State of GeoTools 2012


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State of GeoTools 2012

  1. 1. State of GeoTools 1
  2. 2. About your PresenterJody Garnett LISAsoftActivities LISAsoft GeoTools PMC A great system integration GeoServer PSC company helping our uDig PSC customers make effective use of open source spatial. OSGeo Charter Member OSGeo Incubation Chair LocationTech 2
  3. 3. Thanks to Previous PresentersJustin Deolivera Andrea Aime(PMC) (PMC)OpenGeo GeoSolutions Bringing the best open source GeoServer/GeoTools core geospatial software to developers, raster data organisations around the management, map rendering, world. spatial data processing 3
  4. 4. GeoToolsThe Java GIS Toolkit 4
  5. 5. GeoTools - the Java GIS Toolkit 5
  6. 6. About GeoToolsOpen Source 1994 - Present LGPL Really old for Java Open Development Started in Leads University Public Process OSGeo Project in 2006 Anyone can Play Active / Diverse committers 6
  7. 7. History1994 GeoTools (and GeoTool “Lite”) Version 1 had more users then documentation Solution was to fire the users ...2002 GeoTools 2 We learned - GeoTools 2 leans on the OGC standards OGC provides public standards They are documentation we do not have to write Benefit: Development was faster without inventing names2010 GeoTools Back to simply “GeoTools” 7
  8. 8. Traditional Diagram of Boxes 8
  9. 9. Why Mapping 9
  10. 10. Why MappingMap for YourMother!(or Dad!) 10
  11. 11. Do your Parents Know what you Do? 11
  12. 12. UML bad / Map good GeoServer Gallery by Text Gérald Estadieu 12
  13. 13. State of GeoTools 2012 13
  14. 14. Community 261 Andrea Aime (GeoServer) - GeoSolutionsgeotools-devel: 261 Jody Garnett (uDig) - Lisasoft 167 Simone(GeoServer) - GeoSolutions    414 members total 123 Justin Deoliveira (GeoServer) - OpenGeo 114 Michael Bedward (JAITools)geotools-gt2-users: 66 Danielei (GeoServer) GeoSolutions 54 Ben Caradoc Davies - CSIRO    969 members total 51 Niels Charlier - CSIRO 32 moovida (JGrass) - Hydrologis 28 ang05a - CSIRO2010 Stats tracking commits 25 groldan - (GeoServer) - OpenGeo 17 mpazos - Axios 15 victortey - CSIRO30 committers 9 kengu - Norwegian Uni of Tech & Science10 organisations 8 ischneider - OpenGeo 7 ianturton - University of Leeds 7 jesseeichar - CampToCamp 7 lmoran - Consultant 6 afabiani - GeoSolutions 2 alfonx (AtlasStyler) - WikiSquare 14
  15. 15. Summary• Ohloh summary Q: Jump in Size? A: Move to SVN then move to GIT 15
  16. 16. Issue Tracker Activity Real Lock Down this year for 8.0 Release!Created vs resolved tickets (click image for update ) 16
  17. 17. Name Change Dropping the “2” 17
  18. 18. GeoTools 2 now called GeoTools• What is in a Name? • sed/GeoTools 2.8.0/GeoTools 8.0/• What does this mean? • Not very much - business as usual• What does that really mean? • It means there is no plans for a “GeoTools 3” rewrite :-) • Confidence in our community • Continue our commitment to stability • Evolution handled with continuous small changes 18
  19. 19. Documentation Its a feature - really 19
  20. 20. User Guide - Before 20
  21. 21. User Guide - After 21
  22. 22. Code Examples - Before (Wiki)private synchronized static FeatureSourcebuildMemoryFeatureSource(FeatureCollection coll, String typename,FeatureType currentFeatureType, AttributeType newTypes[]){ FeatureType ftState=null; MemoryDataStore MStore=null; try { MStore = new MemoryDataStore(); //---- current attributes AttributeType currentTypes[] = currentFeatureType.getAttributeTypes(); Compile? //---- new array of attributes = current array+ new attributes AttributeType typesNew[] = new What Version?AttributeType[currentTypes.length+newTypes.length]; When? for(int i=0;i<currentTypes.length;i++){ typesNew[i] = currentTypes[i]; } All very good for(int i=0;i<newTypes.length;i++){ typesNew[currentTypes.length+i] = newTypes[i]; questions with no clear } answer. ftState = FeatureTypeFactory.newFeatureType(typesNew, typename); MStore.createSchema(ftState); Iterator iterator = coll.iterator(); FeatureCollection newColl = FeatureCollections.newCollection(); Feature feature, newFeature; Object[] objs; try { for( int count=0; iterator.hasNext(); count++) { 22 feature = (Feature);
