1a working with imagery in arcgis10

8/13/2019 1A Working With Imagery in ArcGIS10

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Working with Imagery in ArcGIS 10

Jenni fer Kuntz

http://www.gislis.org/2011symposium/Presentations/1A_Working_with_Imagery_in_ArcGIS10.pdf


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Overview of Presentation

Imagery Overview

Display Looks Great, Draws Quickly

- Image Analysis Window

- Acceleration

Process

- Image Analysis Window (part 2)

- Data Extraction

Manage Serve


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What is imagery in ArcGIS?

Imagery is raster data

- Aerial photography

- Satellite imagery

- Thermal imagery- Digital elevation models

- Scanned maps

- Land classification

- Surfaces created

from analysis


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Adding Imagery and Raster Data

File on disk

Geodatabase

Mosaic dataset

Stored like a raster catalog

With more capabilities

Metadata is stored in attributes

User experience like a raster dataset


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Adding Imagery and Raster Data

ArcGIS Online Map Service

Image Service WCS / WMS Service


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Raster Datasets - Properties

Unstretched:

Min: 24Max: 241

Stretched:

Min: 0Max: 255

Pyramids

- Reduced resolution copies of the source

- Improve display performance

- Support three resample methods

- Can be compressed (new)

set in GeoProcessing environment

Statistics

- Enhance visual display

Build Pyramids and Statistics tool (new)

Nearest

neighbor

Bilinear

interpolation

Cubic

convolution

Factor of 2


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Display


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Displaying Raster Data

Renderers

- Display your data with a renderer that makes your data

look good

Image Analysis window

- Common capabilities in one easy to access location


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Stretched renderer

Often used for elevation, satellite and aerial imagery

Default: when raster has more than 25 unique values

- Stretches values along a color ramp


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Stretched renderer

NEW at ArcGIS 10

Percent clip stretch

Advanced labeling


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RGB renderer

Often used for satellite imagery and aerial photos

Default: Raster has 3 or more bands

- Displays each band through a different color (Red, Green,

and Blue)


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Unique Values renderer

Often used for land use and scanned maps

Default: Raster has fewer than 25 unique values

- Uses random colors for individual values


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Unique Values renderer

NEW at ArcGIS 10

Create a custom CLR file


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Colormap renderer

Often used for land use and soil maps for

consistency

Default: Colormap is present

- Uses pre-chosen colors for individual values

6 =

1 = = 255 , 255 , 50= 0 , 0 , 175

3 = = 255 , 175 , 204 = = 135 , 90 , 0

5 = = 120 , 215 , 0= 0 , 100 , 157 = = 100, 220 , 255

2 =


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Classified renderer

Often used for grouping data values

Not a default renderer; can be used for single band

data

Places ranges of pixels into separate categories


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Many rendering and processing tools to

make your imagery work easier and

faster

You are able to change the followingdisplay parameters:

- effects tools

- symbology tools (gamma level, DRA, stretch,

etc)

- choose the resampling method- accelerate raster


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Raster Display


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Processing and Analyzing


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Processing raster data in ArcGIS

Combining bands

Clipping

Mosaicking

Pansharpening

Orthorectifying


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Combining Bands

Combine many images into a multi-band raster

Input bands can be from a single or multiple band

raster dataset

Composite with geoprocessing

tool or Image Analysis window

Composite Bands


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Clipping

Clip a portion of raster to fit your study area

Clip with geoprocessing tools or with Export Data

dialog window

Clip on-the-fly with Image Analysis window- Also able to mask (instead of clip)

Clip


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Mosaicking

Combine two more adjacent and overlapping rasters

together

Many mosaic geoprocessing tools:- Workspace to raster dataset

- Raster catalog to raster dataset

Mosaicking on-the-fly

- Mosaic button on the Image Analysis window

- Mosaic dataset (virtual mosaic)


