What's new in Geoserver 2.17?

GeoServer 2.17 was released in April 21st 2020. In this webinar you will learn about MBStyles support, vector tiles, improved security, map rendering advancement, GeoWebCache performance improvement, and more.

Transcript

1. Andrea Aime
   GeoSolutions
   What's new in Geoserver
   2.17.0?
   

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2. Quick overview
   

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3. GeoServer 2.17.0
   ⚫
   Released April 21st 2020 along with GeoTools 23.0
   ⚫
   First release of the 2.17.x series
   ⚫
   2.17.x get 5 more releases
   ⚫
   In "stable status" until September 2020, with some new features getting
   backported
   ⚫
   In "maintenance" status until March 2021, mostly with bug fixes
   ⚫
   Can run on Java 8 or Java 11
   

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4. GeoServer 2.17.0 - extensions
   

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5. GeoServer 2.17.0 - community
   https://build.geoserver.org/geoserver/2.17.x/community-latest/
   

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6. Map rendering news
   

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7. Mapbox GL Styles plugin
   ⚫
   Can apply Mapbox GL styles server side
   ⚫
   Graduated from community to extension status
   ⚫
   Use cases:
   ⚫
   Re-use existing Mapbox GL styles on the server side
   ⚫
   Edit styles with external editor (e.g., Maputnik)
   ⚫
   Setup a hybrid rendering solution
   GeoServer
   Data
   Mapbox
   GL
   Classic OGC
   client
   Mapbox
   client
   WMTS/PNG
   WMTS/MVT
   

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8. Mapbox GL Styles plugin
   ⚫
   Received significant QA work, 18 tickets resolved
   ⚫
   Increased rendering fidelity (e.g. better match of
   zoom related functions, improved font matching)
   ⚫
   Increased behavior match (e.g. icons and labels
   showing up together, or disappearing together)
   

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9. Mapbox GL Styles plugin
   ⚫
   Example rendering OpenMapTiles GL Bright
   

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10. Map engine improvements
    ⚫
    The Mapbox GL work required new functionality,
    made available in all style languages.
    ⚫
    Other functionalities added as well, independent
    of the Mapbox GL work
    ⚫
    In particular:
    ⚫
    Background fill
    ⚫
    Associate symbol with label, make them show either together, or
    none
    ⚫
    Automatic font shrinking to fit labels in polygons
    ⚫
    Drape symbol along a line (vs just repeating it)
    

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11. Background fill
    ⚫
    Specify a "fill" at the SLD UserStyle level, fills the
    background of the map
    

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12. Offset label shield
    ⚫
    Label shield functionality allows to center a label
    and a background graphic.
    ⚫
    Meant to be used for road shields
    ⚫
    New "graphicPlacement" vendor option
    ⚫
    "label" centers with the label
    ⚫
    "independent" centers with the original point +
    offset/anchor
    ⚫
    Allows to setup point/label combos that are
    stacked, and yet display as a single entity
    

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13. Offset label shield
    Label/icon disappearing due to
    conflict resolution, road names
    having higher priority
    name="graphicPlacement">
    independent
    
    

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14. Auto-shrink polygon labels
    ⚫
    Make an effort to fit labels inside polygons
    ⚫
    Shrink them down to a min target size, rather
    than making them overflow or disappear
    

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15. Auto-shrink polygon labels
    
    
    label
    
    
    Bitstream Vera Sans
    16
    
    
    
    
    0.5
    0.5
    
    
    
    6
    1
    
    

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16. Drape line symbol along a line
    ⚫
    LineSybolizer allow to repeat a symbol along a line
    ⚫
    The result is normally dis-continuous at line
    vertices
    markAlongLine=true markAlongLine=false
    

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17. Drape line symbol along a line
    
    
    
    
    
    
    
    wkt://LINESTRING (0 0, 0 -0.5, 0.5 -0.5, 0.5 0.5, 1 0.5, 1 0)
    
    
    0xFF0000
    
    2
    round
    
    
    20
    
    
    
    true
    
    

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18. Data sources and formats
    

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19. Mbtiles + Vector tiles data source
    ⚫
    A MBTiles file is a SQLite tile storage
    ⚫
    One main table called "tiles"
    ⚫
    One support table called "metadata"
    ⚫
    Limited to the web Mercator tile matrix set
    ⚫
    Tiles can be filled with images, but also with
    Mapbox Vector Tiles (MVT)
    ⚫
    The metadata table provides, among others, a
    schema for them
    CREATE TABLE tiles (zoom_level integer, tile_column
    integer, tile_row integer, tile_data blob);
    CREATE TABLE metadata (name text, value text);
    

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20. MBTiles + Vector tiles data source
    ⚫
    Multiple layers contained in a single tile
    ⚫
    Polygons/lines split among tiles
    ⚫
    Clients typically
    don't stitch back
    data (expensive)
    ⚫
    Each tile contains a
    buffer of extra
    data around to
    avoid rendering
    artifacts
    https://blog.cyclemap.link/2020-01-25-tilebuffer/
    

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21. MBTiles + Vector tiles data source
    ⚫
    The store provides access to the layers separately
    (usual data model for GeoServer)
    ⚫
    Rendering OpenMapTiles data + MB GL Styles
    

