Review of the OpenGeoportal
One of the most robust data portals is The Open Geoportal (OGP). It is a collaboratively developed, open source, federated web application framework to rapidly discover, preview and retrieve geospatial data from multiple curated repositories. The Open Geoportal Federation is a community of geospatial professionals, developers, information architects, librarians, metadata specialists and enthusiasts working together to make geospatial data and maps available on the web and contribute to global spatial data infrastructure. Patrick Florance at Tufts University and others have been diligently working to make this resource one that will be valued and useful for the GIS community for years to come. The project’s code repository is hosted on github. Documentation can be found here. To search the repository, you can enter information using the “where” and/or “what” search fields or zoom in on a location using the map,
Like any large data depository, this one takes some getting used to–but I found it to be straightforward: You enter where you are interested in searching, and what you are interested in searching for. Where and What: It doesn’t get much more straightforward than that. The only thing I could not get to work was the “Help” link on the page. After selecting and viewing your data on the map, you add it to a Cart. The Cart acts like something you would see on Amazon, and you can add to it and delete from it as you are searching, which I found to be quite convenient. Another nice touch is that you can adjust the symbology of the data that you are examining on the map before you download it. Even better, you can stream web services directly to your desktop, web, or mobile applications from the Cart. After you have made your selections, you access your Cart, whereupon you are presented with download options. If a layer is restricting by licensing agreement, you can add them to the cart but you must log in to preview or download restricted layers. Spending time with the OpenGeoportal will be well worth it given its ease of use, but moreso for the thousands of international data layers accessible here.
Additional tools that the OpenGeoPortal community is in the process of building include a Harvester–an open source web application that provides the automation of customized harvesting from partner metadata nodes and XML metadata files within a web or local directory. Also in progress is a Metadata Toolkit–a publicly available website that provides tools to easily create guided, geospatial metadata, and a Dashboard to analyze and visualize massive spatial data collections.