RE: [Geoserver-users] KML output into GE via Geoserver

GeoServer GeoServer User
1

Hey guys,

Thanks for the patch Chris, there are still some niggling issues which I will try to look at soon.

I understand where you guys are coming from re: sponsorship of the KML stuff so I’m a bit hesitant at logging too many bugs …

  1. ArcSDE datastores keep throwing “Error building SeFilter” exceptions when requesting KML no matter how simple the SLD is.

  2. The patch didn’t fix all issues (See attached). I haven’t looked at the KML code but its pushing out duplicate geometry for each feature (But hey, the labels work!) J

This was a quick 2 minute test, so apologies on the lack of detail. Has Jorn taken over the KML stuff or is it still a free for all as far as patches are concerned for the KML writer?

Cheers,

Chris Tweedie

-----Original Message-----
From: geoserver-users-admin@lists.sourceforge.net [mailto:geoserver-users-admin@lists.sourceforge.net] On Behalf Of Chris Holmes
Sent: Thursday, 16 March 2006 12:26 AM
To: Doug Fils
Cc: Geoserver-users@lists.sourceforge.net
Subject: Re: [Geoserver-users] KML output into GE via Geoserver

Doug Fils wrote:

All,

Been mostly a lurker on the site but we (http://www.chronos.org)

have installed and set up Geoserver as our WMS/WFS solution.

With the help of Chris Tweedie (thanks Chris) I got the URL to our

geoserver working with returning GE output.

ref:

http://services.chronos.org:9090/geoserver/wms?service=WMS&version=1.0.0&request=GetMap&format=application/vnd.google-earth.kml+XML&width=500&height=500&srs=EPSG:4326&layers=chronos:diatoms&styles=blue_point

When I run it I get the results… but now I have some questions.

  1. All the points are unlabeled, is there a way for me to pull some

data from a table in our postgis db and attach to a label name for

these points? Is this what entry:

http://jira.codehaus.org/browse/GEOS-537 regarding place names is about?

I think so. I just built geoserver with the patched file, could you

go to the issue again and download the attached geoserver.jar? Let me

know if it works…

  1. How do I associate data from the database into a WFS or KML output?

In the attached screen shot from that feature setup in geoserver I see

all the genus and species data with a point. (This is ocean drilling

data). I would love to see that in the white pop box in GE. Is

there something I am missing, is that related to the schema base

entry? I assume there is a link between this question and the place

name issue in item (1)?

Yes, 1) must be working properly for this to display correctly. To get

in to WFS you don’t need to do anything, all attributes are returned by

default. To get it in KML (which is generated by the WMS) you need to

make the appropriate ‘label’ in SLD. If you get the latest udig (1.1M6)

from http://udig.refractions.net you can use it to customize your SLD

with a nice gui, and then export it and upload it to GeoServer. The

lable should then be rendered in WMS, and in KML if that patch works.

Note I could only get the label working with one field at a time, but I

think it’s supposed to support more.

All the data now is Ocean based, but soon we will have GSSP markers

and asteroid impact data on-line as well, so it would be great to be

able to get this data into GE for example.

Cool. The GE support is still young, and there are some concrete things

that need to be fixed. We’ve estimated about 8 days work to get the KML

stuff up to snuff, and streaming with KMZ, which we’re not planning to

do immediately unless we can scare up a bit of funding. But reporting

bugs like this helps us know what needs to be done.

best regards,

Chris

thanks everyone!

doug

–

Chris Holmes

The Open Planning Project

thoughts at: http://cholmes.wordpress.com

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2

Chris Tweedie wrote:

Hey guys,

Thanks for the patch Chris, there are still some niggling issues which I
will try to look at soon.

I understand where you guys are coming from re: sponsorship of the KML
stuff so I'm a bit hesitant at logging too many bugs ..

Oh, don't hesitate to log bugs, having them in the bug tracker is most always helpful. Just include good error reports, ideally with information/data to exactly reproduce the error. Indeed if you can nail down exactly how to replicate it then it eases the programmer's job, and sometimes the answer will just jump right out. So add any and all bugs you find to the tracker, there's no way it hurts, we may just not get to it super soon.

