Archive for the 'Java' Category

CBSviewer, an accessible, open standards based webmap viewer

The past months I’ve been busy developing a webmapping application together with Statistics Netherlands to replace their current offerings of webmapping such as CBS in uw Buurt which have various accessibility issues and has Google looking in over your shoulder. The new application can be used with both the keyboard and a mouse and  and will fallback to a non CSS and/or non Javascript version if needed (or requested) by the user providing a much better experience.

Key features of the application are:

  • open standards based interfaces (WMS, WMTS, OpenLS LUS and WCAG)
  • easy modification using maven war overlay techniques (as example you can look into the NOKviewer project)
  • easy to localize using property files / resource bundles for all the text
  • easy to configure thematic maps using a set of xml files
  • easy styling adjustments using Sass and modular CSS

The project builds on well documented, well supported and proven open source libraries such as GeoTools, OpenLayers, jQuery and jQuery UI.

We’re not quite there yet but you can follow the progress of the project through the Github site: http://mineleni.github.io/CBSviewer/ [Dutch]

GEOZET: Building a dual-mode GIS webapp

Within the GEOZET viewer project a dual mode GIS webapp is being developed by Geonovum as one of the launching products of the PDOK program. Dual mode in this case being on the one hand a rich”, map enabled client/GUI and on the other hand a lean non-javascript, non-css client/GUI for cases like screenreaders.
Bart has written about the OpenLayers based “rich” client in his posts, I’m working on the “core” version, that this post is about. Continue reading ‘GEOZET: Building a dual-mode GIS webapp’

Creating a Java ArcGIS Server Object Extension to access metadata through a mapservice

So with this cool Server Extension technology being possible with ArcGIS server java ed. 9.3.1 and me finally having time to have a play with it I decided on doing something useful; getting at the metadata of the data within a mapservice. Continue reading ‘Creating a Java ArcGIS Server Object Extension to access metadata through a mapservice’

ArcGIS Server java ed. exposes tomcat manager webapp with well know user credentials

This article concerns the ESRI ArcGIS Server java ed. versions 9.3 and 9.3.1 and possibly others.

ArcGIS Server 9.3sp1 and 9.3.1 expose the Tomcat html manager application; this in itself is not a bad thing if the user would be aware of the consequences and if the credentials which would be necessary to obtain access were not public knowledge [KB 37134 , KB 37147].
Neither of these conditions are met, causing a situation where the management of the built-in tomcat servers is open for anyone interested; you cannot get an easier way to launch a DoS attack. Essentially this makes the product unfit for deployment in the enterprise. Continue reading ‘ArcGIS Server java ed. exposes tomcat manager webapp with well know user credentials’


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