GeoServer Blog

GeoServer 2.15.4 Released

We are pleased to announce the release of GeoServer 2.15.4 with downloads (zip war), documentation (html) and extensions.

This is a maintenance release and is a recommended update for existing installations. This is the last scheduled 2.15 maintenance release and we recommend planning your upgrade to 2.16.

This release is made in conjunction with GeoTools 21.3 and GeoWebCache 1.15.3. Thanks to everyone who contributed to this release.

For more information see the GeoServer 2.15.4 release notes.

Improvements and Fixes

This release includes a number of improvements, including:

  • Improve ncWMS extension to support time list and time range.
  • Truncate of tiles fixed use of parameters.
  • Upgrade of XStream and Jackson libraries.

A number of fixes are also present:

  • Fix cascading WMTS use of credentials
  • ncWMS extension now respects no-data values.
  • Importer fixed to respect shapefile charset encoding.

About GeoServer 2.15 Series

Additional information on the 2.15 series:

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GeoServer 2.16.1 released

We are pleased to announce the release of GeoServer 2.16.1 with downloads (war zip), documentation (html pdf) and extensions.

This is a stable release recommended for production systems.

Note: Our builds detected a change in Oracle JDK 8u221 URL handling; this release was made with 8u202 as a result. Future releases will be made using OpenJDK.

Improvements and Fixes

This release includes a number of improvements, including:

  • The REST API now supports configuring the WMTS
  • New hideEmptyRules LEGEND_OPTION to hide rules not matching any features

Fixes included in this release:

  • SLDService generated raster classifiers are not overwriting the default style any longer
  • Monitoring extension fixed to respect GEOSERVER_AUDIT_PATH setting
  • Cascaded WMTS now makes use of provided credentials

For more information check the 2.16.1 release notes.

Security Updates

Please update your production instance of GeoServer to receive the latest security updates and fixes.

If you encounter a security vulnerability in GeoServer please respect our responsible disclosure policy.

Community Updates

For developers building from source, our community modules are a great place to collaborate on functionality and improvements.

  • ncWMS GetTimeSeries now supports time ranges with period and excludes nodata from results
  • hz-cluster improved synchronization events

About GeoServer 2.16

Features, presentations and reference material on the 2.16 series:

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CITE Test Automation Request for Proposal

GeoServer Project Steering Committee is seeking a solution for automated CITE TEAM Engine tests for

If you or your organization is interested in this work please respond to the geoserver-devel email list with your interest by the end of November. Applicants are welcome to email geoserver-devel list, or attend bi-weekly GeoServer meeting, with any questions or clarifications of requirements.

For details, including detailed requirements, see GSIP-176 fundraising, maintenance activity wiki page, and prior blog post.

Schedule Update: Please email geoserver-devel if you are interested in this activity by the end of November, we will evaluate proposal during GeoServer Meeting December 10th.


There are three approaches discussed:

  • cite command line: our previous scripts made use of a the cite engine to run tests on the command line.
  • cite engine service: The new cite engine has a rest-api, so the testing script could use CURL commands to ask the engine to run the tests
  • cite engine docker: The cite engine is also distributed as a docker image, if that makes it easier to manage the rest-api approach 

Any of these approaches can be viable, or you may have additional ideas. The challenge (after our last experience) is setting up something that can be maintained.


  • The WFS-T tests required a database to run, the tests created a couple of tables each time (since the transaction request modifies the content)

Thanks to sponsors

We would like to thank everyone who has supported this activity via sponsorship and donation. Special thanks OSGeo along with activity sponsors Gaia3D, and OSGeo:UK for help making this possible.

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GeoServer 2.15.3 released

We are pleased to announce the release of GeoServer 2.15.3 with downloads (zip war), documentation (html) and extensions.

This is a maintenance release and is a recommended update for existing installations. This release is made in conjunction with GeoTools 21.3 and GeoWebCache 1.15.3. Thanks to everyone who contributed to this release.

