vector digital data The Ecomap 2025 contains a feature class for five different levels of the National Hierarchical Framework of Ecological Units (the Hierarchy. FSM 2060): Ecological Domains, Ecological Divisions, Ecological Provinces, Ecological Sections, and Ecological Subsections. The Ecomap 2025 data set describes the ecological hierarchy within the conterminous United States. Each feature class contains polygons attributed with the code and name of the ecological unit along with the codes and names of broader scale units into which a given ecological unit is nested. It contains regional geographic delineations for analysis of ecological relationships across ecological units. ECOMAP is the term used for a USDA Forest Service initiative to map ecological units and encourage their use in ecosystem-based approaches to forest and range land conservation and management. This is a collaborative effort with many partners. It is coordinated at the national and regional levels by USDA Forest Service staff and implemented in cooperation with State forestry agencies and others. ECOMAP mapping criteria are outlined in the National Hierarchical Framework of Ecological Units (Cleland et al. 1997, FSM 2060). The framework systematically divides the country into progressively smaller areas that have similar geophysical and biological characteristics and ecological processes. The purpose of the Ecomap 2025 data set is to provide a baseline map of ecological boundaries. The data can be used for ecological analysis of resource distribution patterns and associations among different ecological land units. Cleland, D.T.; Freeouf, J.A.; Keys, J.E., Jr.; Nowacki, G.J.; Carpenter, C; McNab, W.H. 2007. Ecological Subregions: Sections and Subsections of the Conterminous United States [1:3,500,000] [CD-ROM]. Sloan, A.M., cartog. Gen. Tech. Report WO-76. Washington, DC: U.S. Department of Agriculture, Forest Service. https://research.fs.usda.gov/treesearch/48672 2025 Unknown Complete As needed -124.76261517500001 -66.957226296 49.384358 24.545220582 ISO 19115 Topic Categories environment; geoscientific​Information; biota None The USDA Forest Service makes no warranty, expressed or implied, including the warranties of merchantability and fitness for a particular purpose, nor assumes any legal liability or responsibility for the accuracy, reliability, completeness or utility of these geospatial data, or for the improper or incorrect use of these geospatial data. These geospatial data and related maps or graphics are not legal documents and are not intended to be used as such. The data and maps may not be used to determine title, ownership, legal descriptions or boundaries, legal jurisdiction, or restrictions that may be in place on either public or private land. Natural hazards may or may not be depicted on the data and maps, and users should exercise due caution. The data are dynamic and may change over time. The user is responsible to verify the limitations of the geospatial data and to use the data accordingly. USFS Chief Information Office, Enterprise Data Warehouse unknown Washington DC 20250 US SM.FS.data@usda.gov Quality control measures taken by geospatial professionals. Only authoritative data sources of key biophysical factors were used to refine boundaries and inform revisions from subject matter experts. Subject matter expert review was informed by use of prior version, conducting ecological analysis at multiple scales, and field experience. Data entry from subject matter experts is accomplished by authorized Forest Service personnel through a web application behind the U.S. Forest Service firewall and is restricted by access requirement protocols. Data is complete as of publication. The Eastern Region's ecological region concepts extend into Canada and were clipped to conterminous United States to be consistent with other regions. All features integrate vertically to the source data with the highest level of accuracy. The source information used to record spatial locations are from on-screen digitizing with a georeferenced topographic or image background. This layer is an update of the EcoMap 2007 to more appropriately recognize boreal ecosystems within the conterminous United States, incorporate improved mapping at finer scales, and refine map concepts with higher resolution data. Only authoritative data sources were used to inform the mapping process. This update also includes a restructuring and simplification of the ecological framework’s coding. The process involved feedback from regional subject matter experts from across the country. To ensure nested hierarchy, the subsections were aggregated up to domain level. 20250716 Vector Complete chain 12 S_USA.Ecosys_EcomapDivisions_2025 Feature class: A collection of geographic features with the same geometry type (such as point, line, or polygon), the same attributes, and the same spatial reference. ESRI GIS Dictionary OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. DIVISION_CODE Unique code assigned to the division containing 3 digits, 2 identifier digits followed by a trailing 0 (i.e. 310). US Forest Service ID code DIVISION_NAME Descriptive name for the Division. US Forest Service Name of eco-unit DOMAIN_CODE Unique code assigned to the domain containing 3 digits, 1 identifier digit followed by 2 trailing 0's (i.e. 300). US Forest Service ID code DOMAIN_NAME Descriptive name for the Domain. US Forest Service Name of eco-unit GIS_ACRES The area of the feature in acres, calculated in North American Albers Equal Area Conic projection (NAD83) meters and then converted to acres with the formula AreaMeters / 4046.856. US Forest Service Acres SHAPE.AREA Esri field of boundary area in coordinate system units Esri Esri field of boundary length in coordinate system units SHAPE.LEN Esri field of boundary length in coordinate system units Esri Esri field of boundary length in coordinate system units 20251119 USFS Chief Information Office, Enterprise Data Warehouse unknown Washington DC 20250 US Please send an e-mail to the address below. SM.FS.data@usda.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time