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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 M etadata,
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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 • GeoNode • Free 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 JPEG PNG Zipped Shapefile GML 2.0 EXCEL CSV KML GeoJSON KML TILES
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