20260915 16562200 1.0 TRUE 150000000 5000 BLM-STATE Alaska Arizona California Colorado Eastern States Idaho Montana Nevada New Mexico Oregon Utah Wyoming BLM-THEME Anthropology Endangered Facility Geology Geospatial Management Paleontology Recreation Vegetation Wildlife Withdrawal NONE BLM Bureau of Land Management Jurisdiction National Conservation Areas National Monuments Public Lands United States Western States This dataset has been generalized in an effort to meet program performance requests and/or requirements within a feature service. The generalized geometry may not reflect the original data perfectly and should be taken into account when running certain analysis types. Changes to the current generalized process are ongoing and this service should not be considered final. This feature class includes Cooperative Management and Protection Areas, Forest Reserves, National Conservation Areas, National Monuments, and Outstanding Natural Areas. Descriptions of each type of polygon found in this feature class can be found on Page 21 of the National Landscape Conservation System (NLCS) Implementation Guidelines (Version 1.1). The Bureau of Land Management's National Conservation Lands include 19 national monuments in nine western states. These national monuments encompass landscapes of tremendous beauty and diversity, ranging from rugged California coastline to vividly-hued desert canyons. The Antiquities Act of 1906 grants the President authority to designate national monuments in order to protect “objects of historic or scientific interest.” National conservation areas (NCAs) and similarly designated lands are designated by Congress to conserve, protect, enhance, and manage public lands for the benefit and enjoyment of present and future generations. The Bureau of Land Management's National Conservation Lands include 16 NCAs and five similarly designated lands in ten states. These lands feature exceptional scientific, cultural, ecological, historical, and recreational values. They differ tremendously in landscape and size, varying from the coastal beauty of California's 18-acre Piedras Blancas Light Station Outstanding Natural Area to the rugged desert vistas of Nevada's 1.2 million acre Black Rock Desert-High Rock Canyon Emigrant Trails NCA. <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Many of the BLM National Datasets cannot be taken offline due to the number of vertices in the dataset. In addition, displaying the data using a Feature Service crashes ArcGIS Server due to complex geometries (ie Godzilla polygons). As a result, it became imperative to generalize the Feature Classes so that they can be used in a Feature Service as well as being taken offline. Using configuration settings, the user may choose between using a Smoothing algorithm or Simplification algorithm to perform generalization. Documentation on the Smoothing algorithm can be found here: https://pro.arcgis.com/en/pro-app/latest/tool-reference/cartography/smooth-polygon.htm Documentation on the Simplification algorithm can be found here: https://pro.arcgis.com/en/pro-app/latest/tool-reference/cartography/simplify-polygon.htm Note: At the time of this writing, only polygon smoothing/simplification is tested. However, Linear datasets are also supported (FEATURE_TYPE) *Each of the features within this feature class were generalized. To keep the naming convention the same, we added the _gen after each feature class so this service and the data layers won’t get confused with the other NLCS services. This service and the underlying data will be kept “in-sync” with national replication. </SPAN></P><P><SPAN>This polygon feature class represents the spatial extent and boundaries of the BLM National Landscape Conservation System (NLCS) National Monuments, National Conservation Areas and Similar Designations. This dataset is a subset of the official national dataset, containing features and attributes intended for public release and has been optimized for online map service performance. The Implementation Guide represents the official national dataset from which this dataset was derived.</SPAN></P></DIV></DIV></DIV> Bureau of Land Management, Headquarters (HQ) Bureau of Land Management U.S. Department of the Interior, Bureau of Land Management (BLM) BLM Natl NLCS National Monuments National Conservation Areas Polygons 20260917 Bureau of Land Management Name: Bureau of Land Management Role: Publisher Headquarters (HQ) Publisher Denver Federal Center, Bldg. 85 Denver CO 80225-0047 BLM_Press@blm.gov US Alaska Anthropology Arizona BLM boundaries Bureau of Land Management California Colorado Eastern States Endangered environment Facility Geology geoscientificInformation Geospatial Idaho Jurisdiction location Management Montana National Conservation Areas National Monuments Nevada New Mexico Oregon Paleontology planningCadastre Public Lands Recreation structure United States Utah Vegetation Western States Wildlife Withdrawal Wyoming 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. -124.080830 -105.427386 48.071246 32.345997 1 20260917 Bureau of Land Management Headquarters (HQ) Publisher Name: Bureau of Land Management Role: Publisher Denver Federal Center, Bldg. 85 Denver CO 80225-0047 BLM_Press@blm.gov US 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. 20260917 76E8F1E8-8C5B-4C94-BEB7-5411E8F6B050 Bureau of Land Management Headquarters (HQ) Publisher Name: Bureau of Land Management Role: Publisher Denver Federal Center, Bldg. 85 Denver CO 80225-0047 BLM_Press@blm.gov US Last metadata review date: 20260917 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. None, these data are considered public domain. Report Report Report Report Process Step 20260917 Bureau of Land Management Headquarters (HQ) Publisher Name: Bureau of Land Management Role: Publisher Denver Federal Center, Bldg. 85 Denver CO 80225-0047 BLM_Press@blm.gov US https://blm-egis.maps.arcgis.com/home/item.html?id=8defb341035545ed9560effea919484e#overview Bureau of Land Management Headquarters (HQ) Publisher False Name: Bureau of Land Management Role: Publisher Denver Federal Center, Bldg. 85 Denver CO 80225-0047 BLM_Press@blm.gov US Overview Feature Feature