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22. WMS cascading improved
    ⚫
    Choose which remote
    styles to use and expose
    ⚫
    Choose format used for
    cascading
    ⚫
    Limit cascading to a scale
    range and declared
    BBOX
    

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23. JSON-LD community module
    ⚫
    Generate JSON-LD via templates
    {
    "@context": {
    "gsp": "http://www.opengis.net/ont/geosparql#",
    "sf": "http://www.opengis.net/ont/sf#",
    "schema": "https://schema.org/",
    "dc": "http://purl.org/dc/terms/",
    "Feature": "gsp:Feature",
    "FeatureCollection": "schema:Collection",
    "Point": "sf:Point",
    "wkt": "gsp:asWKT",
    "features": {
    "@container": "@set",
    "@id": "schema:hasPart"
    },
    "geometry": "sf:geometry",
    "description": "dc:description",
    "title": "dc:title",
    "name": "schema:name"
    },
    "type": "FeatureCollection",
    "features": [
    {
    "$source": "gsml:MappedFeature"
    },
    → Continued in next slide
    

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24. JSON-LD community module
    {
    "@id": "${@id}",
    "@type": [
    "Feature",
    "gsml:MappedFeature",
    "http://vocabulary.odm2.org/samplingfeaturetype/mappedFeature"
    ],
    "name": "${gml:name}",
    "gsml:positionalAccuracy": {
    "type": "gsml:CGI_NumericValue",
    "value": "${gsml:positionalAccuracy/gsml:CGI_NumericValue/gsml:principalValue}"
    },
    "gsml:GeologicUnit": {
    "$source": "gsml:specification/gsml:GeologicUnit",
    "@id": "${@id}",
    "description": "${gml:description}",
    "gsml:geologicUnitType": "urn:ogc:def:nil:OGC::unknown",
    "gsml:composition": [
    {
    "$source": "gsml:composition"
    },
    {
    "gsml:compositionPart": [
    {
    "$source": "gsml:CompositionPart"
    },
    {
    "gsml:role": {
    "value": "${gsml:role}",
    "@codeSpace": "urn:cgi:classifierScheme:Example:CompositionPartRole"
    },
    ……….
    

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25. Service news
    

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26. OGC API – Marching on!
    ⚫
    The OGC API community
    modules keep
    improving:
    ⚫
    Updated OGC API -
    Features API to latest
    spec
    ⚫
    Added filtering and
    CRS extensions
    ⚫
    OGC API – Tiles
    ⚫
    OGC API – Styles
    

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27. FlatGeoBuf community module
    ⚫
    FlatGeoBuf is "a performant binary encoding for
    geographic data based on flatbuffers …"
    ⚫
    WFS (OGC API – Features) output format
    ⚫
    New community module
    ⚫
    Performance comparison, shapefile as reference
    

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28. GeoWebCache
    

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29. Faster startup
    ⚫
    30% faster GWC layer loading during startup
    ⚫
    Improved CPU consumption
    ⚫
    Test loading 1 million layers, with 1 million
    cached layers associated, over the past releases
    Version Released Startup GWC_startup
    2.14.4 2019-06-13 9m 5s 39s
    2.15.0 2019-02-27
    2.15.2 2019-06-28 6m 45s 40s
    2.16.0 2019-09-18 6m 05s 34s
    2.16.2 2020-01-20 6m 45s 34s
    2.17.0 2020-04-19 6m 33s 22s
    Data courtesy of Gabriel Roldan
    

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30. Faster tile layer listing
    ⚫
    The tile layer page could get pretty slow
    ⚫
    Sped up by orders of magnitude in 2.17.0
    

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31. Configure XYZ layout on disk
    ⚫
    GWC disk layout is optimized to keep directory
    listings short, but cannot be used to setup a
    static tile cache
    ⚫
    In 2.17.0 one can create
    a ZYX/Z(-Y)X layout,
    seed it, and move to
    static file serving
    

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32. More tolerant seed
    ⚫
    Traditionally GWC seeding threads would stop at
    the first map building error encountered. Now
    tolerance can be configured on a per job basis.
    

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33. Configuration improvements
    

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34. Resource browser extension
    ⚫
    Access contents of the data directory directly
    from the GUI
    ⚫
    Useful for remote servers, mandatory if one is
    not storing the config on the file system
    

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35. Edit security from resource pages
    ⚫
    Alternative focus on the single resource, rather
    than the full set of security rules
    

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36. Track last resource change
    ⚫
    Ever wondered if
    "something
    changed"?
    ⚫
    Now you can check.
    

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37. Custom dimensions for vector layers
    ⚫
    WMS dimension
    ⚫
    Time
    ⚫
    Elevation
    ⚫
    Custom
    ⚫
    Custom used to be
    supported by raster data
    only
    ⚫
    Now supported by vector
    data too
    

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38. Enabled/advertised for Groups
    ⚫
    Enabled/advertised controls were available for
    layers only
    ⚫
    Now available for layer groups too
    

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39. That’s all!
    https://www.geosolutionsgroup.com/contacts/
    

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