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Service Description: Compilation of historical and recent digital elevation models (bare-earth terrain 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 terrain models (DTM) represent the elevations of terrain and surface topography devoid of natural or human objects such as vegetation and buildings. Elevations are referenced to either the CGVD28 HT2.0 (Canadian Geodetic Vertical Datum of 1928, Height Transformation 2.0) 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.
Mosaics/NWTCG_LiDAR_DTM_External_Referenced
Description: Compilation of historical and recent digital elevation models (bare-earth terrain 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 terrain models (DTM) represent the elevations of terrain and surface topography devoid of natural or human objects such as vegetation and buildings. Elevations are referenced to either the CGVD28 HT2.0 (Canadian Geodetic Vertical Datum of 1928, Height Transformation 2.0) 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.
false
Extent:
XMin: -1.51742486347E7
YMin: 8396070.2945
XMax: -1.21040911347E7
YMax: 1.09087217945E7
Spatial Reference: 102100
(3857)
LatestVCSWkid(0)
Initial Extent:
XMin: -1.51742486347E7
YMin: 8396070.2945
XMax: -1.21040911347E7
YMax: 1.09087217945E7
Spatial Reference: 102100
(3857)
LatestVCSWkid(0)
Full Extent:
XMin: -1.51742486347E7
YMin: 8396070.2945
XMax: -1.21040911347E7
YMax: 1.09087217945E7
Spatial Reference: 102100
(3857)
LatestVCSWkid(0)
Time Info:
Start Time Field: FirstDate
End Time Field: LastDate
Time Extent:
[2009/01/01 00:00:00 UTC, 2024/12/31 00:00:00 UTC]
Time Reference:
N/A
Pixel Size X: 0.5
Pixel Size Y: 0.5
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": "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:
Name: Raster Dataset
Description: Supports all ArcGIS Raster Datasets
Help:
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