1. ArcSDE datastores keep throwing "Error building SeFilter" exceptions
when requesting KML no matter how simple the SLD is.

Weird. Try to get a stack trace from the logs, and include that in the bug report.

2. The patch didn't fix all issues (See attached). I haven't looked at
the KML code but its pushing out duplicate geometry for each feature
(But hey, the labels work!) :slight_smile:

I'm not sure what I'm looking at in the attached? Is the KML _always_ pushing out duplicate geometries, or just when you have a label declared?

This was a quick 2 minute test, so apologies on the lack of detail. Has
Jorn taken over the KML stuff or is it still a free for all as far as
patches are concerned for the KML writer?

No, he was just evaluating GeoServer as an option to go for funding, and fixed that bug along the way. If they get funding then he'll be able to do real fixes. I really want to see this stuff in, so if I get spare time I may just take a crack at it, especially if you have good bug reports for me, with like data and sld's and whatnot. But lately I'm super swamped and likely will remain so for awhile.

best regards,

Chris

Cheers,

Chris Tweedie

-----Original Message-----
From: geoserver-users-admin@lists.sourceforge.net
[mailto:geoserver-users-admin@lists.sourceforge.net] On Behalf Of Chris
Holmes
Sent: Thursday, 16 March 2006 12:26 AM
To: Doug Fils
Cc: Geoserver-users@lists.sourceforge.net
Subject: Re: [Geoserver-users] KML output into GE via Geoserver

Doug Fils wrote:

All,

  Been mostly a lurker on the site but we (http://www.chronos.org)

have installed and set up Geoserver as our WMS/WFS solution.

  With the help of Chris Tweedie (thanks Chris) I got the URL to our

geoserver working with returning GE output.

ref:

http://services.chronos.org:9090/geoserver/wms?service=WMS&version=1.0.0
&request=GetMap&format=application/vnd.google-earth.kml+XML&width=500&he
ight=500&srs=EPSG:4326&layers=chronos:diatoms&styles=blue_point

When I run it I get the results.. but now I have some questions.

1) All the points are unlabeled, is there a way for me to pull some

data from a table in our postgis db and attach to a label name for

these points? Is this what entry:

http://jira.codehaus.org/browse/GEOS-537 regarding place names is

about?

I _think_ so. I just built geoserver with the patched file, could you

go to the issue again and download the attached geoserver.jar? Let me

know if it works...

2) How do I associate data from the database into a WFS or KML output?

In the attached screen shot from that feature setup in geoserver I see

all the genus and species data with a point. (This is ocean drilling

data). I would love to see that in the white pop box in GE. Is

there something I am missing, is that related to the schema base

entry? I assume there is a link between this question and the place

name issue in item (1)?

Yes, 1) must be working properly for this to display correctly. To get

in to WFS you don't need to do anything, all attributes are returned by

default. To get it in KML (which is generated by the WMS) you need to

make the appropriate 'label' in SLD. If you get the latest udig (1.1M6)

from http://udig.refractions.net you can use it to customize your SLD

with a nice gui, and then export it and upload it to GeoServer. The

lable should then be rendered in WMS, and in KML if that patch works.

Note I could only get the label working with one field at a time, but I

think it's supposed to support more.

All the data now is Ocean based, but soon we will have GSSP markers

and asteroid impact data on-line as well, so it would be great to be

able to get this data into GE for example.

Cool. The GE support is still young, and there are some concrete things

that need to be fixed. We've estimated about 8 days work to get the KML

stuff up to snuff, and streaming with KMZ, which we're not planning to

do immediately unless we can scare up a bit of funding. But reporting

bugs like this helps us know what needs to be done.

best regards,

Chris

thanks everyone!

doug

------------------------------------------------------------------------

--
Chris Holmes
The Open Planning Project
thoughts at: http://cholmes.wordpress.com