GSoC Archive - Page 30 of 36 - Blog

OpenSensorSearch – Final blog post

September 19, 2013 by MohammadYakoub Leave a Comment

Filed Under: GSoC, Sensor Web Tagged With: bootstrap, Guice, Harvest, Jersey, Metadata, Mozilla Rhino, Open Sensor Search, OpenSearch, OSS, OSSUI, Quartz, RemoteCallback, Responsive UI, Sensor Metadata, Spring MVC, user interface

The aim of the OpenSensorSearch project is to provide an implementation of a sensor discovery server with the high performance of a Solr back-end to give users results fast. In addition, we are working on harvesting mechanisms for OpenSensorSearch (OSS) to allow users and developers to write harvesters for their own sensor data sources.

In the previous blog post, we discussed the work done in the first few weeks related to the database back-end and how we used Apache Solr for indexing and fast searching. Today we present the work done in the second half of the project. It focussed on harvesting metadata from other sources and the user interface. I mainly discuss

Javascript harvesting mechanism,
“harvest callback” technique,
user interface implementation with Spring MVC and
general technical details.

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Meet The New 52° North WPS Admin Web Application

September 17, 2013 by KhalidAlqinyah Leave a Comment

Filed Under: Communities, GSoC Tagged With: Administrator, Google Summer of Code, GSoC, Web Processing Service, WPS

On the 17th of June, work started on creating a new web admin application for the 52° North WPS. The project aimed to achieve the following three goals. The first was to make managing, maintaining, and extending the code easier for project developers. This was achieved by having a layered architecture to deal with separate concerns and responsibilities. The second goal was to provide a way for third party developers to integrate their modules to the application with minimum effort. A configuration API was developed to achieve this. The final goal was to improve the usability of the system by creating a new, modern, and flexible user interface.

I have discussed the goals and initial plan in the first blog: New 52° North WPS Admin Web Application, and reported on the progress half way through in the second blog: 52° North WPS Configuration Management Reloaded. In this final blog, I’ll focus on the end result and what has been achieved.

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OpenSensorSearch – Midterm blog

August 2, 2013 by MohammadYakoub Leave a Comment

Filed Under: GSoC, Sensor Web Tagged With: 52°North, 52n, Apache Solr, Cosm, ElasticSearch, ES, GitHub, Open Search, Pachube, Sensor Instance Registry, Sensor Web, SIR, Solr, Xively

Introduction

The aim of the OpenSensorSearch project is to provide a fast implementation of a sensor discovery server with the high performance of a Solr back-end. In addition, we are working on harvesting mechanisms for OpenSensorSearch to allow users to write harvesters for their own sensor data sources.
During this first term, I have had frequent contact with my mentors, twice a week on Monday and Friday. We stick to a Scrum-like methodology and rely heavily on test-driven development. The main considerations and tasks during the first half of the project runtime were:

Testing and extending the existing 52°North Sensor Instance Registry (SIR) implementation: Since the project builds upon the SIR implementation, it must be carefully tested and extended for the OpenSensorSearch implementation.
Providing fast indexing and retrieving: The metadata indexing shall use the data fields supported by Apache Solr for fast indexing and retrieving.
Developing easy and open harvesting mechanisms: The harvesting mechanisms must be both easy and open to make it accessible to wide span of developersmore >

Trajectory Analysis in R – Midterm Post

August 1, 2013 by JinlongYang Leave a Comment

Filed Under: GSoC Tagged With: GSoC, R, spacetime, trajectory

This project aims to develop methods and classes specifically designed for trajectory analysis. Over the past five weeks, I have made progress in three main aspects.

First, I have been learning the basics of developing packages for R and making a transition from an R user (a.k.a. a useR) to an R developer. Second, I wrote a function for converting raw trajectory files into STI objects and eventually into STTDF objects. Third, I wrote an additional function to enable a simple spatial overlay operation between one or more STTDF object(s) and a SpatialPolygons object (from sp package), both at the individual point level, as well as at the trajectory level.more >