Adding points to a shp file

[Mike Talbutt]

Unfortunately in the java mapscript API the add method on shape only
takes a lineObj object, I believe a lineObj with only one point set is a
point.

-----Original Message-----
From: Trimble, Beheen [mailto:btrimble at sfwmd.gov] 
Sent: 10 October 2006 13:57
To: Mike Talbutt; MAPSERVER-USERS at LISTS.UMN.EDU
Subject: RE: [UMN_MAPSERVER-USERS] Adding points to a shp file


I don't know mapscript but below does not look right to me:

lineObj lo = new lineObj();
pointObj po = new pointObj(1d,1d,0d);
lo.add(po);

Are you adding a point object to a line object consisting of only one
point? If that is how line is created in java mapscript I think it
should be 2 points. Try just adding the point to shape object by itself,
just create on type shape object such as point shape.

B

-----Original Message-----
From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On
Behalf Of mikiet
Sent: Tuesday, October 10, 2006 8:48 AM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: Re: [UMN_MAPSERVER-USERS] Adding points to a shp file

I've noticed that the first time I ran my test it emptied the shape
file, the original ogrinfo on the file produced was

Layer name: worldCities
Geometry: Point
Feature Count: 12686
Extent: (-178.166667, -54.800000) - (179.383333, 78.933333) Layer SRS
WKT:
(unknown)
ID: Integer (6.0)
ATTRIB: Integer (4.0)
MGCC: Integer (4.0)
ADMIN_CODE: Integer (4.0)
UFI: Integer (9.0)
POPULATION: Integer (9.0)
NAME: String (250.0)

after I had run my test the features were 0 and the extents 0.

the point coordinate that I am adding (1,1) in the test is well within
the extents of the original shape file  (-178.166667, -54.800000) -
(179.383333,
78.933333)





Trimble, Beheen wrote:
> 
> What is the coordinate of your new points? Are you adding (1,1,0)? Is 
> the unit understood by ogr? The problem usually is among extent, 
> projection and spatial reference! See if mapscript has any of these 
> types of functions. The extent shown, below, by grinfo is not
promising.
> 
> 
> B
> 
> -----Original Message-----
> From: UMN MapServer Users List [mailto:MAPSERVER-USERS at lists.umn.edu]
On
> Behalf Of mikiet
> Sent: Tuesday, October 10, 2006 7:14 AM
> To: MAPSERVER-USERS at lists.umn.edu
> Subject: [UMN_MAPSERVER-USERS] Adding points to a shp file
> 
> Hi there,
> 
> I am using java mapscript and have a requirement to add some points to

> an ESRI shape file (bear with me here, I'm a mapinfo man). I'm using 
> an ESRI
> shape file that came with the ms101 tutorial WorldCities.shp. Its
> definitly
> a point shape file as when I run ogrinfo on it I get 
> 
> Layer name: worldCities
> Geometry: Point
> Feature Count: 0
> Extent: (0.000000, 0.000000) - (0.000000, 0.000000)
> Layer SRS WKT:
> (unknown)
> ID: Integer (6.0)
> ATTRIB: Integer (4.0)
> MGCC: Integer (4.0)
> ADMIN_CODE: Integer (4.0)
> UFI: Integer (9.0)
> POPULATION: Integer (9.0)
> NAME: String (250.0)
> 
> I have created a simple class to add a point to this file, see below, 
> the code runs without error however no feature is added to the file, 
> I'm sure
> its a simple fix but can anyone point me in the right direction please
?
> 
>     public static void test(){
>    	 try {
>    		System.out.println("starting run....");
> 		shapeObj shape = new
shapeObj(mapscript.MS_SHAPEFILE_POINT);
> 		lineObj lo = new lineObj();
> 		pointObj po = new pointObj(1d,1d,0d);
> 		lo.add(po);
> 		shape.add(lo);
> 		String shapeFullPath =
> "C:\\ms4w\\apps\\ms101\\data\\shapefile\\WorldCities.shp";
> 		shapefileObj shapefile = new shapefileObj(shapeFullPath,
> mapscript.MS_SHAPEFILE_POINT);
> 		shapefile.add(shape);
> 		System.out.println("Shape added");
>     } catch (Exception e) {
>     	e.printStackTrace();
>     }
>     }
> -- 
> View this message in context:
>
http://www.nabble.com/Adding-points-to-a-shp-file-tf2415928.html#a673434
> 3
> Sent from the Mapserver - User mailing list archive at Nabble.com.
> 
> 

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