Exploring Spatial Data Infrastructure in an Open Source World

Jacqueline Lowe

UNC-Asheville

National Environmental Modeling and Analysis Center

What is a SDI?

SDI is a collaborative framework for various aspects of geospatial data and tools. Storage

Access

Metadata,

Querying, Display of spatial data

Access to spatial data services

Data integrity and organization

Reducing redundancy.

Data Management

Cataloging / Organization

Data Discovery

Metadata

Keywords

Updating

Data Storing

Create, maintain and store spatial data

Shapefiles, excel tables, databases (such as PostGIS), WMS layers

Data Access

Different Users and different formats

Viewing, querying maps

Demonstrating the Use and Concepts of a SDI

GeoNodeFree and Open Source!

Version 2.4

Configured on Ubuntu operating system

Works with GeoServer and PostGIS

Other SDIs, such as GeoNetwork

USE CASE EXAMPLE

Lots of data in different formats, vector and raster

Different scales including National, State, County

Different types of users, some proficient in GIS, others are not

Uploading Layers to Catalog

Different data formats, raster, shapefile, other vector

Control over user permissions

Styling Layers

Not quite as extensive as some other mapping programs (Desktop GIS).

Shapes, add labels, and adjust the look of the points based on attribute values and scale.

Managing Metadata

Keywords are custom “tags”

Categories are based on metadata Standards

Both provide ways of standardizing the way data is accessed and organized

Automated Publishing to GeoServer

You can now access and share WMS layers with Geoserver.

PostGIS Database

Layers are automatically added to PostGIS database

Ability to connect GeoServer to other data sources as well.

Viewing and Creating Maps in Mapviewer

In the Mapviewer, you can add multiple layers, (your own or selected)

Publish and save completed map

Access WMS

Downloading Layers in Different Formats

JPEGPNGZipped ShapefileGML 2.0EXCELCSVKMLGeoJSONKMLTILES

Uploading Documents

Includes PDFs, Spreadsheets, etc.

Documents can be linked to spatial data layers in GeoNode

Some Things to Consider…

Benefits

Limitations

Accessibility

OPEN SOURCE

Questions?

Jacqueline Lowe

jdlowe@unca.edu