Layer: HEX % Tree Canopy Metrics (ID:2)

View In: Map Viewer

Name: HEX % Tree Canopy Metrics

Display Field: GRID_ID

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Tree Canopy (TC) Assessment metrics for Boston, MA. These datasets consist of TC metrics summarized using various geographies. The metrics presented in these tables are based on 2019 high resolution land cover and 2019 leaf-on LiDAR. The TC Assessment is a top-down approach to analyzing the forest. Its purpose is to integrate high resolution land cover data with other GIS datasets to produce a set of detailed metrics on the forest that allow decision makers to know how much tree canopy currently exists (termed Existing TC). Existing TC is determined by extracting all features classified as tree canopy from a high resolution land cover dataset. Possible TC is queried out from this overlay and consists of all land that was not existing canopy, not water, not a building, and not a road. Possible TC is further divided into two subcategories: Possible-impervious and Possible-vegetation. Possible-impervious consists of all impervious land that, through modification, could support tree canopy. Examples of such features are parking lots, driveways (through overhanging coverage) and playgrounds. Possible-vegetation consists of all land that is low-lying vegetation, primarily grass or shrubs, which could conceivably be converted to support tree canopy. Examples of such features include residential lawns and playing fields. TC metrics do not serve to address the issues of where it is socially desirable or financially feasible to plant trees. Rather, the TC metrics serve as the basis for beginning to form answers to these questions. TC metrics are presented in the attribute table as both absolute area (in map units) and relative area (percentage of land area) per parcel. For example, an Existing TC Area (TC_E_A) value of 13,677 and an Existing TC Percentage (TC_E_P) of 21.8 indicate that for the area in question the area of Existing TC is 13,677 (in map units) and 21.8% of that feature is tree canopy.TC_E_A =Tree canopy existing area. The area of tree canopy present when viewed from above using aerial or satellite imagery, excluding water.TC_PV_A= Possible vegetation area. Grass or shrub area that is theoretically available for the establishment of tree canopy.TC_Land_A = Land area. Land area excluding water bodies.TC_Pi_A= Possible impervious area. Asphalt or concrete surfaces or bare soil, excluding roads and buildings, that are theoretically available for the establishment of tree canopy.TC_P_A= Possible area. Area theoretically available for establishment of tree canopy.TC_E_P = Existing percent. The amount of tree canopy present when viewed from above using aerial or satellite imagery, excluding water as a percentage.TC_Pv_P = Possible vegetation percent. Grass/shrub area that is theoretically available for the establishment of tree canopy as a percentage of land area.TC_P_P= Possible tree canopy percent. Area theoretically suitable for tree canopy as a percentage of land area.TC_Pi_P= Possible impervious canopy percent. Asphalt or concrete surfaces or bare soil, excluding roads and buildings, that are theoretically available for the establishment of tree canopy as a percentage of land area.<div> </div>

Copyright Text: Boston Parks and Recreation Department with the University of Vermont Spatial Analysis Laboratory.

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Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

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GRID_ID (type: esriFieldTypeString, alias: GRID_ID, SQL Type: sqlTypeOther, length: 12, nullable: true, editable: true)
TC_ID (type: esriFieldTypeInteger, alias: TC_ID, SQL Type: sqlTypeOther, nullable: true, editable: true)
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TC_ID_1 (type: esriFieldTypeInteger, alias: TC_ID_1, SQL Type: sqlTypeOther, nullable: true, editable: true)
VALUE_0 (type: esriFieldTypeDouble, alias: VALUE_0, SQL Type: sqlTypeOther, nullable: true, editable: true)
TC_E_A (type: esriFieldTypeDouble, alias: TC_E_A, SQL Type: sqlTypeOther, nullable: true, editable: true)
TC_Pv_A (type: esriFieldTypeDouble, alias: TC_Pv_A, SQL Type: sqlTypeOther, nullable: true, editable: true)
TC_Land_A (type: esriFieldTypeDouble, alias: TC_Land_A, SQL Type: sqlTypeOther, nullable: true, editable: true)
TC_Pi_A (type: esriFieldTypeDouble, alias: TC_Pi_A, SQL Type: sqlTypeOther, nullable: true, editable: true)
TC_P_A (type: esriFieldTypeDouble, alias: TC_P_A, SQL Type: sqlTypeOther, nullable: true, editable: true)
TC_E_P (type: esriFieldTypeDouble, alias: TC_E_P, SQL Type: sqlTypeOther, nullable: true, editable: true)
TC_Pv_P (type: esriFieldTypeDouble, alias: TC_Pv_P, SQL Type: sqlTypeOther, nullable: true, editable: true)
TC_P_P (type: esriFieldTypeDouble, alias: TC_P_P, SQL Type: sqlTypeOther, nullable: true, editable: true)
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Last Edit Date: 5/14/2021 11:56:39 AM

Schema Last Edit Date: 5/14/2021 11:56:39 AM

Data Last Edit Date: 5/14/2021 11:56:39 AM

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