Re: [Geoserver-devel] How to change Geoserver's source code to offset GIS data

[Ziegler S. <Ste...@bd...>]

Hi 

 > Could you tell me how to modify Geoserver's source code?

No. But I would ask your boss why he wants to change the source code when there are easier options.

regards
Stefan
 

> Date: Thu, 28 Oct 2010 11:15:18 +0200
> From: Ste...@bd...
> To: lv...@li...; geo...@li...
> Subject: AW: [Geoserver-devel] How to change Geoserver's source code to offset GIS data
> 
> Hi
> 
> 
> 
> your aim is not to change GeoServer's source code. You are not allowed
> to publish the real coordinates to the public. One approach is to
> randomly falsify the coordinates of your points or . 
> 
> You wrote that you want to use a database like oracle or
> postgresql/postgis. The first step is to import your shape into the
> database, for postgis you can use e.g. shp2pgsql [1]. This will create
> a table from your shape. Then you have to make a view in the database
> [2]:
> 
> 
> 
> CREATE OR REPLACE VIEW your_table_v AS 
> 
> SELECT ST_Translate(wkb_geometry, random()*30, random()*30) FROM your_table
> 
> 
> 

> ST_Translate [3] will offset the geometry using fixed values (in x and
> y direction). But you can use the random() function: The return value
> is a random number between 0.0. and 1.0. Using the return value as
> offset values it will translate every single point different but only
> between 0.0 and 1.0 meter/feet/degrees. If you want to apply bigger
> offsets you can multiply the random number by a numerical value (e.g.
> 30). This will apply offsets between 0 and 30 for x and y direction.
> 
> 
> 
> 
> 
> [1]: http://postgis.refractions.net/docs/ch04.html#shp2pgsql_usage
> 
> [2]: http://www.postgresql.org/docs/8.4/static/sql-createview.html
> 
> [3]: http://postgis.refractions.net/documentation/manual-1.5/ST_Translate.html
> 
> 
> 
> 
> 
> regards
> 
> Stefan
> 
> mit freundlichem Gruss
> Stefan Ziegler
> 
> 
> ----- Origi
nalnachricht -----
> Von: lv <lv...@li...>
> Gesendet: Don, 28.10.2010 10:46
> An: geo...@li...
> Betreff: Re: [Geoserver-devel] How to change Geoserver's source code to offset GIS data
> 
> 
> Hi, 
> 
> 
> 
> How to change Gerserver's source code?
> 
> Can st_translate offset each point to different place? For example, I have a shape which contains lots of points. Can st_translate offset each point to a different place or just offset all points to a same place? I have spent more than one week on looking for a solution. But I still cannot find it.
> 
> 
> > Date: Wed, 27 Oct 2010 13:29:59 +0200
> > From: Ste...@bd...
> > To: lv...@li...; geo...@li...
> > Subject: AW: [Geoserver-devel] How to change GIS data before publishing map
> > 
> > Hi
> > 
> > my suggestion is: 
> &
gt; 1) Import the data into postgis.
> > 2) Create a view and adjust the offsets by using the ST_Translate [1] and random() [2] functions, eg:
> > 
> > select st_translate(wkb_geometry, random()*30, random()*30) from your_table
> > 
> > This will translate the geometry with some pseudo randomized values (from 0 to 30).
> > 
> > 3) Publish the view in GeoServer.
> > 
> > 
> > [1]: http://postgis.refractions.net/documentation/manual-1.5/ST_Translate.html
> > [2]: http://www.postgresql.org/docs/8.2/interactive/functions-math.html
> > 
> > regards
> > Stefan
> > 
> > 
> > mit freundlichem Gruss
> > Stefan Ziegler
> > 
> > 
> > ----- Originalnac
> hricht -----
> > Von: lv <lv...@li...>
> > Gesendet: Mit, 27.10.2010 12:27
> > An: geo...@li...
> > Betreff
: [Geoserver-devel] How to change GIS data before publishing map
> > 
> > 
> > I need to change the Geoserver source code to offset data before the map can be published on the web browser.
> > 
> > My customer does not want to disclose precise GIS data and maps to the developers who are not on client site. 
> > 
> > My customer gives me a jar file which can randomly create data for offsetting. I can get these random data.
> > 
> > What should I do is as follow:
> > 
> > 1, I need to get data from database (Oracle or PostGIS).
> > 
> > 2, get data from the jar file to offset all GIS data in the map. For example, 30% points of these data should be moved to south 100m. 30% points should be moved to north 10m.
> > 
> > The rest of points should be moved to east 25m. 
> > 
> > 3, After gettin
> g data from step 2, Geoserver can create new maps that all poin
ts are not at their original place.
> > 
> > 4, I use SLD (SLD with parameters) to offset maps but this solution is not acceptable.
> > 
> > 
> > 
> > How to modify the source code of Geoserver 2.0.1?
> > 
> > 
> > ------------------------------------------------------------------------------
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> -----------------
-------------------------------------------------------------
> Nokia and AT&T present the 2010 Calling All Innovators-North America contest
> Create new apps & games for the Nokia N8 for consumers in U.S. and Canada
> $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing
> Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store 
> http://p.sf.net/sfu/nokia-dev2dev_______________________________________________
> Geoserver-devel mailing list
> Geo...@li...
> https://lists.sourceforge.net/lists/listinfo/geoserver-devel