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Pansharpening

Fuse a low resolution RGB image with a high

resolution panchromatic image

- Output is a high resolution color image

Geoprocessing tool, raster symbology tab, or ImageAnalysis window


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Orthorectify

Display an image with more accuracy

- Requires an image with sensor model and an elevation

source

Geoprocessing tool, raster display tab, or Image

Analysis window


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Clip Export data

Composite

bands

NDVI

Colormap to RGB

Difference

Pan-sharpening

Orthorectify

Mask

Shaded relief

Mosaic

Filter


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Image Classification

Spatial Analyst Extension

Extract classes from multiband raster imagery

Supervised or unsupervised

Image Classification toolbar


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Raster Analysis


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Imagery Management Challenges

Many sources

High resolution and large volume

Requirements:

- Store efficiently

- Easy to search

- Fast to process- Accessible


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Licensing

Mosaic Dataset

- View: ArcView license

- Create / edit: ArcInfo/ArcEditor license

- Serve: ArcGIS server + Image extension license

Raster Dataset

- View: ArcView license

- Create / edit: ArcInfo/ArcEditor license

- Serve: ArcGIS server


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Raster Datasets Recommendations

Use it as is

- Especially for compressed formats

Better performance- Convert to tiled TIFF using the CopyRaster tool

- JPEG compressed TIFF if lossy compression is allowed

- File Geodatabase raster dataset is also a comparable

format


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Managing Imagery Collections

Solution in 9.3 is raster catalog

- image service definition

Solution in 10 is mosaic dataset


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Raster Catalogs

A data model for managing a collection of images in

9.3

- Stores footprints and rasters in a table

- Managed/unmanaged

Uses- Catalog images and maintain overlaps

- Search based on attributes and location

- Access selected members

- Display footprint/pixel view

Limitations

- Do not support sensor data and metadata

- No overview

- Cant be served by ArcGIS server


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Mosaic Datasets - New Geodatabase Data Model

Manage and serve collection of images

- Supported in SDE/FGDB/PGDB

- Does not load source pixels into geodatabase,

instead references imagery

Manage data with an internal raster catalog

Displays like a raster dataset

On-the-fly image processing

Mosaic

Dataset


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Mosaic Dataset rendering

Footprint view

- View the minimum bounding rectangle for each raster


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Mosaic Dataset rendering

Rendering pixels similar to a raster dataset

- Level of detail like scale dependency

- Overviews like pyramids

1 : 100 000

1 : 25 000


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Mosaic Dataset Storage Catalog Table

A special raster catalog

- Shape field stores the footprints- Raster field stores raster dataset information

Function raster datasets

- Contains functions and input of the functions

- Defined by raster type and populated when rasters are

added

MinPS and MaxPS define the visible ranges of the

rasters

OID Shape Raster Name LowPS HighPS MinPS MaxPS Category

1 Polygon P01.met 10 30 0 90 Primary


5 Polygon filename1.tif 90 90 90 270 Overviews


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Mosaic Dataset Mosaic Rules

Control which raster/pixels to display

Mosaic method to sort the rasters

- Closest to center (default)

- By attribute

- Closest to nadir

- North west

- Seamline

Mosaic operator to resolve the overlaps

- First/Min/Max/Mean/Blend

Closest to the center

By attribute: cloud cover


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Mosaic dataset: on-the-fly processing

Imagery processed as it is accessed

Can create multiple products from one source

Processing

- Image enhancement

- Combine bands- Color correction

- Orthorectification

- Pan-sharpen

- Shaded relief, hillshade

Define processing functions

- On each raster dataset

- On a mosaic dataset


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Mosaic Datasets - Advantages

StorageEliminates redundancy

Preserves informationOverlapping Imagery

MaintenanceStreamlines image updates

Image QualityReduces resampling

ScalableCatalog large image collections

Sensor supportSupport multiple sensors

Seamless Displayat all scales

Processing TimeReduces processing

MetadataMaintains valuable information

Disparate DatasetsManages large NoData areas


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Data Management Recommendations

