content_docu_specific.html

---
title: Specific Topics - SECONDO
description: Documentation for specific SECONDO algebra modules, including Hadoop-Parallel, Distributed2, Raster2/Tile/GIS, and viewer extensions.
last_changed: 2016-09-26
---

<a name="algebras"></a>
<h1>Specific Topics</h1>


<span class="secondo">Secondo</span> can be extended by algebra modules. Such an algebra 
provides some new data types and operators. It can use the
types of other algebras. Operators are directly available 
in the executable language of <span class="secondo">Secondo</span> and partially also in the Optimizer. In this section, we provide
some files describing specific algebra modules:

<h2> Hadoop-Parallel-Algebra </h2>
  

<ul>
  <li> <a href="files/Documentation/Algebras/hadoop/PSUserGuide.pdf" target="_blank" rel="noopener noreferrer">User Guide for Parallel SECONDO</a></li>
  <li> <a href="files/Documentation/Algebras/hadoop/example.pdf" target="_blank" rel="noopener noreferrer">Example: How to Write Parallel Queries in Parallel SECONDO</a></li>
  <li> <a href="files/Documentation/Algebras/hadoop/vmExample.pdf" target="_blank" rel="noopener noreferrer">Example: How to Use the VM Parallel SECONDO</a></li>
  <li> <a href="files/Documentation/Algebras/hadoop/amiExample.pdf" target="_blank" rel="noopener noreferrer">Example: How to Set Up Parallel SECONDO on AWS EC2</a></li>
  <li> <a href="files/Documentation/Algebras/hadoop/pbExample.pdf" target="_blank" rel="noopener noreferrer">Example: How to Use the Parallel BerlinMOD Benchmark</a></li>
</ul>

<h2> Distributed2-Algebra </h2>

<ul>
 <li> <a href="files/Documentation/General/DistributedQueryProcessinginSecondo.pdf" target="_blank" rel="noopener noreferrer">Distributed Query Processing in Secondo</a></li>
</ul>


<h2> Raster2-, Tile-, and GIS-Algebra </h2>

<ul>
 <li> <a href="files/Documentation/Algebras/Tile/Working_With_Raster_Data.pdf" target="_blank" rel="noopener noreferrer">Working With Raster Data</a></li>
 <li> <a href="files/Documentation/Algebras/Tile/Examples_for_GISAlgebra.pdf" target="_blank" rel="noopener noreferrer">Examples for GISAlgebra</a></li>
</ul>


<h2>Viewer-Specific Documentation</h2>

The graphical user interface of <span class="secondo">Secondo</span> can be extended by so-called
viewers able to present different data types. On this page, we provide documents describing 
such viewers. 


<ul>
  <li> <a href="files/Documentation/Viewer/UpdateViewer2.pdf" target="_blank" rel="noopener noreferrer">Manual for the UpdateViewer2 </a>(german only, part of a Bachelor thesis) </li>
</ul>