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Project Ideas for Google Summer of Code at 52°North 2018

Main Page: GSoC2018

The is the ideas page for the Google Summer of Code 2018. If you are an interested student please don't hesitate to contact mentors directly or discuss your own ideas on the mailing lists.

To add your idea, please use the project template at the end of the page or add a minimalistic sentence in the "coarse ideas" list - but add your signature in any case. Thanks!

Information for Students

General information: GSoCForStudents

52°North is an open organisation with several "communities" on specific topics. The list of ideas below was created by the community leaders and code managers of different projects organized within these communities. The "Draft Ideas" section contains ideas still under discussion between mentors and org admins, or incomplete ideas, so please get in touch before starting the code challenge.

Beyond our ideas, we welcome your ideas for projects related to our communities and encourage you to get in touch with the communities on the respective mailing lists to discuss your own project ideas.

How do I choose a project?

Some of the software projects are available pre-built on the OSGeo Live demo, including project overviews and tutorials where you can try everything out. Download the ISO from If you have not found an idea that interests you on this ideas page, there are other organisations with great topics on geospatial technologies, and everything related to "geo" really is the best in our opinion. So check out the ideas pages of like minded projects: OSGeo, OpenStreetMap.

Challenge yourself with one or more of the coding challenges - you will best realize if a software interests you when you have some hands-on experience with it. And that is the most important part: you must really find the project interesting.

Ready ideas

Rich Data Interface for Copernicus Data

Explanation: Copernicus is a European Earth observation programme with the goal “to provide accurate, timely and easily accessible information to improve the management of the environment, understand and mitigate the effects of climate change and ensure civil security” (ESA 2015). Within Copernicus, a series of new satellite missions will be executed to gather new satellite data. The first mission acquiring radar data, called Sentinel-1, and the second mission gathering multi-spectral high-resolution data have already been launched.

The Sentinels Scientific DataHub is one of the central points, which provides free and open access to Sentinel-1 and Sentinel-2 user products. However, this infrastructure only releases up to Level-1C products to the users (see here). In order to derive higher-level information products (e.g. Level-2A), the data needs to be processed on the user side, e.g. by using segmentation algorithms. In former times, this workflow included downloading the data, pre-processing it by selecting the spatial and/or temporal extent, and then running the actual segmentation process.

For the processing of sentinel data, there exist SNAP, which is a common toolbox consisting of a rich set of visualization, analysis, and processing tools for the exploitation of Sentinel data. In addition, SNAP has a build-in graph processing framework (GPF) that enables the creation of user-defined processing chains.

Aim of this project is to make use of these processing facilities and to provide a rich data interface for deriving new information products (Level-2) from Sentinel data. Therefore, an OGC Web Processing Service that makes use of the SNAP toolbox needs to be implemented. The WPS should independently download the data from any data infrastructure providing Sentinel data (e.g. scihub, AWS) and should be able to apply user-defined function chains based on SNAP’s built-in GFP framework.

Required skills: Java software development, knowledge of processing libraries, e.g. GeoTools, and tools for data transformation, e.g. SNAP and GDAL, basic knowledge about remote sensing and related information.

Expected results: An implemented Web Processing Service that provides a Rich Data Interface for Copernicus data. The WPS should be able to defined processed based on SNAP’s built-in GFP framework. Furthermore, the WPS should offer at least two different ready-to-use processes, e.g. segmentation process and a process for deriving an index (e.g. NDVI).

Code Challenge: Checkout the sources of the latest version of the 52N WPS and implement an algorithm based on SNAP (e.g. NDVI index) that provides data from copernicus (e.g. Sentinel 1 or 2 data) for a specific bounding box, i.e. that process has as input parameter a bounding box and returns Sentinel data as output.

Community and Code License: Geoprocessing/Geostatistics, GPL v2

Mentor: Arne de Wall (, Benjamin Pross (

WPS 2.0 support for the WPS Client for ArcGIS

Explanation: The Web Processing Service (WPS) Client for ArcGIS was first released in 2013. It was developed in Java by Benjamin Pross together with Alber Sanchez, who received the "Student of the Year" award from the Institute for Geoinformatics in its role as ESRI Development Center (EDC). The support of the open WPS interface standard, version 1.0.0 unlocks a wide range of web-based geoprocessing functionality to ArcGIS users. The offered functionality covers simple tasks like buffering up to complex environmental models. The WPS is used by organizations like the USGS or CSIRO. Currently, the recent WPS standard version 2.0 is not supported by the client. This project is supposed to remedy this.

Further reading: WPS Client for ArcGIS on GitHub, WPS Java Client library on GitHub, WPS 2.0 Interface Standard

Required skills: Java software development, optional: experience with ArcObjects, experience with OGC Web Services.

Required software: ArcGIS for Desktop (We are currently trying to figure out the best way to get you a license.)

Expected results: The WPS Client for ArcGIS reliably works with WPS 1.0.0 and 2.0 servers. The basis for further interfaces like WPS REST should be laid out.

Code Challenge: Build a simple Java program that can connect to WPS 1.0.0 and 2.0 servers and that lists the available processes. Present an idea (e.g. UML diagram) of the necessary abstraction layer. Use XMLBeans or streaming de-/encoder for parsing/generating the XML (the latter is more advanced, have a look at javaPS for ideas).