Use your existing data model if they continue to meet

your existing application requirements

Use the mosaic dataset for new applications

Migrate to the mosaic dataset to take advantages of

its new features


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Mosaic Dataset Usage

A composite layer of

- Boundary/Footprint/Image

Use as a catalog

- Search images- View metadata

- Add selected images to Map

- Time aware

Use as a raster dataset

- Display like a raster layer

- Export a raster dataset

- Use as an input to geoprocessing tool

Serve as an image service


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Using Mosaic Datasets


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Build a Mosaic Dataset

In ArcCatalog

Mosaic dataset toolset

Automate with model and python

Typical workflow

- Create a mosaic dataset

- Add rasters

- Calculate cell size range

-Build boundary

- Build overviews (optional)

- Edit properties (optional)


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Build a Mosaic Dataset - Create

Create table schema and define pixel properties

Spatial reference (required)

- Used in footprints and overviews- Define a proper one

- Datum consideration

Number of bands

- Taken from the first added raster

Pixel type

- Taken from the first added raster


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Build a Mosaic Dataset Add Rasters

Use Add Rasters to Mosaic Datasettool

Choose a raster type

- Define the format to crawl

- Metadata to read and fields to create

- Processes to apply

Support many raster types

- Raster Dataset/NITF/CADRG/etc.

- QB/IKONOS/GeoEYE/WorldView/etc

- Web Services

- Table/Image Service Definition


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Build a Mosaic Dataset Overviews

Resampled rasters

- Multiple levels

- Multiple tiles for each level

Seamless image display

Overview: 180m

(range: 180-1800)

Sources: 20m

(range: 0-20)

Overviews: 60m

(range:60-180)

PS=100


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Build a Mosaic Dataset Overviews (Cont)

Build Overviews tool

- Generate overview images

Define Overviews tool

- Redefine the default parameters

Optionally add an external raster as overview

OID Shape Raster Name LowPS HighPS MinPS MaxPS Category





Default overview parameters:TIFF format with JPEG

Size is 5120x5120

Factor of 3

Overview location


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Building a Mosaic Dataset Managing Background

Footprint

- Build Footprint tool

- Edit using Editor

- Import using Import Mosaic Dataset

Geometry tool

Define NoData

- Set NoData based on a value

- Set NoData based on a range

Use footprint

Use NoData


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Building a Mosaic Dataset Update

Add new rasters

- Use Add Raster tool

- Use Synchronize Mosaic Dataset

tool

Remove Rasters

- Use Remove Rasters from Mosaic

Dataset tool

Sources rasters are changed

- Changes in geometric/metadata/etc.

- Update with Synchronize Mosaic

Dataset tool


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Mosaic Dataset Advanced Mosaicking

Color correction

- Balance to a color surface

- Balance to an existing target

- Support excluded area

- Color Correction window

Seamline

- Build Seamline tool

- Modify seamline using Editor

- Import seamline feature class

Before

After


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Mosaic Dataset Editing Raster Functions

Process image on-the-fly

- Image enhancement

- Orthorectification, Pan-

sharpen

- Shaded relief, hillshade, etc

Add at mosaic dataset level

Add at raster level

- Apply to the raster


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Referenced Mosaic Dataset

References an external mosaic dataset or rastercatalog

- Supported in GDB and file (.amd)

- Catalog table is not editable

Created by specifying

- Definition query

- Area of interest

Provides multiple views of the source mosaic dataset

Prevents editing of the source mosaic dataset

Where Sensor = Landsat

and Cloud


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Image Management Patterns

Create mosaic datasets with data ofsimilar type

Elevation

Ortho images of same date

Imagery with similar sensor,

number of bands, and bit depth

QuickBird/IKONOS

Landsat 5 or 7

Create referenced mosaic datasetsto publish

Mosaic Dataset to

manage data

Reference

Mosaic Dataset

to publish


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Build Mosaic Datasets


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Serve


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Main ways to serve imagery

Image service

- Image or raster data made available by a server to a

client application

Map service

- Published map document containing an image layer

Other

- Globe service, mobile service, geodata service


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Image Service versus Map Service

Image service Map service

Serves raster data directly Serves a map document

containing raster or vector

data

Image service layer properties

can be altered by client

Compression

Rendering

Band combinations

Client views map service as it

was designed

Client cannot change layer

properties

Can be saved as a layer and

used as a data source

Can build cache


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What can you do with an image service?