  23. 23. Code Examples - After (Sphinx)private synchronized static FeatureSourceSimpleFeatureSource  alter(SimpleFeatureCollection  collection,  String  typename,buildMemoryFeatureSource(FeatureCollection coll, String typename,                SimpleFeatureType  featureType,  final  List<AttributeDescriptor>  newTypes)  {FeatureType currentFeatureType, AttributeType newTypes[]){                try  { FeatureType ftState=null;                 MemoryDataStore MStore=null;                //  Create  target  schema try {                SimpleFeatureTypeBuilder  buildType  =  new  SimpleFeatureTypeBuilder(); MStore = new MemoryDataStore();                buildType.init(featureType); //---- current attributes                buildType.setName(typename); AttributeType currentTypes[] = currentFeatureType.getAttributeTypes();                buildType.addAll(newTypes); Pulled Live from                 //---- new array of attributes = current array+ new attributes                final  SimpleFeatureType  schema  =  buildType.buildFeatureType(); Source! AttributeType typesNew[] = new                //  Configure  memory  datastoreAttributeType[currentTypes.length+newTypes.length];                final  MemoryDataStore  memory  =  new  MemoryDataStore();                memory.createSchema(schema); GeoTools Version at for(int i=0;i<currentTypes.length;i++){                typesNew[i] = currentTypes[i];                collection.accepts(new  FeatureVisitor()  { the Top of the Page! }                        public  void  visit(Feature  feature)  { for(int i=0;i<newTypes.length;i++){                                SimpleFeatureBuilder  builder  =  new  SimpleFeatureBuilder(schema); typesNew[currentTypes.length+i] = newTypes[i];                                 }                                builder.init((SimpleFeature)  feature); ftState = FeatureTypeFactory.newFeatureType(typesNew, typename);                                for  (AttributeDescriptor  descriptor  :  newTypes)  { MStore.createSchema(ftState);                                        builder.add(DataUtilities.defaultValue(descriptor));                                }                                 = coll.iterator(); Iterator iterator FeatureCollection newColl = FeatureCollections.newCollection();                                SimpleFeature  newFeature  =  builder.buildFeature(feature.getIdentifier().getID()); Feature feature, newFeature;                                memory.addFeature(newFeature);                        }objs; Object[] try {                },  null); 23                 for( int count=0; iterator.hasNext(); count++) {
  24. 24. Code Examples - Example Used for both Java code examples and also configuration files such as maven pom.xml. 24
  25. 25. Diagrams - Before (Visio) 25
  26. 26. Diagrams - After (Inkscape) 26
  27. 27. Class Diagrams - Before 27
  28. 28. Class Diagrams - After (Object Aid) 28
  29. 29. Tutorials - Before 29
  30. 30. Tutorials - After 30
  31. 31. Advanced TutorialsFunction Finally a nice quick guide to how to create a function!AbstractDataStore Tutorial - Property DataStore The classic updated for GeoTools 8.ContentDataStore Tutorial - CSVDataStore New kid on the block; leaner; meaner and ready.Welcome Introduction for different developer communities.Update Have not used GeoTools in a while? Guide to updating. 31
  32. 32. Welcome Geomajas 32
  33. 33. Welcome GeoServer 33
  34. 34. Welcome uDig 34
  35. 35. Documentation HighlightsDetails- 291 “Pages”- longest page is 36 pages printed out on paper- Over 100,000 words- Written from Feb through to May- Accounts for every page of the wikiNew features- Extensive FAQ- whole project javadocs- module by module reference- plugins organised by module- build instructions 35
  36. 36. Referencing(do you know where your data is?) 36
  37. 37. Referencing• Ellipsoids, datum, map projections • Embedded EPSG database, over 5000 supported codes (gt-epsg-hsql module) • Reprojection utilitiesGeometry g = ...;CoordinateReferenceSystem wgs84 = CRS.decode("EPSG:4326");         CoordinateReferenceSystem utm32n = CRS.decode("EPSG:32632");Geometry gtx = JTS.transform(g);...SimpleFetureCollection fc = featureSource.getFeature();SimpleFeatureCollection fcTx =                 new ReprojectingFeatureCollection(fc, utm32n); 37