For more information see the GeoServer 2.15.3 release notes.

Improvements and Fixes

This release includes a number of improvements, including:

  • Enhance mongodb schema generation
  • Allow setting Entity Expansion limit on WFS XML Readers
  • Promote authkey to extension (GSIP-174)
  • Make MongoDB App-Schema schema rebuilder endpoints only rebuild schemas present in mappings.
  • Promote status-monitoring module from Community to Extension
  • Upgrade Jetty to 9.4.18.v20190429

A number of fixes are also present:

  • WMS GetFeatureInfo formats text/html, text/plain, text/xml and application/vnd.ogc.gml (GML2) don’t handle time correctly
  • Wrong URL scheme in layer preview (when using HTTPS)
  • GetCapabilities on a single layer fails if a style is duplicated
  • Renaming a layer doesn’t update Data Security rules
  • SLD file renamed with REST PUT request when not needed
  • GeoTIFF sources configured with GeoServer 2.14.x might not work in 2.15.x
  • Style editor extension point not working
  • NullPointerException on WFS ComplexGeoJsonWriter Link check
  • Switching from System Status to Modules tab gives an error.
  • Nodata is not made transparent after channelSelect+contrastEnhancement on multibands dataset
  • WFS GeoJSONBuilder limits max nested level to 20

About GeoServer 2.15 Series

Additional information on the 2.15 series:

Java 11 comparability is the result of a successful code-sprint. Thanks to participating organizations (Boundless, GeoSolutions, GeoCat, Astun Technology, CCRi) and sprint sponsors (Gaia3D, atol, osgeo:uk, Astun Technology).

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GeoServer 2.16.0 released

We are happy to announce the release of GeoServer 2.16.0. Downloads are available (zip and war) along with docs and extensions.

This is a GeoServer release candidate made in conjunction with GeoTools 22.0.

Faster map rendering of complex styles

If you have very complex styles, with lots of rules and complex filtering conditions you’ll be pleased to hear that GeoServer 2.16.x can locate the right symbolizer much quicker than previous versions. This is useful, for example, in the GeoServer home page demo map, rendered from OSM data using a OSM Bright clone built with the CSS module.

The GeoSolutions offices in Massarosa (Viareggio), Italy, in the demo map

Dynamic densification on reprojection

GeoServer has always reprojected data “point by point”, this typically caused long lines represented by just two points to be turn into straight lines, instead of curves, as they were supposed to.

In GeoServer there is a new “advanced projection handling” option in WMS enabling on the fly densification of data, the rendering engine computes how much deformation the projection applies in the area being rendered, and densifies the long lines before reprojection, resulting in eye pleasing curves in output. See a “before and after” comparison here:

Reprojection, original point by point versus densified mode in 2.16.x

EPSG database updated to v 9.6

Thanks to the sponsorship of GeoScience Australia the EPSG database has been updated to version 9.6, including roughly a thousand more codes than the previous version available in GeoServer. The code has also been updated to ensure the NTv2 grid shift files between GDA94 and GDA2020 work properly.

Complex GeoJSON output changes

GeoServer WFS can already output GeoJSON out of complex features data sources (app-schema). However, the output can be less than pleasing at times, the following improvements have been made:

  • The property/element alternation typical of GML is preserved, causing deeply nested and ugly to look structures. Not everyone loves to write a “container.x.x” access to reach the x value, with 2.16.x the output skips one of the containers and exposes a direct “container.x” structure
  • XML attributes are now turned into plain JSON properties, and prefixed with a “@”
  • Feature and data types are not lost anymore in translations, preserved by a “@feaureType” and “@dataType” attributes
  • Full nested features are encoded as GeoJSON again, keeping their identifiers

Thanks to the sponsorship of the French geological survey - BRGM and the French environmental information systems research center – INSIDE, the 2.16.0 output now looks as follows:

