Name: tree_canopy_2020

Display Field: CLASS

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Tree Canopy is defined as vegetation 8 feet tall or higher. Montgomery Planning regularly purchases LiDAR data to support various products, and the interactive tool you will see below is is one such product. Four band infrared imagery is combined with LiDAR to extract our tree canopy layers. The 2009, 2014, and 2018 tree canopy layers used the "QL2" LiDAR standard, which captures only 4 samples per square meter. Starting with the department’s 2020 tree canopy layers, a higher quality LiDAR standard called "QL1" was used. This new technology captures 8 samples per square meter. The new QL1 technology is better able to capture smaller saplings that the QL2 technology could have have missed. QL1 also has the ability to better detect the fringes of tree canopy. Because of the higher resolution of QL1, the overall tree canopy capture for any given area is higher than it would be if it were measured by the older QL2 today. For more information, contact: GIS Manager Information Technology & Innovation (ITI) Montgomery County Planning Department, MNCPPC T: 301-650-5620

Service Item Id: cd09659612b341f5bd561b0045afeeaf

Copyright Text: Information Technology & Innovation (ITI), Montgomery County Planning Department, MNCPPC University of Vermont Spatial Lab

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

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: -8630514.196377315
YMin: 4712185.225480109
XMax: -8559170.462547692
YMax: 4772453.632950449
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
Simple Renderer:
Symbol:
Style: esriSFSSolid
Color: [38, 115, 0, 255]
Outline:
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Color: [110, 110, 110, 0]
Width: 0
Label: N/A
Description: N/A
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
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false
Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: true
Supports Time Relation: true
Supports Sql Format: false
Supports Query Analytic: false
Supports Query With Current User: true

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 )
• CLASS ( type: esriFieldTypeString, alias: Tree Canopy Change Class, length: 255 )
• VERTEX ( type: esriFieldTypeInteger, alias: VERTEX )
• SHAPE_Length ( type: esriFieldTypeDouble, alias: SHAPE_Length )
• SHAPE_Area ( type: esriFieldTypeDouble, alias: SHAPE_Area )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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