  38. 38. ProjectionsOld projections New Aitoff Albers Equal A. CassiniSoldner Mollweide Cylindrical Equidist. Krovak Robinson Lambert Conf. Mercator Oblique Mercator Eckert IV Orthogonal Polyconic Stereographic Winkel Tripel Transverse Mercator 38
  39. 39. Vector PluginsBoth direction and magnitude! 39
  40. 40. Vector Data Sources• Application schema* • JDBC• ArcSDE • DB2• Aggregating * • H2 spatial• CouchDb * • MySQL• CSV * • Postgis• DXF * • Oracle• Excel • SQL Server• Edigeo • Spatialite *• PreGeneralized • Teradata *• SimpleFeatureService * • Ingress• Shapefile (directory of)• WFS name* = new entry name = “unsupported” 40
  41. 41. JDBC DataStore "NG"• JDBC stores: • common base • over 200 ready to use tests, just prepare the test data and run • Parametric SQL views: define a new data source as a raw query • Extensions for native joins select ST_Union(the_geom) as geom  from countries where REGION = %region% 41
  42. 42. Application schema• Complex feature support• Recent development by CSIRO• Feature chaining, polymorphism• Better performance (native DBMS joins), memory use• Usable as vector data source, GML encoding, rendering 42
  43. 43. Raster Formats pixel power 43
  44. 44. Raster Data Sources• ArcGrid • imageio-ext based• ArcSDE • AIG• GeoTiff • DTED• GRASS * • ECW• GTopo30 • EnviHdr• Image Mosaic • ErdasImg• Image Mosaic JDBC * • EsriHdrJP2• Image Pyramid • MrSID• Image + World file • NITF*• JP2 direct Kakadu • RPFTOC• Matlab• Image collection * name * = new entry name = unsupported land 44
  45. 45. Non geo-referenced data 45
  46. 46. Image mosaic 46
  47. 47. RenderingGotta see it to believe it 47
  48. 48. Rendering 48
  49. 49. Layers• FeatureLayer: any vector + Style (shapefile, spatial db, WFS, ...)• GridCoverageLayer: in memory raster grid• GridReaderLayer: dynamic raster read from disk (leverage overviews and tiling)• WMSLayer: get maps from a WMS server• DirectLayer: (new feature!) roll your own custom paint method 49
  50. 50. StyleBuilder• Style API is inspired by SLD 1.0 and SE 1.1: • a style is a complex, deep object graph• StyleBuilder provides a set of hierarchical builders• Build a style easily, just pick the portion you need Style style = new StrokeBuilder().color(Color.BLUE)               .width(3).dashArray(5, 2)               .buildStyle(); 50
  51. 51. StyleBuilder• StyleBuilder allows you to freely mix CQL expressions• Provides “literate” methods allowing you to define your style using your IDE autocomplete fts = new FeatureTypeStyleBuilder(); fts.rule().filter("pop < 200000")    .polygon().fill().colorHex("#66FF66"); fts.rule().filter("pop between 200000 and 500000")    .polygon().fill().colorHex("#33CC33"); fts.rule().filter("pop > 500000")    .polygon().fill().colorHex("#009900"); 51
  52. 52. Showing the Map Part 1To start we get the data and create a StyleIn this case we open a file and generate a style from theschema FileDataStore store = FileDataStoreFinder.getDataStore(file); SimpleFeatureSource featureSource = store.getFeatureSource(); SimpleFeatureType schema = featureSource.getSchema(); Style style = SLD.createSimpleStyle( schema ); 52
  53. 53. Showing the Map Part 2Create Map and use JMapFrame to display MapContent map = new MapContent(); map.setTitle("Quickstart"); Layer layer = new FeatureLayer(featureSource, style); map.addLayer(layer); JMapFrame.showMap(map); 53
  54. 54. Pluggable Mark Factory TTF<Mark> <WellKnownName>ttf://Wingdings#0xF054</WellKnownName>  <Fill> <CssParameter name="fill">#000088</CssParameter> </Fill></Mark> 54
  55. 55. Pluggable Mark Factory Slash<Fill>  <GraphicFill>  <Graphic>    <Mark>      <WellKnownName>shape://slash</WellKnownName>      <Stroke>        <CssParameter name="stroke">0xAAAAAA</CssParameter>      </Stroke>    </Mark>    <Size>16</Size>  </Graphic> 55
  56. 56. Pluggable Mark Factories Interfacepublic interface MarkFactory {    public java.awt.Shape getShape(            Graphics2D graphics,             Expression symbolUrl,             Feature feature) throws Exception;} 56
