Tom, Thanks for your reply. I am using WFS 1.1.0 and and GML 2. I am using OpenLayers 2.12, and on the server I am using GeoServer 2.2.4. The WMS layer that I am accessing is in shapefile format, and is in EPSG:4326. The data, server, etc. are all ours. The original question that I had was when the WMS layer is accessed using a select control, the features are returned in GML format with the longitude first, and then the latitude. When the same layer is accessed using a filter to select only features with a specific attribute value, the features are returned in GML format with the latitude first, and then the longitude. I am fairly new to OpenLayers and GeoServer, so I presumed that I must be doing something wrong for the coordinates of the same feature to be returned in reverse order. I will try using WFS 1.0 and see what happens.
I appreciate the information. Thanks. -----Original Message----- From: openlayers-users-boun...@lists.osgeo.org [mailto:openlayers-users-boun...@lists.osgeo.org] On Behalf Of Tom Kunicki Sent: Monday, March 11, 2013 5:14 PM To: undisclosed-recipients: Cc: OpenLayers User List Subject: Re: [OpenLayers-Users] Coordinates Reversed To help it would be useful to know the WFS version and server-side vendor and implementation you are attempting to utilize. The easiest thing would be to use WFS 1.0 with GML2. You'll (usually) get back geographic coordinates in [lon, lat] The longer gist-of-it-but-skipping-details explanation: There's some ambiguity as to what the axis ordering should be. Computer-folk tend to prefer [x, y] or [lon, lat] and this was how the computer-folk implemented these services for a long time. The reality is that the authorities that define the coordinate systems (i.e. the "EPSG" in "EPSG:4326") define the proper axis order for coordinates. As an example for EPSG:4326 the authority defined axis order is [lat, lon] == [y, x] == [north, east]. The purists brought up this discrepancy and in 2009 the OGC put forth this guidance note: http://www.ogcnetwork.net/node/491. What this says that any specification generated after 2009 (and implementations of those specifications) must respect the authority defined axis order (i.e. [lat, long] not [lon, lat]). Now this is all muddled because vendors have put forth varying degrees of compliance in the implementations of these newer services. There a number of nuances to all of this and it's usually easier (if possible) to use servi ces that pre-date the 2009 upheaval (where everything was in the incorrect, but consistent axis order). Tom _______________________________________________ Users mailing list us...@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/openlayers-users
