How to edit attribute of a selected shape?

Fri Jan 27 01:41:20 PST 2006

OK this is a part of the php code I used to add point to shp, notice to use it you have to first give an attribute value (fill a html input) which you will save in a dbf. file, than click on a map to add this point (I was using previously created blank shp. file)
ad here is the code:

else if ($HTTP_FORM_VARS["CMD"] == "INPUT_POINT")
 {
  $nClickGeoX = GMapPix2Geo($nClickPixX, 0, $dfWidthPix, 
           $dfMinX, $dfMaxX, 0);
  $nClickGeoY = GMapPix2Geo($nClickPixY, 0, $dfHeightPix, 
           $dfMinY, $dfMaxY, 1);

  $oPoint = ms_newPointObj();
  $oPoint->setXY($nClickGeoX, $nClickGeoY);

  $oshpfile = ms_newShapefileObj('C:\Program Files\Apache Group\Apache2\htdocs\data\siedlce\ptk', -2);

  $dbname = "C:/Program Files/Apache Group/Apache2/htdocs/data/siedlce/ptk.dbf";

  $db = dbase_open ( $dbname,2);

  $nf = dbase_numfields($db);
  $rn = dbase_numrecords ($db);

  if (ereg("([0-9]+)", $HTTP_FORM_VARS["atrybuty"], $vatr))
  {
   $def = array($vatr[1]);
  }
  else
  {
   $def = array($rn+1);
  }

  $oshpfile->addPoint($oPoint);
  dbase_add_record($db, $def);

  dbase_close ($db);

  $oshpfile->free();
  $oPoint->free();
}

usig this i never had any problem with overwriting allready added points, no such thing happened

hope this helps

regards

Artur Skalski 

ACXIOM Polska
Telephone:      (+48 22) 606 11 27      Budynek Saturn
Facsimile:      (+48 22) 606 11 28      Domaniewska 41
Mobile:         (+48) 503 070 036       02-672 Warszawa
E-mail:         artur.skalski at acxiom.com 

-----Original Message-----
From: Xiaonan Zhang [mailto:xnzhang11 at gmail.com]
Sent: Thursday, January 26, 2006 12:59 PM
To: Skalski Artur - askals
Cc: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: Re: [UMN_MAPSERVER-USERS] How to edit attribute of a selected shape?

hi, Skalski,

Thanks for the reply. However could you please give more information on this. Maybe an example.

The code was working partly ok, the new point can be added, however as I said, it will overwrite the old one. It's attribute was inherited from the old one. I now want to change it's attribute and when I use  $poLayer->getResult(0); there seems not point was picked up. 

regards,

Jonathan

On 26/01/06, Skalski Artur - askals < Artur.Skalski at acxiom.com> wrote: 

To change an attribute of added point You have to also update a dbase file (I don't see that in your code) wihich stores all atributes of shapes in shp.file, otherwise you get nothing. And if you try to open such a file in ArcViwe it will promt taht tha file was damaged which is because dbf. file record number doesn't mach shp. file record number. 
dbase.dll which is used to create and update dbf. file comes with standard distribution off all lates php binaries

ragards

Artur Skalski 

ACXIOM Polska
Telephone:      (+48 22) 606 11 27      Budynek Saturn
Facsimile:      (+48 22) 606 11 28      Domaniewska 41 
Mobile:         (+48) 503 070 036       02-672 Warszawa
E-mail:         artur.skalski at acxiom.com 

-----Original Message-----
From: UMN MapServer Users List [mailto:  <mailto:MAPSERVER-USERS at LISTS.UMN.EDU> MAPSERVER-USERS at LISTS.UMN.EDU]On Behalf Of Xiaonan Zhang
Sent: Wednesday, January 25, 2006 6:02 PM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: [UMN_MAPSERVER-USERS] How to edit attribute of a selected shape?

Dear all,

I am tring to create a function which can add comment point onto layer however I got a few problems here:
1. the newly added one always overwrite the existing point so there is always only one point in that layer.
2. I can not regain the added point.
3. how to change the attribute of the added point, say there is one attribue called "Comment".

thanks. 

My code is:

//Create a new comment point
            $ClickGeo = ms_newPointObj();
            $ClickGeo->setXY($nClickGeoX, $nClickGeoY);

            //printf("ClickGeoX %f<BR>\n",$nClickGeoX); 
          //printf("ClickGeoY %f<BR>\n",$nClickGeoY);

          //Add it to the comments layer
          $shape = ms_newShapeObj(MS_SHAPE_POINT);
          $line = ms_newLineObj(); 
          $line->add($oClickGeo);
          $shape ->add($line);

          $poLayer = $gpoMap->getlayerbyname(comments); //get the layer "comments"
          $poLayer->open();
          //printf("Layer Name: %f<BR>\n", $poLayer->name);

          $poLayer-> addfeature($shape); //add the new comment point  

          //Save the changes     
            $cmmShapefile = "../htdocs/data/comments"; 
          $objShapefile = ms_newShapeFileObj( $cmmShapefile, MS_SHP_POINT ); 
          $objShapefile->addshape($shape);
          $objShapefile->free;
           $poLayer->close(); 

          //Task2: Use layer->querybypoint to regain the newly added point and then change it's comment attribut 

          //Task2.1:get the new added comment point
                 $poLayer->querybypoint($oClickGeo, MS_SINGLE, 2); 
                 $numResults = $poLayer->getNumResults();
                 printf("Find point: %f<BR>\n", $numResults);                                 
                 $oRes = $poLayer->getResult(0); 
                 printf("tileindex: %f<BR>\n", $oRes->tileindex);
                 printf("SHAPEINDEX: %f<BR>\n", $oRes->shapeindex);                 
                $oShape = $poLayer->getShape(-1,0); //(-1,-1)
                print_r($oShape->values); //print the keys of the values array
                $comment = $oShape->Values["Comment"]; 
                printf("The comment attribute is ---: %f<BR>\n",$comment ); //display comment attribute

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