Community and Code License: Geoprocessing Community, Apache Software License, Version 2

Mentor: Benjamin Pross (

.NET WPS Client for ArcGIS Pro

Explanation: The Web Processing Service (WPS) Client for ArcGIS written in Java (see project idea above) was first released in 2013. However, the support for Java was dropped in the new ArcGIS Pro software. So a new client is needed written in .NET, to be ready for the future. Some concepts from the Java-based can be taken over, while others need to be updated.

Further reading: Java-based WPS Client for ArcGIS on GitHub, ArcGIS Pro SDK Community Samples WPS 2.0 Interface Standard

Required skills: .NET software development, optional: experience with ArcObjects .NET, experience with OGC Web Services.

Required software: ArcGIS Pro, (We are currently trying to figure out the best way to get you a license. Check here for a free trial: ArcGIS Pro Free Trial)

Expected results: The WPS Client for ArcGIS Pro reliably works with WPS 1.0.0 and 2.0 servers. The basis for further interfaces like WPS REST should be laid out.

Code Challenge: Create a basic project structure for the client. It should feature a simple GUI, where you can select a Web Processing Service by URL. Methods for sending a GetCapabilities -request via KVP should be implemented and the basic service capabilities (e.g. tile and processes) should be displayed.

Community and Code License: Geoprocessing Community, Apache Software License, Version 2

Mentor: Benjamin Pross (

Combining Helgoland with Shiny and R

Explanation: Helgoland is a product from of the 52°North software suite acting as a web-based fronted to an OGC sensor observation service (SOS). As such, Helgoland comprises different views and selection operations on the sensor data stored in the SOS. This includes a map view/selection, list selection and time series plots and table views. Shiny Apps can bundle a lot of R's analysis capabilieties in handy web applications. The aim of this projet is to merge these two tools to add direct analysis capabilities to the Helgoland SOS viewer.

Required skills: Java Script; R, i.e. Shiny extensions

Expected results: a full feature Shiny integration with 52°North's Helgoland SOS viewer

Code challenge: Providing a shiny application interacting with some SOS instance and performing a set of analysis tasks where the time series selection is based on the Helgoland client.

Community and Code License: Spatio-Temporal Data Science Community, Apache Software License, Version 2

Mentors: Ben Gräler (, Jan Schulte (

Plain GPS-based Recording for enviroCar

Explanation: enviroCar is an open platform for collecting and analyzing car driven tracks. The collected tracks consist of GPS positions enriched with additional raw sensor data as well as derived information (e.g. CO2 emission and fuel consumption) by utilizing the inertial diagnostic capabilities of vehicles. This raw sensor data is collected by the use of the so-called On-Board-Diagnostics systems of vehicles.

The current recording procedure of the enviroCar Android app heavily relies on the connection to an OBD-II adapter. Thus, a track only gets recorded when a stable bluetooth connection to an OBD-II device exists. However, trajectory data without additional raw sensor data of cars is still a very valuable source of information for further analysis (e.g. traffic flow).

Aim of this project is to implement OBD-less recording of tracks in the current enviroCar Android application. On the one hand this requires a proper integration of this specific recording style into the application logic. As a major challenge in this part is to develop and evaluate strategies on how to make sure that the app is recording a track of a car (e.g. activity recognition). On the other hand, the developments need to be visually embedded into the GUI of enviroCar.

Required skills: Android software development, knowledge of modern development paradigms and frameworks for Android (RxJava, Dagger, ActiveAndroid, Otto, etc.), good command of UX development for Android, some experiences with activity recognition libraries of google (if these are applicable)

Expected results: An additional recording mechanism for enviroCar tracks based on plain GPS. A proper integration into the GUI of the app following novel UX design guidelines. Further strategies for automatic recording (e.g. based on Activity Recognition, see Google Play Services [])

Code Challenge: Checkout the sources for the enviroCar Android app and integrate a routine for plain GPS-based recording of tracks. This also includes a proper integration in the GUI of the enviroCar app. (TBD)

Mentor: Arne de Wall (, Christoph Stasch (

Draft Ideas

Coarse ideas and general goals

  • full streaming from database (via SOS+proxy or via TS-API) to JavaScript client
  • try to combine project requirements (= mentor effort provided) with motivating (fun, interesting) projcts -- ARE via DanielNuest - 2014-10-02
  • Usage statistics and performance evaluation of WPS, SOS and Timeseries API using the ELK stack (comprises new logging configuration, instructions, logging statements to capture all required information) -- DanielNuest - 2015-02-10
  • IOs version of enviroCar app
  • enviroCar website
  • PhoneGap für JS client
  • SOS.js for SOS 2.0 based on ows.js
  • Access control for Sensor Web REST-API
  • WPS client library in C#
  • Admin UI for javaPS
  • WPS Docker backend

Project Template

Please copy and paste to the drafts section above and get in touch with the org admins - leave this template intact.

<concise project title>

Explanation: <Shortly describe the idea and classify as specifically as possible including the required skill level, for example "tricky project, requires in-depth knowledge of database configuration" or "easier project, good for student with limited Java experience". Clarity and detail are highly desirable in the idea description.>

Expected results: <add here>

Code challenge: <add here a short task for an interested student to demonstrate the capabilities with the used tools/producs, e.g. deploying the web server and changing behaviour of feature X.>

Community and Code License: <if applicable>

Mentors: <full name and contact details>

Topic revision: r8 - 11 Jan 2018 10:39:07, ArneDeWall
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