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<!doctype html>
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<head>
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<title>New Major Release of GRASS GIS - NCGIS 2021</title>
<meta name="description" content="GRASS GIS talk slides for NCGIS 2021">
<meta name="author" content="Vaclav Petras, Anna Petrasova">
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<!--
GRASS GIS is an all-in-one tool for geospatial analysis and remote sensing made by users for users.
GRASS GIS is open source which removes the licensing hassle and cost and puts users to the center of the story.
This talk will highlight the new major release of GRASS GIS.
Version 8 provides a completely new first-time user experience and streamlines how users interact with their data.
New features include dark-themed interface support, Voronoi-based area skeletons,
gap filling, near feature attribute statistics, image collection support,
customizable solar radiance model, and unlimited fine-scale hydrologic simulation.
The new version contains all features from the previous versions including Python 3 scripting,
spatio-temporal data analysis, PostgreSQL connections, HPC cluster support, low-end hardware support, and more.
Experimental features available for download now include buffer statistics, road centerlines,
vector attribute update with Python syntax, coastal, stream, and dam flooding, mass-preserving interpolation,
transect generation, longest flow path, iterative subwatershed delineation, edge detection,
user and producer accuracies, attribute plots, valley flatness, cost-distance area connectivity,
and Sentinel, MODIS, USGS, and GBIF data download.
Additionally, issues, fixes, and ongoing improvements are now publicly accessible at GitHub.
This talk presents contributions by the whole GRASS GIS user and developer community
and highlights additions by the Center for Geospatial Analytics at North Carolina State University.
-->
<section>
<h1>New Major Release of GRASS GIS</h1>
<p style="margin-top: 0.5em">
<a href="http://wenzeslaus.github.io/">Vaclav (Vashek) Petras</a>
<br>
Anna Petrasova
</p>
<p class="title-foot">
<a href="http://geospatial.ncsu.edu/geoforall/" title="NCSU GeoForAll Lab">NCSU GeoForAll Lab</a>
at the
<a href="http://geospatial.ncsu.edu/" title="NCSU Center for Geospatial Analytics">Center for Geospatial Analytics</a>
<br>
<a href="http://www.ncsu.edu/" title="North Carolina State University">NC State University</a>
</p>
<img src="img/grass_gis.svg" class="stretch">
<p><small>NCGIS 2021 Virtual</small></p>
<p>
<a href="https://wenzeslaus.github.io/grass-gis-talks/ncgis2021.html">wenzeslaus.github.io/grass-gis-talks</a>
</section>
<section class="textimg">
<h2>Vaclav (Vashek) Petras</h2>
<ul>
<li>BS & MS in Geoinformatics, Czech Technical University in Prague
<li>PhD in Geospatial Analytics, NC State
<li>Geospatial Research Software Engineer at NC State
<li>GRASS GIS Development Team Member
<li>GRASS GIS Project Steering Committee Member
<li>Open Source Geospatial Foundation Charter Member
</ul>
<img src="img/vp_field_work.jpg">
</section>
<section>
<h2>Community & Shared Improvements</h2>
<ul>
<li>GRASS GIS community:
<ul>
<li>Provides software to the public.</li>
<li>Shares its source code.</li>
<li>Includes latest additions.</li>
</ul>
</ul>
<br>
<img src="img/grass_team.jpg" class="stretch">
<p><em>Credit goes to the whole community, not just this talk's authors.</em></p>
</section>
<section>
<h2>Real Virtual Community</h2>
<ul>
<li>Open community of users and developers</li>
<li>Contributors to code, documentation, translations, …</li>
<li>Project Steering Committee</li>
<li>PSC Chair: Verónica Andreo</li>
</ul>
<br>
<img src="img/psc_meeting_2021.png" class="stretch">
</section>
<section>
<h2>Access to Source Code</h2>
Documentation links to relevant parts of the source code.
<img src="img/module_author_source.png" class="stretch">
<p>by Luca Delucchi
</section>
<section>
<h2>Scientific Foundation</h2>
<ul>
<li>references to related scientific papers</li>
<li>references to papers associated with a tool</li>
</ul>
<br>
<img src="img/module_references.png" class="stretch">
</section>
<section>
<h2>Return of Investment</h2>
<ul>
<li>Emphasis on backwards compatibility</li>
<li>No increasing license fees over time</li>
<li>Employer-independent</li>
<li>Contractor-independent</li>
</ul>
<br>
<img src="img/modeler_skyview.png" class="stretch">
<aside class="notes">
Old commands, often work in new versions with minimal changes.
No increase in license fees over time.