Use it as an image (visual analysis)

Use it as raster data (pixel analysis)

Access it as a catalog (mosaic dataset)


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Image service source data

Data sources

- Raster datasets

- Mosaic datasets new

- Requires ArcGIS Server Image Extension

- Raster or mosaic layers

- To control rendering

- Preset some layer properties

- Predefined query


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Publishing an image service

Same process as publishing any service with ArcGIS

Server

- via ArcCatalog

- via Server Manager

Properties unique to image services

- Capabilities

- Parameters

Some capabilities are specific to the data


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Image Service Capabilities

Limits what operations users can do with your Web service

Image Allows the image to be displayed(Absorbed the Mosaic operation in 9.3x)

Metadata Allows the client to see metadata for the imageservice and for each raster in a mosaic dataset

Catalog Allows the client to open the table of a mosaicdataset when it is served

Download Allows rasters to be downloaded when serving amosaic dataset

Pixels Allows the API developer to access the pixel blocksof the individual rasters in a mosaic dataset


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Image Service Parameters

Control the image data

Imagenew, Catalognew, Downloadnew, and Output

Parameters depend on the input for the image

service

Some can be altered by the server administrator

Server administrator cannot exceed limitations for

some of the parameters- Such as: allowed mosaic methods, the maximum

number of rasters per mosaic


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How can you access an image service?

ArcGIS Desktop

ArcGIS Explorer

Web APIs (Silverlight, Flex, JavaScript)

ArcGIS.com

REST, SOAP

WMS, WCS, KML

3rd Party Applications


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Serving and Accessing Image Services


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Resources


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Want to Learn More?

Video.esri.com

- Using Imagery and Raster Data in ArcGIS

- What's New in Imagery and Raster at ArcGIS 10

Training.esri.com- Recorded Training Seminars

- Visualizing and Analyzing Imagery with ArcGIS 10

- Managing Imagery with ArcGIS 10

- Instructor-Led Training

- Managing Imagery Using ArcGIS
http://video.esri.com/watch/76/using-imagery-and-raster-data-in-arcgishttp://video.esri.com/watch/69/whats-new-in-imagery-and-raster-at-arcgis-10http://training.esri.com/acb2000/showdetl.cfm?DID=6&Product_ID=979http://training.esri.com/acb2000/showdetl.cfm?DID=6&Product_ID=970http://training.esri.com/gateway/index.cfm?fa=catalog.courseDetail&CourseID=50121640_10.xhttp://training.esri.com/gateway/index.cfm?fa=catalog.courseDetail&CourseID=50121640_10.xhttp://training.esri.com/gateway/index.cfm?fa=catalog.courseDetail&CourseID=50121640_10.xhttp://training.esri.com/acb2000/showdetl.cfm?DID=6&Product_ID=970http://training.esri.com/acb2000/showdetl.cfm?DID=6&Product_ID=970http://training.esri.com/acb2000/showdetl.cfm?DID=6&Product_ID=970http://training.esri.com/acb2000/showdetl.cfm?DID=6&Product_ID=970http://training.esri.com/acb2000/showdetl.cfm?DID=6&Product_ID=979http://training.esri.com/acb2000/showdetl.cfm?DID=6&Product_ID=979http://training.esri.com/acb2000/showdetl.cfm?DID=6&Product_ID=979http://training.esri.com/acb2000/showdetl.cfm?DID=6&Product_ID=979http://video.esri.com/watch/69/whats-new-in-imagery-and-raster-at-arcgis-10http://video.esri.com/watch/69/whats-new-in-imagery-and-raster-at-arcgis-10http://video.esri.com/watch/69/whats-new-in-imagery-and-raster-at-arcgis-10http://video.esri.com/watch/69/whats-new-in-imagery-and-raster-at-arcgis-10http://video.esri.com/watch/76/using-imagery-and-raster-data-in-arcgishttp://video.esri.com/watch/76/using-imagery-and-raster-data-in-arcgis


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Resources

Resources.esri.com

- Blog (RSS feed)

- Samples

- Videos

- Forums

- More


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