Name: Baltimore Forest Patches
Display Field: patch_type
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: This forest patch layer was created using a 2017/18 high-resolution urban tree canopy map of Baltimore City derived from LiDAR and NAIP imagery (CBPO 2022). To identify forest area, tree canopy over impervious surfaces was first subtracted from the canopy layer, including buildings and roads identified from planimetric data available from Baltimore City (https://data.baltimorecity.gov/). Morphological spatial pattern analysis (MSPA; Vogt et al. 2007) was then used to distinguish forest patches from remaining tree canopy using an edge parameter of 15 m based on observed changes in vegetation composition and structure (Baker, unpublished data). MSPA applies the edge parameter to distinguish interiors (i.e. ‘cores’) from surrounding edges, as well as five other morphometric primitives (i.e. branches, bridges, loops, and islets) that reflect how canopy is or is not connected to cores. Patches always include core areas and their surrounding edges, as well as any perforations. Patches are separated into two size classes: Forested Natural Areas are patches with greater core area and thickness than Groves. Patches are classified by land ownership categories using local parcel data available from Baltimore City (https://data.baltimorecity.gov/). Ownership categories include: Federal, State, Municipal, Commercial/Industrial, Institutional, and Private Residential owners. Parcels with unknown ownership were assigned Municipal ownership.
Copyright Text: Chesapeake Bay Program Office (CBPO), 2022. One-meter Resolution Land Cover Dataset for the Chesapeake Bay Watershed, 2017/18. Developed by the
University of Vermont Spatial Analysis Lab, Chesapeake Conservancy, and U.S. Geological Survey. [Accessed July 1, 2024], [https://www.chesapeakeconservancy.org/conservation-innovation-center/high-resolution-data/lulc-data-project-2022/].
Vogt P, Riitters K H, Estreguil C, Kozak J, Wade T G and Wickham J D 2007 Mapping spatial patterns with morphological image processing Landsc. Ecol. 22 171–7. https://doi.org/10.1007/s10980-006-9013-2
Min. Scale: 0
Max. Scale: 0
Default Visibility: false
Max Record Count: 2000
Supported query Formats: JSON, geoJSON, PBF
Use Standardized Queries: True
Extent:
XMin: -8539459.0325
YMin: 4749990.395
XMax: -8519243.9194
YMax: 4775099.8993
Spatial Reference: 102100 (3857)
Drawing Info:
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HasZ: false
HasM: false
Has Attachments: false
Has Geometry Properties: true
HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText
Object ID Field: OBJECTID
Unique ID Field:
IsSystemMaintained : True
Global ID Field:
Type ID Field: patch_type
Fields:
- OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
- patch_id (type: esriFieldTypeDouble, alias: Unique ID for patch, SQL Type: sqlTypeOther, nullable: true, editable: true)
- patch_type (type: esriFieldTypeString, alias: Patch type, SQL Type: sqlTypeOther, length: 80, nullable: true, editable: true)
- n_own_typ (type: esriFieldTypeInteger, alias: Number of patch owners, SQL Type: sqlTypeOther, nullable: true, editable: true)
- n_parcels (type: esriFieldTypeInteger, alias: Number of parcels intersecting with patch , SQL Type: sqlTypeOther, nullable: true, editable: true)
- patch_area (type: esriFieldTypeDouble, alias: Patch area in acres, SQL Type: sqlTypeOther, nullable: true, editable: true)
- Shape__Area (type: esriFieldTypeDouble, alias: Shape__Area, SQL Type: sqlTypeDouble, nullable: true, editable: false)
- Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)
Types:
ID: Grove
Name: Grove
Domains:
Templates:
Name: Grove
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
ID: Forested Natural Area
Name: Forested Natural Area
Domains:
Templates:
Name: Forested Natural Area
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:
Attributes:
- patch_type: Forested Natural Area
Is Data Versioned: false
Has Contingent Values: false
Supports Rollback On Failure Parameter: true
Last Edit Date: 10/16/2024 4:33:47 PM
Schema Last Edit Date: 10/16/2024 4:33:47 PM
Data Last Edit Date: 10/16/2024 2:59:45 PM
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