Best Practices: Integration of OpenTopography DEM data

with UIUC Viewshed tool

SDSC OT team

Outline• OpenTopography– Overview– OT Architecture

• Test Example– LiDAR Point Cloud Data Access and Processing– Viewshed Analysis

• Integration Process– Security Service– Catalogue Service– Workflow Scenario

OpenTopography Facility

• NSF Facility funded via EAR IF and OCI• Increase the amount of science-oriented

LiDAR available online• Enhanced web-based processing capabilities,

with a focus on computationally intensive tasks (leveraging SDSC resources).

• Community support: Software tools, tutorials, short courses, Workshops

OT SOA Architecture

OGC Catalogue Interface

CSW Server

Metadata Management

Server

Teton Conservation District, Wyoming Lidar

User Interface to access data

User Interface for the simulation

Visualization for results

Opal Server(Web Service)

CyberGIS Gateway

Token Based Identity Server

Create the Token

Verify the Token

Invoke the

Service

with Token

Opal toolkit with CyberGIS Security APIs

UIUC

UIUC

SDSC

Metadata Service for OT datasets• CyberGIS gateway enhances the capabilities to

store, manage, and use metadata.– Applications use the metadata model and APIs to

manage data resources.• OGC Standard Catalogue Service• Metadata model– Metadata schema : ISO 19139

• CSW (Catalogue Service for the Web) service APIs enable users to publish, browse, and search for the specific metadata using CSW protocol.– Support HTTP binding

The Workflow Scenario

Metadata Service

OT Facility

Viewshed App

Count Service

Data Access Service

Data Processing Service

Opal Web Services

Outputs:points.laspoints.lazpoints.tar.gz

Outputs:Output.min.grid, asc, geotiffOutput.max.grid, asc, geotiffOutput.mean.grid, asc, geotiffOutput..den.grid, asc, geotiffOutput.idw.grid, asc, geotiffdems.tar.gz

150Million ?