Parent Layer:
Level IV Ecoregions (December 2011) IMPORTANT: read layer description
Name: Level IV Ecoregion Lines (Scale LT 9,000,000)
Display Field: US_L4CODE
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: IMPORTANT information regarding proper legend rendering in ArcMap: Due to the limitations of Graphical Device Interface (GDI) resources per application on Windows, ArcMap does not display the legend in the Table of Contents for the ArcGIS Server service layer if the legend has more than 100 items. As of December 2011, there are 968 unique legend items in the Level IV Ecoregion Polygon legend. Follow this link (http://support.esri.com/en/knowledgebase/techarticles/detail/33741) for instructions about how to increase the maximum number of ArcGIS Server service layer legend items allowed for display in ArcMap. Note the instructions at this link provide a slightly incorrect path to "Maximum Legend Count". The correct path is HKEY_CURRENT_USER > Software > ESRI > ArcMap > Server > MapServerLayer > Maximum Legend Count. When editing the "Maximum Legend Count", update the field, "Value data" to 1000. To download a PDF version of the Level IV ecoregion map and legend, go to ftp://ftp.epa.gov/wed/ecoregions/us/Eco_Level_IV_US_pg.pdf. Please read the remainder of this layer description for general information about Level IV Omernik Ecoregions. This layer represents Level IV Omernik Ecoregions. Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. Compilation of the level IV maps, performed at 1:250,000 scale, has been a part of collaborative projects between US Environmental Protection Agency, National Health and Environmental Effects Laboratory (NHEERL)--Corvallis, OR, the US Forest Service, Natural Resources Conservation Service, and a variety of other state and federal resource agencies. The ecoregions and subregions are designed to serve as a spatial framework for environmental resource management. The most immediate needs by the states are for developing regional biological criteria and water resource standards, and for setting management goals for nonpoint-source pollution. Level IV ecoregions are intended for large geographic extents (i.e. states, multiple counties, or river basins). Use for smaller areas, such as individual counties or a 1:24,000 scale map boundary, is not recommended. Explanation of the methods used to delineate the ecoregions are given in Omernik (1995), Griffith et al. (1994), and Gallant et al. (1989). For more information about Omernik ecoregions or to download ecoregion maps and GIS data, go to: http://www.epa.gov/wed/pages/ecoregions.htm.
Copyright Text: US EPA Office of Research and Development (ORD)
Default Visibility: true
MaxRecordCount: 1000
Supported Query Formats: JSON, geoJSON
Min Scale: 9000000
Max Scale: 0
Supports Advanced Queries: true
Supports Statistics: true
Has Labels: false
Can Modify Layer: true
Can Scale Symbols: false
Use Standardized Queries: true
Supports Datum Transformation: true
Extent:
XMin: -1.38852349811E7
YMin: 2819831.1253000014
XMax: -7452820.5898
YMax: 6340333.2016
Spatial Reference: 102100
(3857)
Drawing Info:
Renderer:
Simple Renderer:
Symbol: Style: esriSFSSolid
Color: [0, 0, 0, 0]
Outline:
Style: esriSLSSolid
Color: [104, 104, 104, 255]
Width: 0
Label:
Description:
Transparency: 0
Labeling Info:
Advanced Query Capabilities:
Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
HasZ: false
HasM: false
Has Attachments: false
HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText
Type ID Field: null
Fields:
-
OBJECTID
(
type: esriFieldTypeOID, alias: OBJECTID
)
-
Shape
(
type: esriFieldTypeGeometry, alias: Shape
)
-
US_L4CODE
(
type: esriFieldTypeString, alias: US_L4CODE, length: 10
)
Supported Operations:
Query
Generate Renderer
Return Updates
Iteminfo
Thumbnail
Metadata