[mapserver-users] Rasters and WFS

SixDegrees paulcarlisle at comcast.net
Thu May 19 15:36:17 EDT 2011


I am very new to GIS software. We are developing an application that will use
both QGis and/or a web browser as the front end. Basically, we have large
image files we will be sending as a background layer, and we want to overlay
them with points having various attributes. The user should be able to click
on each of the points and read off that point's attributes.

This works well if we load our background image through a WMS layer and load
the points via a shapefile as a vector layer in QGis; points are displayed
atop the image and are clickable, bringing up a table of attributes for the
selected point.

In QGis, at least, adding the shapefile to the WMS mapfile does not permit
clicking on points in the UI. It is not possible for the user to obtain
shapefiles locally, so we need a solution that will allow both sets of
information to be sent through a web service.

Will WFS allow raster images to be embedded? Documentation seems to indicate
not, but isn't quite clear.

We can insist that the user open both a WMS and WFS layer, but this gets
messy; we would really prefer a single data stream solution.

A browser-based solution seems feasible with WMS, based on the quick trip
I've taken through MapServer tutorials. Our customers, however, are
comfortable with QGis and strongly prefer that option as an interface.

Any thoughts would be appreciated.


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