Mosaics/NWTCG_LiDAR_DSM_External_Referenced (ImageServer)

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View Footprint In: ArcGIS Online Map Viewer

Service Description:

Compilation of historical and recent digital elevation models (surface models) derived through Light Detection and Ranging (LiDAR) data of the Northwest Territories. The compilation represents georeferenced coverage of very high resolution data (1 m spatial resolution) of NWT communities, infrastructure corridors, and other areas of interest. Digital surface models (DSM) represent the elevations of both the natural and built environment, including bare ground, vegetation, and buildings. Elevations are referenced to either the CGVD28 HT2.0 (Canadian Geodetic Vertical Datum of 1928, Height Transformation 2.0; unknown epochs) or the current CGVD2013 (Canadian Geodetic Vertical Datum of 2013) vertical datum, however, for a limited number of datasets the vertical datum is unknown. Models were derived from LiDAR pointclouds at 1-m spatial resolution. LiDAR vendors may have performed positional adjustments based on ground control points where necessary based on project requirements. Positional and elevation accuracies are project-specific, with limited independent validation.

Name: Mosaics/NWTCG_LiDAR_DSM_External_Referenced

Description:

Single Fused Map Cache: false

Extent:

Initial Extent:

Full Extent:

Time Info:

[2009/01/01 00:00:00 UTC, 2024/12/31 00:00:00 UTC]

Pixel Size X: 0.9962480599999998

Pixel Size Y: 0.9962480600000003

Band Count: 1

Pixel Type: F32

RasterFunction Infos: {"rasterFunctionInfos": [ { "name": "Elevation (Stretch)", "description": "Set stretch properties to visualize elevation values. Standard deviation stretch is used and applies a linear stretch between values within two standard deviations (minimum: 0 m, maximum 1000 m). Dynamic Range Adjustment is enabled so that statistics are calculated from pixels displayed on the screen.", "help": "" }, { "name": "Aspect (numeric)", "description": "Aspect (numerical)", "help": "" }, { "name": "Aspect (RGB colour map)", "description": "Aspect RGB map with flat areas (returning -1) shown in gray .", "help": "" }, { "name": "Slope (numeric)", "description": "Slope calculated as degrees.", "help": "" }, { "name": "Slope (RGB colour map)", "description": "Slope represented as a RGB map for visualization purposes.", "help": "" }, { "name": "Hillshade multidirectional", "description": "Hillshade calculated based on multidirectional viewpoints.", "help": "" }, { "name": "Shaded relief multidirectional", "description": "Shaded relief calculated based on multidirectional vliewpoints.", "help": "" }, { "name": "Contour lines (cartographic)", "description": "Contour Lines with 1m interval whereby every 5th line is bold. 10m adaptive smoothing is used for optimal cartographic representation at any scale.", "help": "" }, { "name": "Normalized Heights", "description": "Normalized DSM as a proxy for building/vegetation height. \n- Subtracted DTM from DSM \n- Reset any values less than 0.2 m to 0 m\n- Trim any value greater than 100 m to preserve visible range.", "help": "" }, { "name": "None", "description": "", "help": "" } ]}

Mensuration Capabilities: Basic

Has Histograms: false

Has Colormap: false

Has Multi Dimensions : false

Rendering Rule:

Min Scale: 0

Max Scale: 0

Copyright Text: NWT Centre for Geomatics

Service Data Type: esriImageServiceDataTypeElevation

Min Values: N/A

Max Values: N/A

Mean Values: N/A

Standard Deviation Values: N/A

Object ID Field: OBJECTID

Fields:

OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
Name ( type: esriFieldTypeString, alias: Name, length: 200 )
Category ( type: esriFieldTypeInteger, alias: Category , Coded Values: [0: Unknown] , [1: Primary] , [2: Overview] , ...5 more... )
Tag ( type: esriFieldTypeString, alias: Tag, length: 100 )
GroupName ( type: esriFieldTypeString, alias: GroupName, length: 100 )
ProductName ( type: esriFieldTypeString, alias: ProductName, length: 100 )
Year ( type: esriFieldTypeInteger, alias: Year )
Source ( type: esriFieldTypeString, alias: Source, length: 255 )
License ( type: esriFieldTypeString, alias: License, length: 255 )
VDatum ( type: esriFieldTypeString, alias: VDatum, length: 255 )
Shape ( type: esriFieldTypeGeometry, alias: Shape )

Default Mosaic Method: ByAttribute

Allowed Mosaic Methods: ByAttribute,None,LockRaster

SortField: Year

SortValue: 3000

Mosaic Operator: Last

Default Compression Quality: 80

Default Resampling Method: Bilinear

Max Record Count: 1000

Max Image Height: 15000

Max Image Width: 15000

Max Download Image Count: 10

Max Mosaic Image Count: 228

Allow Raster Function: true

Allow Copy: true

Allow Analysis: true

Allow Compute TiePoints: false

Supports Statistics: true

Supports Advanced Queries: true

Use StandardizedQueries: true

Raster Type Infos:

Has Raster Attribute Table: false

Edit Fields Info: null

Ownership Based AccessControl For Rasters: null

Child Resources: Info Statistics Key Properties Legend Raster Function Infos

Supported Operations: Export Image Query Identify Download Rasters Measure Compute Histograms Compute Statistics Histograms Get Samples Compute Class Statistics Query Boundary Compute Pixel Location Compute Angles Validate Project Calculate Volume