[OpenLayers-Users] GML features not lining up in FireFox

Thu May 31 09:40:10 EDT 2007

Slight correction - I meant 2.4

________________________________

From: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org]
On Behalf Of Obe, Regina
Sent: Thursday, May 31, 2007 9:31 AM
To: Christopher Schmidt
Cc: OpenLayers Users
Subject: Re: [OpenLayers-Users] GML features not lining up in FireFox

Chris,

First wanted to thank you again for your help on this.  Switching to
MassGIS WMS Aerial layers helped quite a bit in allowing to zoom in
closer and also highlighting the position  in firefox correctly.  I'm
using 2.5 by the way.

Now I have a couple other issues which I'm not sure the best way to
tackle.

Here are some links for reference
Gif interface
http://dndmaps.cityofboston.gov/mapserv/dnd/htdocs/remsproperty.htm

PNG interface
http://dndmaps.cityofboston.gov/mapserv/dnd/htdocs/remspropertypng..htm
<http://dndmaps.cityofboston.gov/mapserv/dnd/htdocs/remspropertypng.htm>

This is a slightly different project from before, but I'm using
basically the same tricks.

If you type in 
say 18 intervale 
click search and then click on radio button

Problem 1
Then click on a brown outlined parcel - in firefox - quite often it
highlights the whole selected parcel black in both the png and gif
interface.  It doesn't do this in IE 7.
Less often but sometimes in firefox when you select an aerial layer for
display - it turns the view port black.  I haven't been able to
replicate this issue with the PNG interface.

Problem 2
The png interface doesn't really work in IE 6.   I know IE 6 doesn't
really understand transparent PNGs and from a quick glance of the Open
Layers code (I forget where) - it looks like there is a hack in place to
compensate for that, but in all my efforts, I've never been able to get
this to work in IE6.  
Is the only way to combat this to just check if the version of IE being
run is less than 7 use GIF layers and otherwise use PNG, or is there a
more elegant solution to that.

Thanks,
Regina

________________________________

From: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org]
On Behalf Of Obe, Regina
Sent: Friday, May 18, 2007 9:35 AM
To: Christopher Schmidt
Cc: OpenLayers Users
Subject: Re: [OpenLayers-Users] GML features not lining up in FireFox

Chris,

No problem.  I just wanted to make sure I wasn't missing anything.  I'll
pursue using the other WMS layers.  If it would help for me to test out
the FF branch you have, I would be happy to do so.

Thanks for a great product,
Regina

________________________________

From: Christopher Schmidt [mailto:crschmidt at metacarta.com]
Sent: Fri 5/18/2007 9:21 AM
To: Obe, Regina
Cc: OpenLayers Users
Subject: Re: [OpenLayers-Users] GML features not lining up in FireFox

On Fri, May 18, 2007 at 07:32:42AM -0400, Obe, Regina wrote:
> I have a map that displays a Mapserver WMS of Abandoned property
points
> and when the user clicks on a red dot, it queries the WFS service to
get
> the detail of that section and overlays the WFS points as an extra
> layer.
> 
> In IE 7, my WMS and WFS line up perfectly, but in Firefox, the WFS
seems
> a bit skewed off the mark.  Am I doing something wrong or is this a
> known issue.
> 
> I'm using the OpenLayers version in CVS.
> 
> Below is the link to my map.
> 
> http://www.cityofboston.gov/dnd/AbandonedPrivateMap.aspx

The short answer is "You can't do that", unfortunately. Using
the commercial layers as a base layer for WFS is not something that
works in 2.4. WE're currently working on a couple of different solutions
for this to be brought in after 2.4.

Since you're in Massachusetts, depending on the type of information
you're interested in from the maps, you may have o ther options for
mapping -- the boston freemap, http://boston.freemap.in/ , offers decent
quality road maps and supports a number of different projections, so you
could use that as a base map instead. (I can help with that if need be.)

If it's important to you to use commercial base layers, I have a branch
of OpenLayers which will work in FF with the commercial base layers,
however, I haven't yet made the neccesary changes to to the VML layer.

So, you have a couple options:
 * Pursue using a WMS-basemap, via the Boston Freemap, or directly from
   MassGIS. (I can help with this.)
 * Wait for future developments which allow this usage.
 * Investigate using the SVG branch I talked about -- this one probably
   only makes sense if you have someone skilled in Javascript that you
   can talk to (whether that's you or someone else).

I'm sorry for any inconvenience this may cause.

Regards,
--
Christopher Schmidt
MetaCarta

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________________________________

The substance of this message, including any attachments, may be
confidential, legally privileged and/or exempt from disclosure pursuant
to Massachusetts law. It is intended solely for the addressee. If you
received this in error, please contact the sender and delete the
material from any computer. 

-----------------------------------------
The substance of this message, including any attachments, may be
confidential, legally privileged and/or exempt from disclosure
pursuant to Massachusetts law. It is intended
solely for the addressee. If you received this in error, please
contact the sender and delete the material from any computer.
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