saga gis 2.0.7

GEOSTAT 2011 News & Updates System for Automated Geoscientific Analyses

SAGA

System for Automated Geoscientific Analyses

Dr. Olaf Conrad, Alexander Czech, Dr. Jan WehbergPhysical Geography, University Hamburg


What is SAGA ?

• SAGA is a Geographic Information System software with immense capabilities for geodata processing and analysis.

• SAGA is programmed in the object oriented C++ language and supports the implementation of new functions with a very effective Application Programming Interface (API).

• Functions are organised as modules in framework independent Module Libraries and can be accessed via SAGA’s Graphical User Interface (GUI) or various scripting environments.

Print LayoutMap View

Histogram Properties

Scatterplot

Attributes

Notifications

Workspace


Key Features

• Object oriented system design

• Modular structure allows framework independent function development

• API with strong support for geodata handling

• GUI for intuitive data management, analysis and visualization

• Far more than 450 freely available functions for geodata analysis

• Runs on Linux as well as on Windows operating systems

• Portable software running without installation even from memory sticks

• Free and Open Source Software

Command Line

Python

R Script

Graphical User Interfaceuser interaction and visualisation

Module Management Data Management

Module Librariesimplementation of geoscientific methods

Application Programming Interfacecomprehensive data structures and toolsets

Library A Library CLibrary B

System Architecture


Drivers of Development

• SAGA’s development is mainly driven by the research interests of its inventors and developers

• Physical Geography, Univ. Hamburg

• SciLands GmbH, Göttingen

• Laserdata GmbH, Innsbruck

• SAGA’s publication as FOSS lead to several external inputs enriching the spectrum of developments

• V. Olaya: SEXTANTE (Sistema Extremeno de Analisis Territorial), SAGA manual, module & system development

• T. Schorr: GEOSTEP project, Linux, Unicode and 64bit compatibility, SAGA-Python interface

• V. Wichmann: PhD Thesis (rockfall modelling), Laserdata GmbH, support & documentation, module & system development

• V. Cimmery: SAGA 2 User Guide, documentation

• A. Brenning: RSAGA plugin, accessing SAGA modules from R environment

• J. van de Wauw: Linux support and distribution (Debian/Ubuntu), bug fixes, module development

• J. Brunke: Power User, Environment Agency, County Gifhorn

• and many other contributions, mainly modules and documentation


Drivers of Development | Current Projects

• CARBIOCIAL – Carbon sequestration, biodiversity and social structures in Southern Amazonia: models and implementation of carbon-optimized land management strategies.

• The Future Okavango – Scientific support for sustainable land and resource management in the Okavango basin – GIS-based landscape analyses, environmental modelling, and decision support for integrated resource management.

• CHELSA - Climatologies at High Resolution for the Earth’s Land Surface Areas. A research cooperation of Institute of Systematic Botany, University Zürich, Biodiversity, Macroecology & Conservation Biogeography Group, University Göttingen and Physical Geography, University Hamburg.

• Development of a Model for the Spatial Prediction of Periglacial Deposits – Funded by the German Federal Institute for Geosciences and Natural Resources (BGR)

• SAGA-REKLIM – Climate Change and Forestry: Researches and developments for a SAGA based problem oriented regionalisation of spatially distributed climate data for Baden-Württemberg“.

• Spatial high resolution regionalization of urban climates, integrating statistical-dynamical downscaling and remote sensing techniques. Integrated Climate System Analysis and Prediction (CliSAP).


New Features

• Data Source Browser• File system

• Databases, web services (planned)

• Online description for modules• Optionally loading of module

description from SAGA‘s Wiki

• Including images, tables

• Show/hide parameters• Dependend on parameter settings

context, parameters can dynamically be shown or hidden

• Improved clearness because of more compact parameter lists.

