[OpenLayers-Users] [OpenLayers-Dev] OL-Based GeoEditor

[Eric Lemoine]

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
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>> 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
>
>