  57. 57. Geometry transform Arrow Head Similar to SE 1.1 transformations, but open-ended,<PointSymbolizer>  <Geometry>     <ogc:Function name="endPoint">                <ogc:PropertyName>the_geom</ogc:PropertyName>     </ogc:Function>  </Geometry>  <Graphic>    <Mark>      <WellKnownName>shape://arrow</WellKnownName>      <Fill/> <Stroke/>    </Mark>    <Rotation>      <ogc:Function name="endAngle">         <ogc:PropertyName>the_geom</ogc:PropertyName>      </ogc:Function>    </Rotation>  </Graphic></PointSymbolizer> 57
  58. 58. Geometry transform Drop Shadow<Geometry>  <ogc:Function name="offset">       <ogc:PropertyName>the_geom</ogc:PropertyName>    <ogc:Literal>0.00004</ogc:Literal>     <ogc:Literal>-0.00004</ogc:Literal>  </ogc:Function><Geometry> 58
  59. 59. Geometry transform Implementation Based on functions, a pluggable extension pointpublic class FilterFunction_offset extends FunctionExpressionImpl implements GeometryTransformation {...public Object evaluate(Object feature) {        Geometry geom = getExpression(0).evaluate(feature, Geometry.class);        Double offsetX = getExpression(1).evaluate(feature, Double.class);        if(offsetX == null) offsetX = 0d;        Double offsetY = getExpression(2).evaluate(feature, Double.class);        if(offsetY == null) offsetY = 0d;        if (geom != null) {            Geometry offseted = (Geometry) geom.clone();            offseted.apply(               new OffsetOrdinateFilter(offsetX, offsetY));            return offseted;        } else {            return null;        } 59
  60. 60. Rendering Transform Wind MapTransform data before rendering. Contour extraction, windmaps, geometry clustering. Pluggable, add your function!<FeatureTypeStyle>    <Transformation>     <ogc:Functionname="gs:RasterAsPointCollection">       <ogc:Function name="parameter">             <ogc:Literal>data</ogc:Literal>  u v 60
  61. 61. Rendering Transform Contour Extract<FeatureTypeStyle>   <Transformation>     <ogc:Function name="gs:Contour">       <ogc:Function name="parameter">         <ogc:Literal>data</ogc:Literal>       </ogc:Function>       <ogc:Function name="parameter">         <ogc:Literal>levels</ogc:Literal>         <ogc:Literal>1100</ogc:Literal>         <ogc:Literal>1200</ogc:Literal> ....        <ogc:Literal>1700</ogc:Literal>         <ogc:Literal>1800</ogc:Literal>       </ogc:Function>     </ogc:Function>  </Transformation> 61
  62. 62. XML(what could be as fun as rendering? not xml) 62
  63. 63. XML Technology Parse Encode Supports GeoTools SAX SAX,DOM Filter, GML, SLD GeoTools DOM DOM Filter, GML, SLDGeoTools Transform XML Filter, GML, SLD JAXB SAX,DOM n/a XDO Filter, GML, SLD, WMS, WFS1.0,(Schema Assisted SAX,DOM XML XSD Generation 1) GTXML Filter, GML, SLD, WMS, WFS1.0,(Schema Assisted SAX,DOM XML WFS 1.1, WPS, XSD, and more... Generation 2) 63
  64. 64. Schema Assisted ParsingGeoTools Specific Technology; makes use of the schemainformation to minimise the code you need to write.You teach GeoTools how to “bind” a object once; and it willwork in any schema that uses those objects. 64
  65. 65. Schema Assisted EncodingThe same approach is used when encoding objects; basicallyusing the schema as a cheat sheet to sort out what to emitnext. 65
  66. 66. Extensionshigh value functionality built on top of GeoTools 66
  67. 67. BrewerWraps up the ColorBrewer for Java Developers; generating anormal Style you can use in GeoTools; or export to otherapplications.FeatureTypeStyle style = StyleGenerator.createFeatureTypeStyle( groups, ff.propertName(“population”), colors, "Generated Style", schema.getGeometryDescriptor(), StyleGenerator.ELSEMODE_IGNORE, 0.95, stroke); 67
  68. 68. GraphBecause getting there is half the fun.BasicLineGraphGenerator graphGen = newBasicLineGraphGenerator();for ( MultiLineString line : lines ) { graphGen.add( line );}Graph graph = graphGen.getGraph();EdgeWeigter weighter = new EdgeWeighter() { public double getWeight(Edge e) { SimpleFeature feature = (SimpleFeature) e.getObject(); Geometry geometry = (Geometry)feature.getDefaultGeometry(); return gometry.getLength(); }};DijkstraShortestPathFinder pf = new DijkstraShortestPathFinder( graph, start, weighter );pf.calculate();Path path = pf.getPath( destination ); 68