• Modules• Naming of modules more

consistent with other GIS software

• Search for modules (> 450)

• Point Clouds for huge point data

• Region Growing Algorithm

• Database access

• And many more …


Data Import & Export

Projections

Raster Tools

Vector Tools

Terrain Analysis

Image Analysis

Modules

• SAGA comes with a comprehensive and growing set of free modules, most of them published under the GPL

2005: 34 libraries, 119 modules, v1.22007: 42 libraries, 234 modules, v2.0.02008: 48 libraries, 300 modules, v2.0.32009: 49 libraries, 330 modules, v2.0.42010: 56 libraries, 401 modules, v2.0.52011: 63 libraries, 447 modules, v2.0.7

• Not all modules are highly sophisticated analysis or modeling tools. Many modules perform rather simple data operations. But several other modules represent the state of the art in their field of analysis.

• Data Import & Export• Cartographic Projections & Georeferencing• Numerous Raster & Vector Data Tools• Image Processing• Terrain Analysis• Geostatistics• and many more…


LiDAR | Light Detection And Range

Pulse Ranging


Object Based Image Analysis (OBIA)

Pixel Based Region GrowingWatershed


Object Based Image Analysis (OBIA) | Region Growing

Image Seeds

Region Growing AlgorithmVectorisation & Postclassification


Terrain Analysis | Landscape Units

Curvature Classification

Region GrowingRepresentativeness

Watershed SegmentationCluster Analysis

Principal Components


Terrain Analysis | Insolation


Terrain Analysis | Insolation

Direct Diffuse Direct / Diffuse Duration (direct)


Climate | Database Access

• Database access via Open Data Base Connection (ODBC) interface.

• Based on the OTL (ODBC Template Library)

• Supports PostGIS extension to PostgreSQL

a.wmo_id=b.wmo_id AND a.wmo_mod=b.wmo_mod AND b.year=1950

Global Historical Climate Network (GHCN)


Climate | Monthly Mean Temperatures 1950-1952


Climate | Incorporating GCM

DecemberDecember

JuneJune


Climate | Temperature & Wind Effect

December June


Climate | CHELSA Project

• CHELSA – Climatologies at High resolution for the Earth’s Land Surface Areas• Comparable to ‘WorldClim’ (www.worldclim.org)

• Global Resolution:1000m

• Climate Observations from weather stations (GHCN, FAO, …)

• SRTM DEM and derived terrain parameters

• GCM (General Circulation Model) Data (e.g. NCAR/NCEP Reanalysis)

• Biodiversity, Macroecology & Conservation Biogeography Group, University of Göttingen• Institute for Systematic Botany, University of Zurich• Physical Geography, University of Hamburg


Simulation of Dynamic Processes

Runoff

Soil Moisture N Distribution

Cold Air Flow


Just another ‘Biogeographical’ Application performed with SAGA

I hope you enjoyed!

Many thanksfor your attention

www.saga-gis.org

Czech, A. (2010): GIS gestützte morpho-metrische Analyse von Okklusalflächen mit SAGA GIS. Bachelorarbeit. Univ. Hamburg.


SAGA | Further Information

Explore the world of SAGA GIS

• http://www.saga-gis.org• Basic information

• Comprehensive list of references

• http://sourceforge.net/projects/saga-gis• SourceForge > host for OSS projects

• Download software, documents, data

• SAGA Wiki

• Bug, Feature Tracker

• User Forum

• User Guide and Manual

www.saga-gis.org

sourceforge.net/projects/saga-gis

User Forum WiKi Vern Cimmery’s User Guide


Additional Downloads for GEOSTAT 2011 Workshop

www.saga-gis.org / geostat2011


• Tuesday

• Block 1:

• 01: GIS-Basics, Coordinate Systems, Development and Architecture of SAGA, Key Features, First Steps

• 02: Data Management - A Practical Introduction. Visualization, Downloads, Subset, SRTM, Import & Merge Data, Landsat, Projection

• Block 2:

• 03: Raster Data, Color Composites, Histogram and Scatterplot, Filter, NDVI, unsupervised and supervised Classification, Change Detection, Object Based Image Analysis, Terrain Classification

• 04: Table Calculator, Line-Polygon Intersection, Join a Table, Correlation Analysis (Geographically Weighted Regression)

saga gis 2.0.7

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modules sagacomes

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module development

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