[OpenLayers-Dev] OL-Based GeoEditor

[Burgholzer,Robert]

Sorry to delay the response, I have been offline for a few days.

The reason I sent the PG thread was that I thought that it would be easier to use that method to split the line, since select-feature.html has the "select" part, and the "draw a line" part.  Then, using the pg function, you could manage the "split" part.  

Robert W. Burgholzer
Surface Water Modeler
Office of Water Supply and Planning
Virginia Department of Environmental Quality
rwburgholzer at deq.virginia.gov
804-698-4405
Open Source Modeling Tools:
http://sourceforge.net/projects/npsource/

-----Original Message-----
From: Eric Lemoine [mailto:eric.c2c at gmail.com] 
Sent: Monday, June 16, 2008 5:30 PM
To: Dipl. Inf. Carsten Eider; Burgholzer,Robert; users at openlayers.org; dev at openlayers.org
Subject: Re: [OpenLayers-Dev] OL-Based GeoEditor

Hi. Have you tried using two select feature control instances, one
with geometryType set to polygon and one with geometryType set to
point. Just a guess, i've never tried this myself. Cheers. Eric

2008/6/16, Dipl. Inf. Carsten Eider <eider at fh-bingen.de>:
> my problem is not the algorithm how to split the field,
> it is more the way how to select one polygon, then select two corners
>
> which control should i use?
> a modified modifycontrol or can i reuse a selectcontrol?
>
>
> Burgholzer,Robert schrieb:
>>
>> For step 1) The Openlayers example "./examples/select-feature.html"
>> shows how to select a vector feature.
>>
>> For step 2-3, ,f you are using postgis server side, there was a thread
>> recently on the PostGIS listserv that involved some code for splitting
>> a polygon with a line.  I think this might work for you.  Since you
>> already have the capability to draw new shapes you may wish to change
>> steps 2-3 to:
>>
>> 2) draw a line
>>
>>
>>
>> and then simply use the function from PostGIS to split your selected
>> polygon.
>>
>>
>>
>> The thread pertaining to this is here:
>>
>>
>>
>> http://postgis.refractions.net/pipermail/postgis-users/2008-May/019892.html
>>
>>
>>
>>
>>
>>
>>
>> Robert W. Burgholzer
>>
>> Surface Water Modeler
>>
>> Office of Water Supply and Planning
>>
>> Virginia Department of Environmental Quality
>>
>> rwburgholzer at deq.virginia.gov <mailto:rwburgholzer at deq.virginia.gov>
>>
>> 804-698-4405
>>
>> Open Source Modeling Tools:
>>
>> http://sourceforge.net/projects/npsource/
>>
>> -----Original Message-----
>> *From:* dev-bounces at openlayers.org [mailto:dev-bounces at openlayers.org]
>> *On Behalf Of *Dipl. Inf. Carsten Eider
>> *Sent:* Friday, June 13, 2008 4:25 AM
>> *To:* users at openlayers.org; dev at openlayers.org
>> *Subject:* [OpenLayers-Dev] OL-Based GeoEditor
>>
>>
>>
>> Hi folks,
>>
>> i am working on a small geo-editor for an agricultural project in
>> rhine-palatinat/germany, visit http://www.agroconnect.de for more
>> information.
>> Upto now my editor has the following features:
>>
>> ·         new polygon, plain OL
>>
>> ·         edit polgon, plain OL
>>
>> ·         delete polygon, plain OL
>>
>> ·         union polygon, OL with a javaserver in the backend
>>
>> Coming feaures:
>>
>> ·         split polygon into 2 elements, OL with server backend
>>
>> ·         group polygons
>>
>> At the moment i am hanging a bit with the split-feature.
>> My idea is
>>
>> 1.      select polygon
>>
>> 2.      select first point/vertix as starting point
>>
>> 3.      select second point as ending point
>>
>> 4.      do split
>>
>> 5.      remove polygon and add the new ones
>>
>> Step 4 will be done on serverside,but could also be done on clientside.
>>
>> Any ideas how to realize steps 1-3. Should i use several controls
>> (Select and Modify) or
>> should i subclass Control.ModifyFeature ?
>>
>> Any hints will be appreciated.
>>
>>
>> --
>> Mit freundlichen Grüßen / Yours faithfully
>> Carsten Eider
>>
>> Dipl. Inf. (FH)
>>
>> Kompetenzzentrum für Innovative Informationssysteme
>>
>> c/o Fachhochschhule Bingen / University of applied sciences Bingen
>>
>> Berlinstraße 109
>> 55411 Bingen
>>
>> Tel: +49 (0) 6721 / 409-179
>> Fax: +49 (0) 6721 / 409-158
>> email: eider at fh-bingen.de <mailto:eider at fh-bingen.de>
>> Internet: iis.fh-bingen.de
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> Users mailing list
>> Users at openlayers.org
>> http://openlayers.org/mailman/listinfo/users
>>
>
> --
> Mit freundlichen Grüßen / Yours faithfully
> Carsten Eider
>
> Dipl. Inf. (FH)
>
> Kompetenzzentrum für Innovative Informationssysteme
>
> c/o Fachhochschhule Bingen / University of applied sciences Bingen
>
> Berlinstraße 109
> 55411 Bingen
>
> Tel: +49 (0) 6721 / 409-179
> Fax: +49 (0) 6721 / 409-158
> email: eider at fh-bingen.de
> Internet: iis.fh-bingen.de
>
>