  69. 69. ProcessStill in Progress 69
  70. 70. ProcessAnnotation Based No more filling in massive data structures; GeoTools willgenerate based on annotations against a static method.Bridge Functions and Process Used for rendering transformations; allowing you muchgreater control of geometry prior to display.Massive influx of High Quality Processes The full range of processes defined by GeoServer havebeen back ported resulting in some of the best examples of howto use GeoTools.WPS Client Still unsupported ... nothing to see here 70
  71. 71. Process Annotation ExampleTutorial Coming soon!@DescribeProcess(title="Buffer", description="Buffers a geometry using distance")@DescribeResult(description="The buffered geometry")static public Geometry buffer( @DescribeParameter(name="geom", description="The geometry to be buffered") Geometry geom, @DescribeParameter(name="distance", description="The distance") double distance) { return geom.buffer(distance);} 71
  72. 72. Application Schema Graduated this year! 72
  73. 73. Application SchemaAuScope has completed their work on Application Schema.This is an interesting module that is able to take informationfrom several DataStores and "map" the values into the correctshape for publication against an application schema.This is used when the data format used cannot be generatedand must exactly match that provided by a standards body orexpert community.Thanks to Ben and the AuScope team for their dedication onthis very challenging problem. 73
  74. 74. Teradata DataStore Another spatial database into the mix! 74
  75. 75. Terradata DataStoreJesse Eichar (Camptocamp) took this module fromdevelopment, a quick unsupported beta period and tosupported status in record time. 75
  76. 76. EFeatureMapping between Eclipse Modelling Framework and GeoTools Feature Model. 76
  77. 77. EFeature• Kenneth Gulbrandsoy has been an amazingly active addition to the GeoTools community. Kenneth is a PHD student from Norwegian University of Technology and Science.• EFeature datastore allows teams to leverage their Java objects into the GeoTools dynamic feature system• Adding Spatial capabilities to EMF models • 98% finished • Goal is to make it a supported plugin in GeoTools • Docs are comming soon 77
  78. 78. Grass Raster reader Created and Graduated this year! 78
  79. 79. Grass Raster ReaderAndrea Antonello has pulled together support for the GRASSraster format and donated it to the GeoTools library (goingthrough the effort to match our quality assurance anddocumentation standards). 79
  80. 80. TemporalMerged into gt-main as core feature 80
  81. 81. TemporalThe temporal module has provided an enhanced range of timeand time range operations.Justin has gathered this up into the gt-main module as one ofthe cornerstones for WFS 2.0 Filter support.after = ff.after("date"), ff.literal(temporalInstant));within = ff.toverlaps("constructed_date"), ff.literal(period)); 81
  82. 82. Query Improvements Justin takes on WFS 2.0 82
  83. 83. Query ImprovementsJoin Justin has sorted out how Joins will be represented - finally!Function Between Jody and Justin Functions now have excellent runtime documentation. Arguments are now listed by name; with specific type information.Filter Evaluation over a Collection Niels (AuScope) has sorted out this one allowing you to control how many matches are required (one, any, all) when comparing groups of values.Temporal As mentioned temporal filter support has been added; seriously increasing the number of operations available. 83
  84. 84. Swing and SWT (Getting your GUI on) 84
  85. 85. SwingThe much loved gt-swing module has been used for years tomake the GeoTools tutorials visual. At long last, it is looking tograduate to supported status.Michael Bedward has been astar contributor this yearcleaning up the code base,making it testable, all thewhile answering questionson the email list. 85
