WWSK 0.3.1
Pre-release
Date
28-JUL-2017
Release Summary
WWSK v0.3.1 is a hot fix that addresses the loss of fidelity in imagery exported to GeoPackages from the GeoServer Layer Preview .
The previous versions of WWSK the Layer Preview | GeoPackage export imposed a constraint on the number of levels exported (4). This constraint prevented GeoPackage exports from taxing the server with lots of WMS requests needed the for higher zoom levels. With this constraint removed, higher resolution levels can be generated, but it introduces the liability of overloading the server with an enormous number of tile requests.
To mitigate against this risk, consider enabling MIME type checking in the WMS Service settings and do not include the application/x-gpkg in the list of allowed MIME types.
Also, consider WPS as alternative to exporting to GeoPackages via the Layer Preview and WMS. WPS GeoPackage export offers greater control over the contents of the generated GeoPackage. Refer to GeoPackage As Output | GeoPackage WPS Process documentation for more information.
Note: The constraint on the number of levels generated in the Layer Preview / WMS export could be reimposed in a future release. The WPS export is not affected by this constraint
Associated GitHub Issues
| No. | Description | Type |
|---|---|---|
| #75 | GeoPackages exported from Layer Preview do not have same fidelity as source imagery | bug |
Known issues
| No. | Description | Type |
|---|---|---|
| N/A |
Impacts to other development teams/compatibility
N/A
Versions
| Component | Version | Previous |
|---|---|---|
| GeoServer | 2.11.1 | |
| GeoTools | 17.1 | |
| GeoWebCache | 1.11.0 | |
| ImageIO-Ext | 1.1.17 | |
| JAI-Ext | 1.0.13 | |
| Jetty | 9.2.13.v20150730 |
End User impact/User facing changes
Exporting to a GeoPackage is a user facing feature that does not require a login. To mitigate the risk of an overburdened server, consider enabling MIME type checking in the WMS Service settings.
Documentation
See the README, GeoServer, GeoPackage and GDAL Image Formats documentation.
Logs
Location of all log files and any special documentation regarding the logging for this component.
Test Tools
Location of any test tools and any brief instructions on how to use them.
Install/Update/Removal
Install
WWSK is installed by simply unzipping a platform specific distribution to a folder on a target computer.
Removal
WWSK is removed by simply deleting the folder in which it was installed. If a wwsk.service has been created (Linux), it should be stopped, disabled and removed.
Update
The recommended practice for updating WWSK is to:
- Install a new version of WWSK alongside an older version,
- (Optionally) copy/move data and workspaces from the old version to the new version,
- Remove the old version.
Updating WWSK by unzipping a distribution into an existing WWSK instance has not been tested and is not recommended.
Notes
Additional notes, links, and information goes here.