Mosaics/LongTermChangeDetection_TasseledCapResult (ImageServer)

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View Footprint In: ArcGIS Online Map Viewer

Service Description: This tiled dataset includes 12 images that cover the entire NWT with an RGB colour composite dataset. The images highlight areas of landscape change over a 35 year period dating from 1984 to 2019. The analysis approach is based on a Tasseled Cap analysis to develop brightness, greenness, and wetness indices for all cloud-free image pixels spanning this period. For each pixel location, regression is applied to determine the linear trend over 35 years for each of the three indices. The composite image of these results illustrates areas of development, vegetation greening, fire, geomorphology and other forms of landscape change that can be interpreted with the use of a colour wheel as a guide. Refer to various documents to reference this colour wheel interpretation guide – including the summary report for this dataset issued by Caslys Consulting Ltd. (Long-Term Landscape Change Detection for NWT) or technical papers issued by lead author Dr. Robert Fraser (NRCan) for various projects (LARCH or ParkSPACE). These results build upon past efforts led by Canada Centre for Earth Observation and Mapping and Parks Canada while being made possible by advances in cloud computing. The relatively seamless dataset across the NWT is based on a sampling of the entire Landsat TM, ETM and OLI archive by selecting only the best clear-sky pixels from each year during the peak greenness of the summer season.

Name: Mosaics/LongTermChangeDetection_TasseledCapResult

Description: This tiled dataset includes 12 images that cover the entire NWT with an RGB colour composite dataset. The images highlight areas of landscape change over a 35 year period dating from 1984 to 2019. The analysis approach is based on a Tasseled Cap analysis to develop brightness, greenness, and wetness indices for all cloud-free image pixels spanning this period. For each pixel location, regression is applied to determine the linear trend over 35 years for each of the three indices. The composite image of these results illustrates areas of development, vegetation greening, fire, geomorphology and other forms of landscape change that can be interpreted with the use of a colour wheel as a guide. Refer to various documents to reference this colour wheel interpretation guide – including the summary report for this dataset issued by Caslys Consulting Ltd. (Long-Term Landscape Change Detection for NWT) or technical papers issued by lead author Dr. Robert Fraser (NRCan) for various projects (LARCH or ParkSPACE). These results build upon past efforts led by Canada Centre for Earth Observation and Mapping and Parks Canada while being made possible by advances in cloud computing. The relatively seamless dataset across the NWT is based on a sampling of the entire Landsat TM, ETM and OLI archive by selecting only the best clear-sky pixels from each year during the peak greenness of the summer season.

Single Fused Map Cache: false

Extent:

Initial Extent:

Full Extent:

Pixel Size X: 25.0

Pixel Size Y: 25.0

Band Count: 3

Pixel Type: U8

RasterFunction Infos: {"rasterFunctionInfos": [{ "name": "None", "description": "A No-Op Function.", "help": "" }]}

Mensuration Capabilities: None

Has Histograms: true

Has Colormap: false

Has Multi Dimensions : false

Rendering Rule:

Min Scale: 0

Max Scale: 0

Copyright Text: NWT Centre for Geomatics

Service Data Type: esriImageServiceDataTypeRGB

Min Values: 0, 0, 0

Max Values: 255, 255, 255

Mean Values: 101.53082897543558, 107.96886212211665, 94.27126691415101

Standard Deviation Values: 97.82359320894547, 74.77152961061078, 88.58047453707391

Object ID Field: OBJECTID

Fields:

OBJECTID ( type: esriFieldTypeOID , alias: OBJECTID )
Name ( type: esriFieldTypeString , alias: Name , length: 200 )
MinPS ( type: esriFieldTypeDouble , alias: MinPS )
MaxPS ( type: esriFieldTypeDouble , alias: MaxPS )
LowPS ( type: esriFieldTypeDouble , alias: LowPS )
HighPS ( type: esriFieldTypeDouble , alias: HighPS )
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 )
CenterX ( type: esriFieldTypeDouble , alias: CenterX )
CenterY ( type: esriFieldTypeDouble , alias: CenterY )
ZOrder ( type: esriFieldTypeInteger , alias: ZOrder )
Shape ( type: esriFieldTypeGeometry , alias: Shape )

Default Mosaic Method: Northwest

Allowed Mosaic Methods: NorthWest,Center,LockRaster,ByAttribute,Nadir,Viewpoint,Seamline,None

SortField:

SortValue: null

Mosaic Operator: First

Default Compression Quality: 75

Default Resampling Method: Nearest

Max Record Count: 1000

Max Image Height: 4100

Max Image Width: 15000

Max Download Image Count: 20

Max Mosaic Image Count: 20

Allow Raster Function: 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 Histograms Key Properties Legend MultiDimensionalInfo rasterFunctionInfos

Supported Operations: Export Image Query Identify Compute Histograms Compute Statistics Histograms Get Samples Compute Class Statistics Query Boundary