examples may include: utility purposes (water, electricity, communications, oil, gas, sewage, etc.), air or light monitoring, viability purposes to insure public safety, or to permit proper use of improvement areas developed for public benefit or use.
Easement_17b_Type_Miscellaneaous, Easement_17b_Type_Site, or Easement_17b_Type_Transportion
ANCSA 17(b) Easement Spatial Data Standard
Easement Type
String
150
0
0
EIN
The Easement Identification Number or EIN, is assigned to an easement through the easement identification process and maintained to identify the easement in the conveyance document. Easement Identification Numbers are not unique, so queries should not be based on the EIN as multiple selections will be returned with the same EIN. The EIN is only unique to the associated conveyance document.
Alphanumeric values, not unique
EIN
String
25
0
0
Use_Restrictions
Identifies any restrictions for the standard allowable uses for different easement types.
Easement_17b_Use_Restrictions
ANCSA 17(b) Easement Spatial Data Standard
Use Restrictions
String
15
0
0
Land_Owner
The name on the IC or patent conveyance document who the land was transferred to when it left Federal ownership.
Easement_17b_Land_Owner
ANCSA 17(b) Easement Spatial Data Standard
Land Owner
String
250
0
0
Admin_Agency
The agency that has been officially transferred the administration of the 17(b) easement. Often this is the agency that manages the land that the easement accesses. BLM is the Admin_Agency by default.
Easement_17b_Admin_Agency
ANCSA 17(b) Easement Spatial Data Standard
Admin. Agency
String
40
0
0
Admin_Transferred
This identifies if the administration of the easement has officially been transferred to the agency that the land accesses. If no, BLM administers the easement.
DOM_YES_NO
ANCSA 17(b) Easement Spatial Data Standard
Admin. Transferred
String
7
0
0
Land_Accessed
Regardless of which agency actually administers the easement, this identifies the unit of land accessed by the easement. For example, if the admin agency should be the Forest Service, the unit would be either the Tongass or Chugach National Forest.
Easement_17b_Land_Accessed
ANCSA 17(b) Easement Spatial Data Standard
Land Accessed
String
100
0
0
Conveyance_Doc
This field displays a hyperlink to the Conveyance Document that identifies the linear or point feature and its associated EIN(s).
URL
Conveyance Doc.
String
250
0
0
Common_Name
Common Name
String
50
0
0
The Common Name refers to the name associated with an easement by the local population, such as a site name.
Attributes definition aid in depicting ANCSA 17(b) Easement Linear Features
dataset
EPSG
6.12(9.3.0.0)
Simple
FALSE
960
TRUE
FALSE