</aside>
</section>
<!--
<section>
<h2>Changes vs Stability</h2>
<ul>
<li>Graphical user interface changes as needed.</li>
<li>Python API added in v6, extended in v7.</li>
<li>Basic things continue to work in the same way.</li>
</ul>
<p><em>Raster algebra expression from 2002 (v5) in 2021 (v8):</em></p>
<p>
<code style="font-size: larger;">
depressions<em style="background-color: #f84040;"> </em>=<em style="background-color: #f84040;"> </em>
if((elevation - fill) < 0, 1, 0)
</code>
</p>
</section>
-->
<section>
<h2>All-in-one</h2>
<!--
<p>
<em>GRASS covers many fields.</em>
</p>
-->
<ul>
<li>All matured tools available right away
<li>Download of experimental tools possible
<li>Network analysis, hydrology, remote sensing, …
</ul>
<br>
<img src="img/hexagons_3d_white_outlier.png" class="stretch">
</section>
<section>
<h2>GRASS GIS 8.0.0</h2>
<ul>
<li>Roadmap:
<ul>
<li>7.8.5 December 2020</li>
<li>7.8.6 Spring 2021</li>
<li>8.0.0 Spring 2021
<ul>
<li>Presented here</li>
<li>PROJ 6.0.0, 7.0.0 (and above) support</li>
</ul>
</li>
<li>8.0.1 Summer 2021</li>
</ul>
</li>
</ul>
<br>
<img src="img/pure_hexagons_on_surface.png" class="stretch">
</section>
<section>
<h2>Dark Theme Support</h2>
Interface respects system dark theme.
<br>
<img src="img/dark_theme_v_clip.png" class="stretch">
<p>by Anna Petrasova, Nicklas Larsson
</section>
<section>
<h2>Improved First-time User Experience</h2>
Initial project sets up automatically. Guidance provided for next steps.
<br>
<img src="img/first-time_user_world.png" class="stretch">
<p>
by Linda Kladivova &
rest of the community (many reviews, calls, user surveys, …)
</p>
</section>
<section>
<h2>Centralized Data Management</h2>
All data manipulation centered around revamped <em>Data</em> tab.
<br>
<img src="img/data_catalog_isolines.png" class="stretch">
<p>by Linda Kladivova, Anna Petrasova, Vaclav Petras
</section>
<section>
<h2>Skeletons and Centerlines</h2>
<em>v.voronoi</em> tool can now create area skeletons and centerlines.
<img src="img/lake_skeleton_naip.png" class="stretch">
<p>by Markus Metz
</section>
<section>
<h2>Faster External Data Links</h2>
<em>r.external</em> links (opens) external raster data (GeoTiffs, …) faster.
<br>
<small>(2-5× faster, or almost no time for some workflows)</small>
<br>
<img src="img/r_external_futures.png" class="stretch">
<p>by Markus Metz</p>
<p>Great for workflows when only portion of the data is processed in GRASS GIS.</p>
</section>
<section>
<h2>GitHub-centered Software Development</h2>
<ul>
<li>"Fork me on GitHub"</li>
<li>Filling out issues (tickets) requires only GitHub login.</li>
<li>All issues are publicly visible.</li>
</ul>
<img src="img/octocat.png" class="stretch">
</section>
<section>
<h2>Open an Issue: Feature Request</h2>
Open an issue to suggest a new feature.
<img src="img/github_issue_1144_feature.png" class="stretch">
</section>
<section>
<h2>Open an Issue: Bug Report</h2>
Open an issue to report that something is not working.
<img src="img/github_issue_1213_bug.png" class="stretch">
</section>
<section>
<h2>Propose Changes: Pull Request</h2>
Contribute to code or documentation by proposing a set of changes.
<img src="img/github_pr_1310_psmap_header.png" class="stretch">
</section>
<section>
<h2>Tests of Proposed Changes</h2>
<ul>
<li>To propose a change, contributor opens a pull request (PR)</li>
<li>Continuous integration (CI) in GitHub Actions runs checks</li>
<li>Checks of code quality, standards, functionality before code </li>
<li>Manual evaluation, testing and feedback</li>
<li>Repeat as needed</li>
</ul>
<img src="img/github_pr_1310_psmap_checks.png" class="stretch">
</section>
<section>
<h2>Google Summer of Code</h2>
<ul>
<li>Stipend program by Google for students.</li>
<li>Students work on code with an open source project.</li>
<li>New rules in 2021: shorter commitment, greater eligibility.</li>
<li>Students: Engage with an org. or project + Apply at Google.</li>
</ul>
<img src="img/gsoc_at_osgeo.png" class="stretch">
</section>
<!--
<section>
<h2>Code Quality</h2>
Documentation now links to relevant parts of the source code.