  "type": "FeatureCollection",
  "features": [
      "type": "Feature",
      "id": "0001000001",
      "geometry": {
        "type": "Point",
        "coordinates": [51.0684, 1.4298]
      "properties": {
        "@featureType": "Borehole",
        "identifier": {
          "value": "BSS000AAAA",
          "@codeSpace": ""
        "bholeHeadworks": [
            "type": "Feature",
            "geometry": {
              "type": "Point",
              "coordinates": [51.0684, 1.4298]
            "properties": {
              "@featureType": "BoreCollar",
              "collarElevation": {
                "value": -32,
                "@srsName": "",
                "@srsDimension": "1",
                "@uomLabels": "m"


Status Monitoring module promoted to Core

The Status Monitoring module has been promoted to core, and is now included in the GeoServer status page by default!

This module adds a new tab to the Server Status page, with system statistics so that you can monitor the system which GeoServer is running on from the Web GUI.


Authentication key module graduated to extension

The “Authkey” module has been graduated to extension, allowing security unaware applications to access GeoServer. Reminder, in order to keep the system secure the keys should be managed as temporary session tokens by an external application (e.g. MapStore can do this).

PostGIS data store improvements

The PostGIS data store sees a few improvements, including:

  • TWKB encoding for geometries for all WMS/WMTS requests, reducing the amount of data travelling from the database to GeoServer
  • The JDBC driver used to transfer all data as ASCII, the code was modified to allow full binary transfer when prepared statements are enabled (driver limitation, binary can only be enabled in that case)
  • SSL encryption control, the driver defaults to have it on with a significant overhead, if the communication is in a trusted network the encryption can be disabled with benefit to performance
  • Improved encoding of “or-ed” filters, which now use the “in” operator where possible, increasing the likeliness that an eventual index o nthat column will be used
  • Native KNN nearest search when using the “nearest” filter function

OGC/GDAL stores updated to GDAL 2.x

The OGR datastore as well as the GDAL image readers have been updated and now work against GDAL 2.x official binaries, without requiring custom builds any longer.

The OGR datastore can open any vector data source and, in particular, it can use the native FileGBD library when using Windows. It’s also interesting to note that it can open Spatialite files, quite important now that the direct Spatialite store is gone.

Azure GWC blobstore

Tiles can now be stored in Azure blob containers, increasing GWC compatibility with cloud environments, after the already existing S3 support.

A warning though, Azure does not provide, unlike S3, a mass blob delete API, so on truncate GWC will have to go and remove tiles making a DELETE request for each (using parallel requests of course).

SLDService community module graduated to extension

The SLDService community module allowed to generated classified maps of vector data based on criterias such as equal interval, quantiles and unique values.

The same module has now graduated to extension, providing also data filtering based on standard deviation, equal area classification, and offering all the same services on raster data as well (with automatic sub-sampling when the source image is too large).

For example, creating a five classes quantile classification based on states persons over a custom color ramp can be achieved using the following:

<code>curl -v -u admin:geoserver -XGET

New Community Modules

  • WMTS styling module, which adds the ability to get/put a style on a per layer basis using restful resources exposed as ResourceURL
  • OGC API module, including implementations of the new OGC Web APIs for Features, Tiles and Styles (more to come in the upcoming months). Mind, these are cool but also prototypes based on specifications still in draft form, we have warned you, the API will likely have a few rounds of changes still before it stabilizes.
  • MapML community module. See this video for step by step installation instructions.

Other assorted improvements

There are many improvements to look at in the 2.16.0 release notes, as well as in the 2.16-RC release notes. Cherry picking a few, we hav:

  • Integrated GWC fails to seed layers if any data security is configured
  • Default Datastore Parameters panel does not allow https:// protocol values
  • Parameter Extractor plugin cannot mangle URL correctly if Monitor plugin is installed
  • Permit extensibility of Common Formats from Layer Preview page
  • Update name to id in OGC API Collection
  • Add support for configuring ACL in gwc-s3 community module
  • Enhance mongodb schema generation

About GeoServer 2.16

GeoServer 2.16 has been first released in September 2019.

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