Imagery Management in ArcGIS
I Imagery Management M t in i ArcGIS A GIS Kevin Armstrong
Imagery Management
Elements of a Complete GIS
•
Management -
•
Dissemination -
•
Accessibility to data, information and knowledge
Visualization -
•
Storing, Organizing and Structuring
Interpretability and human understanding
Analysis -
Gain knowledge to make informed decisions
ArcGIS – Maximizing the Value of Imagery
•
•
Providing Image Accessibility: -
Timely
-
Quicklyy
-
Accurately
-
Collectively
Exploiting Rich Information Content: -
Resolution
-
Temporal change
-
Spectral range
-
Dynamic y range g
I Imagery Management M t
ArcGIS – For Image Data Management
•
Workstation User -
•
•
What do I have? How can I easily work with it?”
Organizations with collections of processed imagery -
How do I serve all our ortho images?
-
How can I serve my elevation data to multiple users?
Enterprises collecting new imagery - How do I process and serve imagery that we acquire? Quickly catalog all imagery and make it accessible in the required form
Forms of Imagery
•
Ortho Images -
Pre--processed, mosaicked tiles Pre
•
Image Strips
•
Processed Rasters
•
•
-
Elevation models
-
Analysis results
-
Thematic maps
Simple Mgmt. Primarily as Background Data is procured from a source
Advanced Mgmt.
Scenes -
From satellites
Primarily for Analysis or further processing
-
Georeferenced
Data is acquired
Sensor Images g -
Raw / minimal prepre-processing
Each can exist in multiple formats
Mosaic Dataset •
•
•
Quickly Catalog -
All raster datasets
-
Imagery from different sensors
Define -
Metadata
-
Processing to be applied
-
Default viewing rules
Access -
-
As Image -
Dynamic Mosaic
-
Processed on the fly
As Catalog -
Footprints
-
Detailed metadata
What is a Mosaic Dataset?
•
Catalog/Library of -
Imagery and rasters
-
Associated metadata
-
Processing functions to be applied
•
Stored in Geodatabase
•
Authored using ArcGIS G S Desktop
•
Enables -
Dynamic y Mosaicking g
-
On-the-fly processing
Mosaic Dataset – GeoDatabase
•
Stored in GeoDatabase (File or Enterprise)
•
Replacement for:
•
-
Image Service Definitions (used by 9.2 & 9.3 Image Server)
-
Unmanaged Raster Catalogs
Licensing -
Author using ArcGIS Desktop (ArcEditor or ArcInfo)
-
Directly used with ArcGIS Desktop (all levels)
-
Served using ArcGIS Server (Image Extension)
Creating a Mosaic Dataset
Di Dissemination i ti
Dynamic Image Access Image Services - Server based access and processing
ArcGIS Server – Image Services •
Directly from raster dataset
•
User defined: -
Projection
-
Sampling
-
Changeable compression
-
On-the-fly processing
•
Multiple p p products from a single g source
•
Return image or pixel values
•
Export of area of interest
1:M
Dynamic Image Access Image Services - Server based access and processing
ArcGIS Server – Image Extension •
Extends Image Services to serve mosaic datasets
•
Serve large collections of imagery
•
As Image with dynamic mosaicking
•
As Catalog g with selection and q query y
•
Download source pixels with clipping M:M
On-The-Fly On The Fly Processing Creating Multiple Products from a Single Source
•
•
Processes •
Stretch, Extract Bands
•
Clip Mask Clip,
•
Reproject,, Orthorectify, Pan Sharpen Reproject
•
Vegetation Index, Classify
•
Shaded Relief, Slope, Aspect
•
Color Correction
•
…
Applied to •
Individual rasters
•
Compete Mosaic
Utilizing the full image information content
Dynamic Mosaicking Mosaicking Multiple Images On Demand
• Fuse imagery from multiple sources • User control of Mosaic Method • By Date –’Latest’, Latest , ‘Closest Closest to May 2001’ 2001 • By Attribute – ‘Highest Sun Angle’ • By Viewpoint – North, South, East, West • Seamline – Feathered blend
• User Query – ‘Landsat imagery, with no cloud, later than June 2001’ • Set default - Users sees best available imagery g y
Utilizing information from overlapping images
Enhancing Processing Methodologies •
•
Conventional Image Processing Workflows are Linear -
Multiple processes create intermediate results
-
Products created as static mosaic
Mosaic Datasets Enable Transactional Workflows -
Processes applied on demand
-
Products created on demand
On--the On the--fly Processing & Dynamic Mosaicking Resolves Traditional Image Management and Processing Issues
Storage
P Processing i Ti Time
Reduces storage by removing redundancy
Reduces processing
Overlapping Imagery
Multi--resolution Data Multi
Maintain information
t1 t2 t3
No need to sample up or down
t4
Disparate Datasets Large NoData areas
Image g Quality y Reduces resampling
Maintenance Add imagery as required
M i t i M Maintain Metadata t d t Retain valuable information
Dissemination
Vi Visualization li ti Interpretation of imagery
Direct Image Access Workstation Accesses Pixels and Performs Required Processing
ArcGIS Desktop provides direct access •
Raster Datasets -
Nearly all image formats -
•
TIF, IMG, NITF, JPEG2000, ...
