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LandsatGLSChange/NDVI_Change_1975_2005 (ImageServer)

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Service Description:

This Esri Landsat image service highlights changes to vegetation areas from 1975 to 2005 using the NDVI. NDVI identifies vegetated areas and their condition while compensating for sun angle and some atmospheric influences. The change map is generated by combining NDVI data derived from Landsat imagery for two dates, 1975 and 2005, where R,G,B = 2005 NDVI, 1975 NDVI, 2005 NDVI. Most areas in the image will be grey, indicating no change because each pixel has relatively the same value in each NDVI dataset. Areas that show up green were brighter in 1975 (meaning more vigorous vegetation), while areas that show up in magenta were brighter in 2005 than 1975. Discontinuity of results between Landsat scenes are generally caused by differences in seasonality, such as scenes acquired in the Spring next to ones acquired in the Fall.

Time Enabled: Yes. (Start Time Field: GLS_START_75; End Time Field: GLS_END_75)

Data Source: This image service was compiled from Global Land Survey (GLS) datasets: 1975 and 2005. GLS datasets are created by the United States Geological Survey (USGS) and the National Aeronautics and Space Administration (NASA) using Landsat images. These global minimal-cloud cover, orthorectified Landsat data products support global assessments of land-cover, land cover-change, and ecosystem dynamics such as disturbance and vegetation health.



Name: LandsatGLSChange/NDVI_Change_1975_2005

Description:

This Esri Landsat image service highlights changes to vegetation areas from 1975 to 2005 using the NDVI. NDVI identifies vegetated areas and their condition while compensating for sun angle and some atmospheric influences. The change map is generated by combining NDVI data derived from Landsat imagery for two dates, 1975 and 2005, where R,G,B = 2005 NDVI, 1975 NDVI, 2005 NDVI. Most areas in the image will be grey, indicating no change because each pixel has relatively the same value in each NDVI dataset. Areas that show up green were brighter in 1975 (meaning more vigorous vegetation), while areas that show up in magenta were brighter in 2005 than 1975. Discontinuity of results between Landsat scenes are generally caused by differences in seasonality, such as scenes acquired in the Spring next to ones acquired in the Fall.

Time Enabled: Yes. (Start Time Field: GLS_START_75; End Time Field: GLS_END_75)

Data Source: This image service was compiled from Global Land Survey (GLS) datasets: 1975 and 2005. GLS datasets are created by the United States Geological Survey (USGS) and the National Aeronautics and Space Administration (NASA) using Landsat images. These global minimal-cloud cover, orthorectified Landsat data products support global assessments of land-cover, land cover-change, and ecosystem dynamics such as disturbance and vegetation health.



Single Fused Map Cache: false

Extent: Initial Extent: Full Extent: Time Info: Pixel Size X: 2.694945852358564E-4

Pixel Size Y: 2.694945086202171E-4

Band Count: 3

Pixel Type: U8

RasterFunction Infos: {"name":"None","description":"A No-Op Function.","help":""}, {"name":"DRA","description":"DRA, Dynamic Range Adjustment, is a contrast stretch that only stretches the pixel values within the display extent - does not use all the pixel values in the raster dataset.","help":""}

Mensuration Capabilities: Basic,Base-Top Shadow Height

Has Histograms: false

Has Colormap: false

Min Scale: 0

Max Scale: 0

Copyright Text: United States Geological Survey (USGS), National Aeronautics and Space Administration (NASA), Esri Inc

Service Data Type: esriImageServiceDataTypeProcessed

Min Values: N/A

Max Values: N/A

Mean Values: N/A

Standard Deviation Values: N/A

Object ID Field: OBJECTID

Fields: Raster Attribute Table: false

Default Mosaic Method: ByAttribute

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

SortField: AcquisitionDate

SortValue: 3000/12/12

Mosaic Operator: First

Default Compression Quality: 80

Default Resampling Method: Bilinear

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

Raster Type Infos: Has Raster Attribute Table: false

Edit Fields Info: null

Ownership Based AccessControl For Rasters: null

Child Resources:   Info   Key Properties

Supported Operations:   Export Image   Query   Identify   Measure