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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseMarkus NetelerFondazione E. Mach – CRI, Italyhttp://gis.cri.fmach.it& GRASS Development TeamFOSS4G-CEE 2013Bucharest, RomaniaNews in GRASS GIS 7

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS GIS 7 User interfaceDE JA PL

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS GIS: InteroperabilityLAS

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS: Project database (Location) wizardFrom GeoTIFFor SHAPE or ...And directlyimport file

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: New map histogram toolUsing the Wake county “elevation” map:Map will be preselectedif selected in Layer Manager

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: Adding a grid to the map view● Grids● Labels● Geodesic lines● Rhumblines

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: New Geospatial ModellerExtra bonus:export to Python scripts

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: New visualization tool: wxNVIZhttp://grasswiki.osgeo.org/wiki/WxNVIZProgramming/screenshot:Anna Kratochvílová

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseVector geometry typesPointCentroidLineBoundaryArea (boundary + centroid)face (3D area)[kernel (3D centroid)][volumes (faces + kernel)]Geometry is true 3D when: x, y, znotinallGIS!FacesGRASS Topological 2D/3D Vector model

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: Topological Vector Digitizer

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: Topological Vector Digitizerin PostGIS 2 (under development)http://grass.osgeo.org/grass70/manuals/v.out.postgis.htmlhttp://grasswiki.osgeo.org/wiki/PostGIS_TopologyProgrammer: Martin LandaCofunded by Municipality of Trento, Italy

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseNews in GRASS 7s Vector TopologySpatial query exampleQuery of vector point mapsGUI: click on vector map, what is there?CLI: v.what east_north=east,north0 2 4 6 8 10 120120240360480600GRASS 6.4.2GRASS 7million pointsseconds

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseVector network analysis in GRASSGRASS vector network analysis

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseVector network analysisGeneral concept of a network graph● Arcs connected by nodes● Forward/backward costs assigned to each arc (oneway road)● Starting point(s)● Ending point(s)GRASS vector analysisCost definition examples● Distance● Travelling time● Travelling costs (fuel, train ticket, etc) shortest path fastest path cheapest pathGsoC 2013: implementation of turns support

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseTraveling time as costsResultNetwork analysis: traveling salesman

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseDistances as costsResultNetwork analysis: traveling salesman

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseDistances as costsResultNetwork analysis: allocate subnets… and many more algorithms... see the manual!

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseNew Space-Time functionality in GRASS 7

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: New animation tool for time serieshttp://grass.osgeo.org/grass70/manuals/g.gui.animation.html

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseNew Map swiping tool for multitemporal mapsPre and post disaster images of the tsunami in Japan in 2011(MODIS images taken on February 26 and March 13, 2011)

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: New geocoding toolImage/Map rectifierFor raster (imagery,historic scans) andvector maps

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7 Addons: User contributed extensionshttp://grass.osgeo.org/wiki/AddonsThe Addons repository is SVN based:User can easily obtain write access to develop new functionalityInstallation withextension managerIncreasing inflowof Python scripts

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseSupport for massivespatial datasetsin GRASS GIS

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: Support for massive datasetsWhat is massive?Massive is relative toHardware resourcesSoftware capabilitiesOperating system capabilitiesLimiting factorsRAMProcessing timeDisk spaceLargest supported file size

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: Support for massive datasetsCost surfaces: r.cost0 1 2 3 4 5 6 7 8 9 100120240360480600GRASS 6.4.2GRASS 7million pointssecondsOther speed figure:PCA of 30 million pixelsin 6 seconds on this smallpresentation laptop...

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseMain basinsNew tools for hydrological modellingDistance to the outlet

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseProgramming own applicationswith GRASS GIS 7

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS and PythonScript part:Parser part (for GUI autocreation and command line support):

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseNew GRASS 7 Python APIhttp://grass.osgeo.org/wiki/GRASS_and_Python

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseNew GRASS 7 Python APIhttp://dx.doi.org/10.3390/ijgi2010201

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7 Programmers manualhttp://grass.osgeo.org/programming7/

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS GIS as Open Source GIS backbone:Connecting to other software packages

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseNew GRASS and QGIS Integration: Sextantehttp://grass.osgeo.org/wiki/GRASS_and_Sextante

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseSEXTANTE – GRASSIntegration: ModellerNote:Partially functional ingvSIG OADE 2010,more to come in (near) future...