Mosaic Datasets -
C ll ti Collections off rasters, t metadata t d t with ith processing i
-
Raster Types - Sensor specific products -
QuickBird, Ikonos, SPOT, Aerial Frame, …
ArcGIS provides direct access to nearly all imagery
Static Image Access Web Optimized Imagery
Map Cache for Imagery •
Provide static background image
•
Most scalable web delivery
•
Example: ArcGIS Online Imagery
•
Created and served using ArcGIS Server
Imagery Management
Elements of a Complete GIS
•
Management -
•
Dissemination -
•
Accessibility to data, information and knowledge
Visualization -
•
Storing, Organizing and Structuring
Interpretability and human understanding
Analysis -
Gain knowledge to make informed decisions
ArcGIS – Maximizing the Value of Imagery
•
•
Providing Image Accessibility: -
Timely
-
Quicklyy
-
Accurately
-
Collectively
Exploiting Rich Information Content: -
Resolution
-
Temporal change
-
Spectral range
-
Dynamic y range g
I Imagery Management M t
ArcGIS – For Image Data Management
•
Workstation User -
•
•
What do I have? How can I easily work with it?”
Organizations with collections of processed imagery -
How do I serve all our ortho images?
-
How can I serve my elevation data to multiple users?
Enterprises collecting new imagery - How do I process and serve imagery that we acquire? Quickly catalog all imagery and make it accessible in the required form
Forms of Imagery
•
Ortho Images -
Pre--processed, mosaicked tiles Pre
•
Image Strips
•
Processed Rasters
•
•
-
Elevation models
-
Analysis results
-
Thematic maps
Simple Mgmt. Primarily as Background Data is procured from a source
Advanced Mgmt.
Scenes -
From satellites
Primarily for Analysis or further processing
-
Georeferenced
Data is acquired
Sensor Images g -
Raw / minimal prepre-processing
Each can exist in multiple formats
Mosaic Dataset •
•
•
Quickly Catalog -
All raster datasets
-
Imagery from different sensors
Define -
Metadata
-
Processing to be applied
-
Default viewing rules
Access -
-
As Image -
Dynamic Mosaic
-
Processed on the fly
As Catalog -
Footprints
-
Detailed metadata
What is a Mosaic Dataset?
•
Catalog/Library of -
Imagery and rasters
-
Associated metadata
-
Processing functions to be applied
•
Stored in Geodatabase
•
Authored using ArcGIS G S Desktop
•
Enables -
Dynamic y Mosaicking g
-
On-the-fly processing
Mosaic Dataset – GeoDatabase
•
Stored in GeoDatabase (File or Enterprise)
•
Replacement for:
•
-
Image Service Definitions (used by 9.2 & 9.3 Image Server)
-
Unmanaged Raster Catalogs
Licensing -
Author using ArcGIS Desktop (ArcEditor or ArcInfo)
-
Directly used with ArcGIS Desktop (all levels)
-
Served using ArcGIS Server (Image Extension)
Creating a Mosaic Dataset
Di Dissemination i ti
Dynamic Image Access Image Services - Server based access and processing
ArcGIS Server – Image Services •
Directly from raster dataset
•
User defined: -
Projection
-
Sampling
-
Changeable compression
-
On-the-fly processing
•
Multiple p p products from a single g source
•
Return image or pixel values
•
Export of area of interest
1:M
Dynamic Image Access Image Services - Server based access and processing
ArcGIS Server – Image Extension •
Extends Image Services to serve mosaic datasets
•
Serve large collections of imagery
•
As Image with dynamic mosaicking
•
As Catalog g with selection and q query y
•
Download source pixels with clipping M:M
On-The-Fly On The Fly Processing Creating Multiple Products from a Single Source
•
•
Processes •
Stretch, Extract Bands
•
Clip Mask Clip,
•
Reproject,, Orthorectify, Pan Sharpen Reproject
•
Vegetation Index, Classify
•
Shaded Relief, Slope, Aspect
•
Color Correction
•
…
Applied to •
Individual rasters
•
Compete Mosaic
Utilizing the full image information content
Dynamic Mosaicking Mosaicking Multiple Images On Demand
• Fuse imagery from multiple sources • User control of Mosaic Method • By Date –’Latest’, Latest , ‘Closest Closest to May 2001’ 2001 • By Attribute – ‘Highest Sun Angle’ • By Viewpoint – North, South, East, West • Seamline – Feathered blend
• User Query – ‘Landsat imagery, with no cloud, later than June 2001’ • Set default - Users sees best available imagery g y
Utilizing information from overlapping images
Enhancing Processing Methodologies •
•
Conventional Image Processing Workflows are Linear -
Multiple processes create intermediate results
-
Products created as static mosaic
Mosaic Datasets Enable Transactional Workflows -
Processes applied on demand
-
Products created on demand
On--the On the--fly Processing & Dynamic Mosaicking Resolves Traditional Image Management and Processing Issues
Storage
P Processing i Ti Time
Reduces storage by removing redundancy
Reduces processing
Overlapping Imagery
Multi--resolution Data Multi
Maintain information
t1 t2 t3
No need to sample up or down
t4
Disparate Datasets Large NoData areas
Image g Quality y Reduces resampling
Maintenance Add imagery as required
M i t i M Maintain Metadata t d t Retain valuable information
Dissemination
Vi Visualization li ti Interpretation of imagery
Direct Image Access Workstation Accesses Pixels and Performs Required Processing
ArcGIS Desktop provides direct access •
Raster Datasets -
Nearly all image formats -
•
TIF, IMG, NITF, JPEG2000, ...
Mosaic Datasets -
C ll ti Collections off rasters, t metadata t d t with ith processing i
-
Raster Types - Sensor specific products -
QuickBird, Ikonos, SPOT, Aerial Frame, …
ArcGIS provides direct access to nearly all imagery
Static Image Access Web Optimized Imagery
Map Cache for Imagery •
Provide static background image
•
Most scalable web delivery
•
Example: ArcGIS Online Imagery
•
Created and served using ArcGIS Server
