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Raster data in GeoServer and GeoTools : achievements , issues and future developments

Raster data in GeoServer and GeoTools : achievements , issues and future developments. Ing . Andrea Aime GeoSolutions. GeoSolutions. Founded in Italy in late 2006 Expertise Image Processing, GeoSpatial Data Fusion Java, Java Enterprise, C++, Python

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Raster data in GeoServer and GeoTools : achievements , issues and future developments

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  1. Raster data in GeoServer and GeoTools: achievements, issues and future developments Ing. Andrea Aime GeoSolutions

  2. GeoSolutions • Founded in Italy in late 2006 • Expertise • Image Processing, GeoSpatial Data Fusion • Java, Java Enterprise, C++, Python • JPEG2000, JPIP, Advanced 2D visualization • Supporting/Developing FOSS4G projects • GeoServer, MapStore • GeoNetwork, GeoNode, Ckan • Clients • Public Agencies • Private Companies • http://www.geo-solutions.it FOSS4G 2015, Seoul 14th-19th September 2015

  3. The technology stack FOSS4G 2015, Seoul 14th-19th September 2015

  4. GeoServer raster processing WCS WMS WMTS WPS GeoTools ImageIO-Ext JAI-Ext JAITools JAI-ImageIO JAI GDALKakadu FOSS4G 2015, Seoul 14th-19th September 2015

  5. Java Advanced Imaging • Huge number of basic building operations • Tile-based, deferred execution model • Integrate Tile Caching • Easily Extensible • Natively Accelerated Code available for many operations • Supports multithreading • Development more or less stopped! Read Read Crop Scale Mosaic Clamp Cache FOSS4G 2015, Seoul 14th-19th September 2015

  6. JAI-EXT • Built on top of JAI interfaces • Replaces most common JAI operations • Open Source (Apache 2.0) • Pure Java and High Performance • Support for No-Data • Support for Processing ROI • Several fixes compared to JAI • Support for Band Masks JAI-Ext JAI https://github.com/geosolutions-it/jai-ext FOSS4G 2015, Seoul 14th-19th September 2015

  7. JAITools • High performance raster processing • ExtendsJAI with more operations • Open Source, BSD license • Low Level Operations, e.g. RangeLookup • Higher Level Operations • Vectorize, Contour • Raster algebra (Jiffle) https://github.com/mbedward/jaitools FOSS4G 2015, Seoul 14th-19th September 2015

  8. Jiffle • Raster algebra languagebased on JAITools • Can be exposedas WPS https://github.com/mbedward/jiffle FOSS4G 2015, Seoul 14th-19th September 2015

  9. JAI - ImageIO • SUN then Oracle Image I/O library • Partly ships with JDK partly as extension • JAI bridge for tile-based, deferred data reading • Easily Extensible • Natively Accelerated Code available for many formats • No source code for native (de)coders • Development more or less stopped! FOSS4G 2015, Seoul 14th-19th September 2015

  10. ImageIO-EXT • Extends, complements, replaces Oracle JAI ImageIO Library • Open Source, LGPL and BSD licenses • Plugins: • BigTiff*, MatFile 5, TurboJPEG • JP2000 (Kakadu) • Fast PNG encoder • GDAL integration: JPEG2000, MrSID, ECW, BigTIFF, ERDAS Image, HDF4, … ImageIO-Ext ImageIO https://github.com/geosolutions-it/imageio-ext FOSS4G 2015, Seoul 14th-19th September 2015

  11. GeoTools • Adds the geography on top of the imagery • Representation of georeferenced grids • Reading and writing georeferenced formats • Rendering (colormap, contrast stretch, hillshade, transform, …) • Reprojection • Operations in geographic space • Process API and implementations ready to be used by WPS http://www.geotools.org http://github.com/geotools/geotools FOSS4G 2015, Seoul 14th-19th September 2015

  12. GeoServer • Adds the network protocols on top of the georeferencedrasters: • WMS and WMTS to view • WCS to download • WPS to process http://www.geoserver.org http://github.com/geoserver/geoserver FOSS4G 2015, Seoul 14th-19th September 2015

  13. Recent Achievements: JAI-EXT FOSS4G 2015, Seoul 14th-19th September 2015

  14. JAI-EXT improvements • QA and performance tuning underway • Mosaic images in different color models • Positive reports are flowing in. From the user mailing list: … JAI-Ext is giving me a >12x speed increase w/ warp transforms and bicubic interpolation against GridCoverages with floating point data types. …. Actually in preparing my report to the team I crunched the numbers and we're actually seeing tiling throughput improvements of: NEAREST by 3xBICUBIC by 21xBILINEAR by 68x Given our raster ingest rates of 30 Gpbs, this is significant FOSS4G 2015, Seoul 14th-19th September 2015

  15. JAI-EXT integration • GeoTools 14.0 and GeoServer 2.8.0 • JAI-EXT available on demand for the moment, add this system variable: -Dorg.geotools.coverage.jaiext.enabled=true • Still have to work out a few integration issues, should become active by default in the next few months FOSS4G 2015, Seoul 14th-19th September 2015

  16. Benefits of JAI-EXT integration • End to end NODATA support (scientific data anyone?) • Region Of Interest (ROI, raster mask) full support in all operations • Heterogeneous mosaic support: mix images in gray 8 and 16 bit, RGB in the same mosaic • Bug fixes over JAI • Speedups in certain operations FOSS4G 2015, Seoul 14th-19th September 2015

