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3.1: Offering a GeoTiff dataset with open source


3.1.1 Introduction of use case

3.1.2 Description of use case

3.1.3 Pointer from parts of use case to tutorial sections

3.1.4 Example used to showcase use case

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3.1.1Introduction of use case

GeoServer is an open source software server written in Java that allows users to share and edit geospatial data. Designed for interoperability, it publishes data from any major spatial data source using open standards.

Being a community-driven project, GeoServer is developed, tested, and supported by a diverse group of individuals and organizations from around the world.

GeoServer is the reference implementation of the Open Geospatial Consortium (OGC) Web Feature Service (WFS) and Web Coverage Service (WCS) standards, as well as a high performance certified compliant Web Map Service (WMS). GeoServer forms a core component of the Geospatial Web.

3.1.2 Description of use case

The Open Planning Project (TOPP), a non-profit technology incubator based in New York. TOPP was creating a suite of tools to enable open democracy and to help make government more transparent. The first of these was GeoServer, which came out of a recognition that a suite of tools to enable citizen involvement in government and urban planning would be greatly enhanced by the ability to share spatial data.

The GeoServer founders envisioned a Geospatial Web, analogous to the World Wide Web. With the World Wide Web, one can search for and download text. With the Geospatial Web, one can search for and download spatial data. Data providers would be able to publish their data straight to this web, and users could directly access it, as opposed to the now indirect and cumbersome methods of sharing data that exist today.

Those involved with GeoServer founded the GeoTools project, an open source GIS Java toolkit. Through GeoTools, support for Shapefiles, Oracle databases, ArcSDE integration, and much more was added.

>Around the same time as GeoServer was founded, The OpenGIS Consortium (now the Open Geospatial Consortium) was working on the Web Feature Service standard. It specifies a protocol to make spatial data directly available on the web, using GML (Geographic Markup Language), an interoperable data format. A Web Map Service was also created, a protocol for creating and displaying map images created from spatial data.

Other projects became interrelated. Refractions Research created PostGIS, a free and open spatial database, which enabled GeoServer to connect to a free database. Also, MetaCarta created OpenLayers, an open source browser-based map viewing utility. Together, these tools are all have enhanced the functionality of GeoServer.

GeoServer can now output data to many other spatial data viewers, such as Google Earth, a popular 3-D virtual globe. In addition, GeoServer is currently working directly with Google in order to allow GeoServer data to be searchable on Google Maps. Soon a search for spatial data will be as easy as a Google search for a web page. Thus GeoServer is continuing on its mission to make spatial data more accessible to all.

3.1.3 Pointer from parts of use case to tutorial sections

Point to section 4.2

3.1.4 Example used to showcase use case

To illustrate the functionality of this particular use case, we are going to explain it with two examples. In both case we are going to offer a GeoTIFF product, but we are going to increase the complexity of it by making one of them a mosaic. The data used are remote sensing images from Haiti acquired by GeoEye_1 on the 16 of January of 2010, three days after the tragic earth quake took place.

 

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