[comment]: # (Set the theme:) [comment]: # (The list of themes is at https://revealjs.com/themes/) [comment]: # (The list of code themes is at https://highlightjs.org/) [comment]: # (Pass optional settings to reveal.js:) [comment]: # (markdown: { smartypants: true }) [comment]: # (plugins:[ RevealHighlight ]) [comment]: # (Other settings are documented at https://revealjs.com/config/) <style type="text/css"> .reveal p { text-align: left; } .reveal ul { display: block; text-align: left; } .reveal ol { display: block; text-align: left; } .reveal h1, h2, h3 { display: block; text-align: center; } .reveal h4, h5 { display: block; text-align: left; } .reveal pre { font-size: 1.3em} </style> # GIS Analyses using Free and Open Source Software (FOSSGIS) <br> <br> ### Christina Ludwig, Veit Ulrich ### October 16, 2024 | Institute of Geography | Heidelberg University <br> <br> ### Please fill out this survey: [https://pollev.com/christinalud976](https://pollev.com/christinalud976)
## Agenda 1. Course organisation 2. What is Free and Open Source Software? 3. To-Dos for next week 4. Questions and introduction to git
## Lecturers #### Christina Ludwig Research Associate at GIScience Research Group and HeiGIT **Office** INF 348, room 12B **Contact** christina.ludwig@uni-heidelberg.de <br> #### Veit Ulrich Research Associate at HeiGIT **Office** HeiGIT (Berliner Str. 45), room 002 **Contact** veit.ulrich@uni-heidelberg.de <br> #### Lars Reckhaus (Tutor)
## So who are you? <br> <br> ### Survey result: [https://pollev.com/christinalud976](https://pollev.com/christinalud976)
## Learning Goals of this course By the end of this course, you will be able to … - … **perform GIS analyses** using Free and Open Source GIS (QGIS, GRASS GIS, gdal/ogr). - … find suitable FOSSGIS tools online and **teach yourself how to use them.** - … find suitable **open data** online for your analysis. - … implement a GIS analysis in a **script based, automated way.**
## Writing scripts instead of clicking in QGIS <table> <tr> <td> <img src="./img/qgis.png" height="600" > </td> <td> <img src="./img/script.png" height="600" > </td> </tr> </table>
## This requires learning to use the command line <img src="./img/cmd.png" height="600" >
## Learning Goals of this course By the end of this course, you will be able to … - … **perform GIS analyses** using Free and Open Source GIS (QGIS, GRASS GIS, gdal/ogr). - … find suitable FOSSGIS tools online and **teach yourself how to use them.** - … find suitable **open data** online for your analysis. - … implement a GIS analysis in a **script based, automated way.** - … use the **command line.** - … **use git** to track your progress and share your GIS analysis. - … **discuss the limitations and uncertainties** of your GIS analysis.
## Prerequisites **“Introduction to GIS”** is required (for geography students). **Required prior knowledge** * **Basic concepts of GIS, e.g.** * Coordinate Reference Systems and transformations * Vector & raster data formats * **Basic knowledge of QGIS** * Importing and exporting vector and raster data * Changing the style of layers * Working with the attribute table * Performing basic vector and raster analyses (e.g. clip, buffer, raster calculations, etc.) * QGIS Model Builder If some of these things seems unfamiliar to you, take a look at a QGIS Tutorial, e.g. * [Introduction to GIS](https://courses.gistools.geog.uni-heidelberg.de/giscience/gis-einfuehrung) * [QGIS Tutorials](https://www.qgistutorials.com/en/)
## Grading ### Assignments (25%) - 3 bi-weekly assignments (until Christmas break) - in pairs of two students - different pairs for each assignment <br> <br> ### Group project (75%) Perform a spatial analysis by implementing an automated workflow using different FOSSGIS tools. - In pairs of two students #### Timeline: - End of November: Choose group and topic, submit 1-page project proposal - January: short presentation (25%) - April: Brief report (75%)
## Example: Find a suitable location for a pizza delivery 
## Example: WebApp to find best Kindergarten You can also combine your project with what you do in another course 
## Seminar and tutorial dates **Seminar** (attendance mandatory) - Time: Wednesdays 9:15 - 10:45 AM - **Place: seminar room 004, Im Neuenheimer Feld 348** - If you cannot attend, send email with reason for not attending as soon as possible **Tutorial** (attendance optional) - Purpose: ask questions about assignments - Given by Lars - Time: to be decided -> Vote in survey (see [course webpage](http://fossgis.courses-pages.gistools.geog.uni-heidelberg.de/home/content/overview/current.html)) - Place: to be decided [Time schedule](http://fossgis.courses-pages.gistools.geog.uni-heidelberg.de/home/content/overview/time_schedule.html)
## Deadlines **Deregistration** is possible until **Monday October, 22** via email to [christina.ludwig@uni-heidelberg.de](mailto:christina.ludwig@uni-heidelberg.de) There are people on the waiting list. **Submission deadlines:** Let us know as soon as possible if you cannot meet a submission deadline/presentation and provide a justified reason for missing them (e.g. illness). Otherwise, you will lose credits.
