We at Ionic Enterprise have been working on an OpenLayers based client
that is builds on top of our RedSpider Enterprise product. A
demonstration version of this application can be found here:
http://demo.ionicenterprise.com/jeffpaic/openlayers1.jsp
By combining the power of OpenLayers 2.4, RedSpider Enterprise 3.4.1,
and some custom code we can do a number of things that the OpenLayers
2.4 relase can not do on its own. With this application, the user can:
* load and save OGC Web Map Contexts
* reorder layers on the fly
* access WFS via the web application side (not browser side). This
means:
o no need for proxying to access non-local services
o WFS layers can be rendered as images in addition to as SVG
(note that IONIC WFSs are also WMSs and rendering them as
WMS is faster than rendering them as WFS)
o WFS layers with enumerations will show dropdown lists of
their values
* use OGC filters to bring in a subset of the features from a WFS
* create or select WFS features
o view and update the attributes
o digitize and/or edit
point/line/polygon/multipoint/multiline/multipolygon with
inner rings
* We also have a demonstration of working with WMS with the temporal
dimension, but due to resources constraints, we can not leave the
live demonstration up 24/7.
There is a lot going on with this application so it might not be
completely intuitive at first. You can use the GetFeatureInfo tool to
figure out what lies beneath a point or bounding box on the map. From
there you can select a feature if there are any. You can also use the
select tool to select a feature directly. Once a feature is selected,
you can view and update its attributes. Play around with the "BUSINESS"
WFS layer or add your own WFS. When digitizing a geometry, you have to
start an edit with the "New" button and stop the edit with the little
checkmark icon. If just editing a geometry after selecting it, just
drag the vertices into place. If any change has been made, you should
be able to submit the edit, updating the WFS and forcing the layer to
refresh. I am using a boring base map, but you can add your own. You
can even add a WFS layer as a basemap, though that would be weird.
I do not know how the OpenLayers decisionmakers feel about posting web
applications so largely based on non-OpenLayers technology on the demos
page, but it is my personal opinion is that demonstrating the use of
OpenLayers as a user interface for a proprietary application is a good
thing for all involved. We are also interested in submitting our
modified geometry editing code back to the project, but our recent
acquisition by Leica is slowing down the participant agreement process.
I hope some of you find this interesting.
Regards,
Jeff
begin:vcard
fn:Jeff Yutzler
n:Yutzler;Jeff
org:IONIC Enterprise, Inc.
adr;dom:Suite 300;;901 N. Pitt St.;Alexandria;VA;22314
email;internet:[EMAIL PROTECTED]
title:Senior Geospatial Systems Engineer
tel;work:(703) 535-5973X17
tel;fax:(703) 535-5975
tel;cell:(703) 981-8753
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version:2.1
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