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseQGIS-Sextante – Using GRASS in QGIS via Sextante123http://grasswiki.osgeo.org/wiki/GRASS_and_Sextante

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseQGIS-Sextante – Vector dissolving exampleDissolving geometry by string column attributes:Sextante calls GRASS GIS in a virtual sessionwhich deliver the result back (here SHAPE file)

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: Native WPS Support

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS and R IntegrationGRASS 7.0.svn (nc_spm_08_grass7):~ > RR version 3.0.1 (2013-05-16) -- "Good Sport"Copyright (C) 2013 The R Foundation for Statistical ComputingPlatform: x86_64-redhat-linux-gnu (64-bit)> library(spgrass6)Loading required package: spLoading required package: XMLGRASS GIS interface loaded with GRASS version: GRASS 7.0.svn (2013)and location: nc_spm_08_grass7>> myrast <- readRAST6(c("geology", "elevation"), cat=c(TRUE, FALSE))> myvect <- readVECT6("roads")…> writeRAST6(myrast, "elev_filt", zcol="elev")...http://grass.osgeo.org/wiki/R_statistics

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseVisualization

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseVisualization: GRASS data exportto for Augmented RealityGRASS GIS,Paraview, andARToolkit

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©2013,MarkusNeteler,Italy–CC-BY-SAlicensehttp://it.wikipedia.org/wiki/Imaging_a_risonanza_magneticaOur FEM colleague-->Personal comm.A researchers brain... From MRT scanto Voxels

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseA researchers brain... From MRT scanto Voxels

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseA researchers brain... From MRT scanto Voxels

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseA researchers brain... From MRT scanto Voxels

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: News in Image processingImproved modules:GeorectificationOrthorectificationAtmospheric correctionTerrain correctionLandsat cloud detection

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseOrtho-rectification of aerial imagesWhy using the DEM for imagerectification:Incorporating the DEMfixes the rectificationproblemLinear rectification (insufficient)(Problem commonly seen in Google Earth)Ortho-rectificationOK at bottomof valleyWrong inaltitudeWrong inaltitudeIncorporating the DEMfixes the rectificationproblem

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseGRASS 7: New bivariate ScatterplotsLANDSAT 7 2002 channels 1 and 3 of Wake county, NC

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseSupervised image classificationhttp://geo.fsv.cvut.cz/~landa/publications/2012/ogrs2012/poster/figures/Tool for supervised classification of imagery data.Generates spectral signatures for an image by allowingthe user to outline regions of interest.

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseUnsupervised image classification – Segmentation# set comp. region to orthophoto but align pixels to elevation map (for speed reasons in# this demonstrational exercise – for real work please use the true resolution)g.region rast=ortho2010_t792_subset_20cm.blue align=elev_lid792_1m -p# Note: the RGB bands are organized as a groupi.segment group=ortho2010_t792_subset_20cm output=ortho2010_t792_subset_20cm_segment goodness=ortho2010_t792_subset_20cm_seg_fit threshold=0.25Finally vectorize with r.to.vecti.segment - Identifies segments (objects) from imagery data.

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseWhere is the stuff?GRASS GIS Software:Free download for MS Windows, MacOSX, Linux and source code:http://grass.osgeo.org/download/Addons (user contributed extensions):http://grasswiki.osgeo.org/wiki/GRASS_AddOnsFree sample data:Rich data set of North Carolina (NC)… available as GRASS GIS location and in common GIS formatshttp://grass.osgeo.org/download/sample-data/User Help:Mailing lists (also in different languages):http://grass.osgeo.org/support/Wiki:http://grasswiki.osgeo.org/wiki/Manuals:http://grass.osgeo.org/documentation/manuals/

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©2013,MarkusNeteler,Italy–CC-BY-SAlicenseMarkus NetelerFondazione E. Mach (FEM)Centro Ricerca e InnovazioneGIS and Remote Sensing Unit38010 S. Michele allAdige (Trento), Italyhttp://gis.cri.fmach.ithttp://www.osgeo.orgmarkus.neteler@fmach.itneteler@osgeo.orgEnjoy GRASS GIS 7!THANKS!PostGISomicshttp://grass.osgeo.orghttp://trac.osgeo.org/grass/wiki/Grass7/NewFeatures