ArcGIS: A Complete Platform for ImageryShan Shan Lam – Esri China (HK)

Vincent Yeung – Esri China (HK)

General OutlineImagery in ArcGIS

• Why use imagery in a GIS?

• Sources of imagery

• ArcGIS Imagery Information Model

• Sharing Imagery using mosaic

datasets/image services

• Analyzing data with mosaic

datasets/image services

Why use imagery in

GIS?

A friend asked me to check out his farm…

A friend asked me to check out his farm…

A friend asked me to check out his farm…

Imagery Characteristics - Timely

Sources of Imagery

ArcGIS integrates all types, sources, and sensor modelsSources of Imagery

. . . Making Imagery a Fundamental Part of the Systems

LiDAR

Thermal

Panchromatic

Multi-Spectral

RADAR

Full Motion Video (FMV)

Aerial

Satellite

ArcGIS includes many tools for Visualization, Analysis, and Data

Management of imagerySources of Imagery

Classification

Mosaicking

Pan Sharpen

Color Balance

Ortho-Rectification

Change Analysis

3D Measurement

Automatic Alignment

Imagery Information

Model

Raster DatasetArcGIS Imagery Information Model

• The Raster Dataset is the primary information model component which represents a basic image

with basic behavior.

• It’s role is to read and write image storage (pixels) and metadata

• Comprehensive Support

- 1 or N Bands

- 1-64 bits per band

- compressed or uncompressed

- > 80 formats supported

- pyramids (rrd, ovr, internal…)

• Read image files directly – no need to convert

• “It’s what you get if you drag a GeoTIFF into ArcMap.”

Mosaic DatasetArcGIS Imagery Information Model

• The Mosaic Dataset is the primary information model component

which manages massive collections of imagery

• It’s role is to provide…

- an image library for management (cataloging, indexing, metadata, searching,…)

- dynamic, on-the-fly, product generation (mosaicking, processing and analysis)

- a workflow to shorten the time from sensor to use (quickly ingest, dynamic

product immediately available)

• Scalable (1 to millions of images)

• homogeneous or heterogeneous collections (one sensor or a mix)

• Dynamic product generation for visualization or analysis

Vincent Yeung

Creating a Mosaic

Dataset

• Mosaic imagery from multiple tiles

• User can query mosaic

• Year = 2009

Dynamic MosaickingMosaicking Multiple Images On Demand

2005

2007

2009

On-The-Fly Processing

Creating Multiple Products from a Single Source

• Processes

• Extract Bands

• Hill shade, Shaded Relief

• Stretch

• Applied to

• Individual raster

• Complete Mosaic

Vincent Yeung

On-The-Fly

Processing

Sharing Imagery

2 Ways to Serve Imagery

• Directly from individual raster dataset

• From mosaic dataset (requires image

extension)

Image.tif

MosaicDataset

Publish to Server

Publish to Server

Image Extension

Pictures

Pixels

Metadata

Image as a Service

40+ image processing functions

Putting it all together

Raster Types

MosaicDataset

ImageryNativeForm

Points

to original

ImageryRasterFunctions

Harvests Metadata

ArcGISServer

Raster Products

Publishing

Desktop Web Device

ImageService

ArcGISDesktop

Vincent Yeung

Sharing Mosaic

Datasets

Image Analysis

• Image Classification Tools

• Change Detection Workflows

• Geoprocessing Tools

Vincent Yeung

Analysis

More on Mosaic DatasetsResources

• Mosaic Dataset Configuration Scripts

- https://github.com/Esri/mdcs-py

• Image Discovery Application

- https://github.com/Esri/image-discovery-app-js

• Image Management Workflows

- http://resources.arcgis.com/en/communities/imagery/01850000000v000000.htm

• Image Management Guidebook

- http://resources.arcgis.com/en/help/image-management-

workflows/10.1/index.html#/Image_Management/02qr00000002000000/

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