<img src="img/dark_theme_v_clip.png" class="stretch">
<p>by Nicklas Larsson
</section>
PROJ
-->
<section>
<h2>Support</h2>
<ul>
<li>Community support
<ul>
<li><a href="https://lists.osgeo.org/mailman/listinfo/grass-user">user mailing list</a> <small>(with vast archives since 1991)</small>
<li><a href="https://gis.stackexchange.com/questions/tagged/grass">GIS StackExchange</a>
<li>…
</ul>
<li>Commercial support
<ul>
<li><a href="https://www.mundialis.de/en/open-source-gis/">mundialis</a>
<li><a href="https://www.northrivergeographic.com/">North River Geographic Systems</a>
<li><a href="https://geospatial.ncsu.edu/engage/service-center/">Center for Geospatial Analytics, NC State University</a>
<li>…
</ul>
</ul>
<br>
<img src="img/grass_gis.svg" alt="GRASS GIS logo" class="stretch">
</section>
<section>
<h2>NCSU CGA Support</h2>
<ul>
<li>open source development and support</li>
<li>research software engineering as a service</li>
<li>consultation, skill-transfer, personalized training</li>
<li>support for tools created by NCSU CGA</li>
</ul>
<img src="img/ncsu_cga.png" class="stretch">
</section>
<section>
<h2>FUTURES</h2>
<p><em>r.futures</em> - set of tools for urban growth modeling</p>
<img src="img/FUTURES_Raleigh.png" class="stretch">
<p>by NC State Center for Geospatial Analytics</p>
<p>
See poster:
<br>
<em>FUTURES v2: Urban Growth Modeling at Scale</em>
<br>
Thursday, 5pm
</p>
</section>
<section>
<h2>PoPS</h2>
<p><em>r.pops.spread</em> - Pest or Pathogen Spread simulation</p>
<img src="img/pops_version_1.png" class="stretch">
<p>by NC State Center for Geospatial Analytics
</section>
<section>
<h2>Tangible Landscape</h2>
<p>Geospatial tangible user interface</p>
<img src="img/cli_tangible.png" class="stretch">
<p>by NC State Center for Geospatial Analytics</p>
</section>
<section>
<h2>Valley Bottom Flatness Index</h2>
<p><em>r.valley.bottom</em> - Multi-resolution Valley Bottom Flatness (MrVBF)</p>
<img src="img/r_valley_bottom_3d.png" class="stretch">
<p>by Helmut Kudrnovsky, Steven Pawley
</section>
<section>
<h2>Sentinel, MODIS, Landsat, NED, NAIP</h2>
<p>
Automated download and import of common datasets
<small>
i.sentinel, i.modis, i.landsat.download, r.in.usgs, …
</small>
</p>
<img src="img/usgs_ned_naip_3d.png" class="stretch">
<p>
<small>
by
Luca Delucchi (Fondazione Edmund Mach),
Martin Landa (OpenGeoLabs),
Anika Weinmann (mundialis),
Guido Riembauer (mundialis),
Roberta Fagandini (GSoC),
Zechariah Krautwurst (GSoC),
Anna Petrasova (NC State University),
Vaclav Petras (NC State University),
Veronica Andreo (CONICET, Argentina), …
</small>
</p>
</section>
<section>
<h2>Resources</h2>
<ul>
<li>
Documentation:
<ul>
<li>See <a href="https://grass.osgeo.org/grass78/manuals/graphical_index.html">full list of core tools</a>
<li>See <a href="https://grass.osgeo.org/grass78/manuals/addons">tools in Addons repository</a>
</ul>
<li>
Tutorials:
<ul>
<li>
<a href="https://grasswiki.osgeo.org/wiki/From_GRASS_GIS_novice_to_power_user_(workshop_at_FOSS4G_Boston_2017)">Introduction to GRASS GIS</a>
<li>
<a href="https://grasswiki.osgeo.org/wiki/Processing_lidar_and_UAV_point_clouds_in_GRASS_GIS_(workshop_at_FOSS4G_Boston_2017)">Processing lidar and UAV point clouds</a>
<li>
<a href="https://github.com/wenzeslaus/python-grass-addon">How to write a Python tool for GRASS</a>
<li>
<a href="http://ncsu-geoforall-lab.github.io/grass-temporal-workshop/">
Spatio-temporal data handling and visualization</a>
</ul>
<li>
Books:
<ul>
<li>Open Source GIS: A GRASS GIS Approach
<li>Tangible Modeling with Open Source GIS
<li>GIS-based Analysis of Coastal Lidar Time-Series
<li>Open Source Approaches to Spatial Data Handling
</ul>
</ul>
</section>
<section>
<img src="img/grass_gis.svg" alt="GRASS GIS logo" class="stretch">
<p>
Install GRASS GIS for free with this link in next 24 hours:
<a href="https://grass.osgeo.org/">grass.osgeo.org</a>
<p>
<a href="https://twitter.com/vaclavpetras/">Twitter: vaclavpetras</a>
<br>
<a href="https://www.linkedin.com/in/vaclav-petras-a24a1b114/">LinkedIn: Vaclav Petras</a>
</p>
<p>
<a href="https://wenzeslaus.github.io/grass-gis-talks/ncgis2021.html">wenzeslaus.github.io/grass-gis-talks</a>
<p><em>Thank you for Attending - This Session Has Ended</em></p>
</section>
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