  17. Recent Achievements: Raster data masking FOSS4G 2015, Seoul 14th-19th September 2015

  18. GeoTools Vector mask support • Sidecar shp/wkt/wkb file with the valid area • Or single shapefile for the whole mosaic • Trouble: the vector rescales linearly, the raster does by the unit (cannot have 1/2 of a pixel, you know?) FOSS4G 2015, Seoul 14th-19th September 2015

  19. GeoTools Raster mask support • Support for GDAL external and internal masks • Binary images telling where the data is actually valid • One mask per overview • Very important for data compressedwith lossy compressions • The mask can be compressed too (DEFLATE, non lossy) FOSS4G 2015, Seoul 14th-19th September 2015

  20. Recent Achievements: Metoc specific FOSS4G 2015, Seoul 14th-19th September 2015

  21. MetOC: support for 0/360 rasters • In Meteorology and Oceanography, rasters with longitude between 0 and 360 are common • This is the data crossing the dateline (not request) • Improved support for displaying and re-projecting them Dateline FOSS4G 2015, Seoul 14th-19th September 2015

  22. Support for custom NetCDF projections • Added support for reading custom projections out of NetCDF and GRIB files • Register them in: $GEOSERVER_DATA_DIR/user-projections/netcdf.projections.properties • Usual WKT syntax 971801=PROJCS[“lambert_conformal_conic_1SP”, GEOGCS[“unknown”, DATUM[“unknown”, SPHEROID[“unknown”, 6371229.0, 0.0]], PRIMEM[“Greenwich”, 0.0], UNIT[“degree”, 0.017453292519943295], AXIS[“Geodeticlongitude”, EAST], AXIS[“Geodeticlatitude”, NORTH]], PROJECTION[“Lambert_Conformal_Conic_1SP”], PARAMETER[“central_meridian”, -95.0], PARAMETER[“latitude_of_origin”, 25.0], PARAMETER[“scale_factor”, 1.0], PARAMETER[“false_easting”, 0.0], PARAMETER[“false_northing”, 0.0], UNIT[“m”, 1.0], AXIS[“Easting”, EAST], AXIS[“Northing”, NORTH], AUTHORITY[“EPSG”,”971801”]] FOSS4G 2015, Seoul 14th-19th September 2015

  23. Support for custom NetCDF projections FOSS4G 2015, Seoul 14th-19th September 2015

  24. WCS NetCDF output improvements • Support for CF standard variablenames • Custom data packing • UOM conversion • Attributes FOSS4G 2015, Seoul 14th-19th September 2015

  25. Recent Achievements: Odds and ends FOSS4G 2015, Seoul 14th-19th September 2015

  26. Raster advanced projection handling • Improved support for requests crossing the dateline • Improved support for difficult projections FOSS4G 2015, Seoul 14th-19th September 2015

  27. Contrast stretch enhancement • Extensions to SLD and CSS • Extra params to control the stretch algorithm • Setup to be extended in the future <sld:RasterSymbolizer> <sld:ContrastEnhancement> <sld:Normalize> <sld:VendorOptionname="algorithm"> StretchToMinimumMaximum/ClipToMinMaximum /ClipToZero </sld:VendorOption> <sld:VendorOptionname="minValue">50</sld:VendorOption> <sld:VendorOptionname="maxValue">800</sld:VendorOption> </sld:Normalize> </sld:ContrastEnhancement> </sld:RasterSymbolizer> http://docs.geoserver.org/latest/en/user/styling/sld-reference/rastersymbolizer.html#contrastenhancement FOSS4G 2015, Seoul 14th-19th September 2015

  28. Contrast stretch enhancement StretchToMinMax Clip FOSS4G 2015, Seoul 14th-19th September 2015

  29. What’s cooking FOSS4G 2015, Seoul 14th-19th September 2015

  30. Hillshading • The one SLD 1.0 feature we were still missing • Did not make the GT 14.x/GS 2.8.x feature freeze, may be backported later <RasterSymbolizer> <ColorMap> <ColorMapEntry color="#000000" quantity="-32636" opacity="0" /> <ColorMapEntry color="#000080" quantity="-20" /> <ColorMapEntry color="#00BD62" quantity="30" /> <ColorMapEntry color="#98FB98" quantity="200" /> <ColorMapEntry color="#FBFE80" quantity="400" /> <ColorMapEntry color="#EDA765" quantity="1800" /> <ColorMapEntry color="#D9925D" quantity="4000" /> <ColorMapEntry color="#FFFFFF" quantity="5000" /> </ColorMap> <ShadedRelief> <ReliefFactor>20</ReliefFactor> <BrightnessOnly>false</BrightnessOnly> </ShadedRelief> </RasterSymbolizer> FOSS4G 2015, Seoul 14th-19th September 2015

  31. Hillshading FOSS4G 2015, Seoul 14th-19th September 2015

  32. Full JAI replacement • JAI interfaces and base infrastructure are not yet replaceable • Yet, they are very old code, we would like to have a fresh start based on what we have in JAI-EXT • Trying to get funds to get there, anyone here interested in helping? FOSS4G 2015, Seoul 14th-19th September 2015

  33. That’s all folks! Questions? info@geo-solutions.it FOSS4G 2015, Seoul 14th-19th September 2015

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