  86. 86. SwingMajor clean up of the internals!JMapPane rewritten Ported to Layer, FeatureLayer, RasterLayer etc... DirectLayer support for Animation / map decorations Nice clean background renderingAbility to add new InfoTool classes via pluginSupport for InternationalisationSupported Status? Docs and Test Coverage improving by the dayComing Soon: Concurrent rendering 86
  87. 87. SWTA new addition to the project is a port of the gt-swing code toan easy to use component for SWT.Andrea Antonello (HydroloGIS) was responsible for this workand it looks like gt-swing and gt-swt will be able to share thesame data models as time progresses. 87
  88. 88. What is Past?Reflections on departed modules 88
  89. 89. Recently DroppedJDBCDataStore and PostGIS-Versioned The initial proof of concept JDBC datastore created in 2003 has finally been replaced. We had a good 2 year deprecation cycle to allow migration.GeoAPI The "opengis" interfaces have been folded back into the library allowing us to take responsibility, improve javadocs and dive into filter improvements for WFS 2.0 work. 89
  90. 90. What is Next?Ideas on the future of GeoTools 90
  91. 91. Future PlansProcess, Process, Process Web Processing Service is finally attracting funding, with it comes a lot of new process ideas, implementations and directions. Hold on it is going to be a wild ride!Prep for Java 7 try-with-resource Update our API to mark which items are “Closable”FeatureCollection as a Result Set For Java 5 we needed to prevent FeatureCollection extending java.util.Collections - so that iterators could be closed. We are completing this work by removing the deprecated method names (add, remove, etc...) This will allow FeatureCollection to be a simple result set. 91
  92. 92. Future RnD IdeasOSGi Bundles Branch started to explore this topic with contributors from several projects.Android Jody had a chance to look at what it would take to port GeoTools to Android. If you are interested in doing the work talk to us at the Code Sprint.3D A number of teams hook GeoTools to 3D engines each year. Anyone want to do it as part of the community?Geometry Curves and 3D Tisham Dhar (CSIRO) evaulated several alternatives. GeoToolshas components of ISO 19107 provided by SYS Technologies andthe of University Fachhochschule Koeln.MIL2525B Another classic we revisit each year - any takers? 92
  93. 93. Open Development Is so much more than open source 93
  94. 94. Get Involved - Open DevelopmentGeoTools provides clear “time boxed” procedures allowing you toplan your community involvement.Contribute Clean patch + test + description = contributionRequest for Change Open RFC procedure, time boxed allowing commit three daysafter submitting (we have to meet deadlines as well).Release Public release process - make a release to match your projectsschedule and deadlines.Procedures are in place just add developers (or money). 94
  95. 95. Get Involved - Unsupported AreaUnsupported is a scratch pad used to work on new ideas.Easy Commit Access Send email and read the developers guide; a PMC memberwill help you with the paper work.Unsupported does not mean unloved You get commit access to your module, and your workdeployed to maven nightly, and published each release.Formal review only when Ready Ask for a QA / Docs check at any time and graduate to aformal supported part of the library. 95
  96. 96. Predictable Release Cycle• The “wait” for GeoTools 8 was far too long.• GeoTools is switching to a 6 month release cycle:• Stable • monthly releases • New features that do not change the API or Stability• Master • 1-4: open for change proposals • 5: release candidate • 6: final release! 96
  97. 97. State of GeoTools Any Questions? Any time? 97
  98. 98. Upstream Projects Thanks! We dont Do this alone 98
  99. 99. Upstream ProjectsJTS Topology Suite (JTS) Provides the excellent Geometry support we enjoy inGeoTools. Thanks Martin!imageio-ext Provides geospatial raster formats to the Java AdvancedImaging project we use for coverages. Thanks Simone andGeoSolutions.jaitools Another extension to Java Advanced Imaging this timethanks to Michael Bedward. Really fun for processing andgenerating rasters. 99