## Any questions so far?
## What is **Free and Open Source Software**? 1. What are the differences between * **Free** Software, * **Open-Source** Software and * **Proprietary** Software? 2. Give examples for proprietary vs. free and/or open-source software. Discuss in pairs of two for **5 minutes.**
## The Free Software Definition According to the [Free Software Foundation](https://www.fsf.org) Free Software has the freedom to ... 1. **[run]()** the program, for any purpose. 2. **[study]()** how the program works, and adapt it to your needs. 3. **[redistribute]()** copies. 4. **[improve]()** the program, and release your improvements to the public, so that the whole community benefits. → **Free as in free speech, not as in free beer.**
## Free Software vs. Open-Source Software: Richard Stallman, founder of the Free Software Foundation, explains: "The two terms describe almost the same category of software, but they stand for views based on fundamentally different values. **Open source is a development methodology; free software is a social movement.**" [[1]](https://www.gnu.org/philosophy/open-source-misses-the-point.html.en) → Still the requirements are very similar so it is usually combined to **Free and Open Source Software (FOSS)**
## What is FOSS GIS? <img src="img/fossgis.png" alt="fossgis" width=1200>
## We will also use FOSS by HeiGIT and GIScience ### openrouteservice: Route planning and accessibility analyses <img src="img/ors.png" alt="fossgis" width=800> <br> ### ohsome API: Download and analysis of OpenStreetMap data <img src="img/ohsome.png" alt="fossgis" width=800>
## Course material <br> #### Course webpage http://fossgis.courses-pages.gistools.geog.uni-heidelberg.de/home/content/intro.html <br> #### GitLab https://courses.gistools.geog.uni-heidelberg.de/fossgis/home - For submission of assignments (see videos in assignment 1 on how to do this) and discussion of questions as gitlab issues - Log in using your uni ID.
## Todos until seminar next week (see section 'Overview/Current TODOs' on course webpage) http://fossgis.courses-pages.gistools.geog.uni-heidelberg.de/home/content/overview/current.html 1. Participate in the [survey to find a date for the tutorium](https://terminplaner.dfn.de/l6D5RQbCNlRe7d2R). 2. Log into [the course GitLab](https://courses.gistools.geog.uni-heidelberg.de/fossgis/home). If you have problems, write me an email. 3. Fill in your [operating system](https://fossgis24.pads.ccc.de/1). Click edit, fill in your operating system and click save. 3. Set up the required software on your computer. [Software Setup Instructions](http://fossgis.courses-pages.gistools.geog.uni-heidelberg.de/home/content/overview/software.html) 4. Watch the video ["What is Git? Explained in 2 Minutes!"](https://www.youtube.com/watch?v=2ReR1YJrNOM) 5. Start with the [first assignment](https://courses.gistools.geog.uni-heidelberg.de/fossgis/fossgis_assignment_01). Choose a partner for this assignment until **Friday, 12:00.** Afterwards we will assign groups.
## Any questions?
### git is a Version Control System * A Version Control System is a software that **tracks the file changes** of all contributors within a project. * Originally developed to **assist collaborative open source software development** by Linus Torvalds (Initiator of Linux development) * The **user chooses which files are tracked** and which file changes are recorded. * All tracked files of a project are stored in a **git repository** ("repo"). For a short explanation of the concept of git, watch the video ["What is Git? Explained in 2 Minutes!"](https://www.youtube.com/watch?v=2ReR1YJrNOM)
## References [0] [The Free Software Foundation: About](https://www.fsf.org/about/) [1] [Stallman, R.: Why Open Source Misses the Point of Free Software](https://www.gnu.org/philosophy/open-source-misses-the-point.html.en)