Shapefile field problem

[Jeff McKenna]

Abe,

I made a tiny mapfile with your test shp, and i see labels properly in
MapServer with it.  I added an attribute in the "OWNERS_NAM" field and I
successfully displayed it in mapserver.  Am i misunderstanding your
problem somehow?  (mapfile below)

jeff

MAP
   NAME "field-test"
   STATUS ON
   EXTENT 1260565.500000 941362.000000 1261605.125000 942198.625000
   SIZE 400 300
   SHAPEPATH "D:/DMSG/projects/mapserver-bugs/"
   SYMBOLSET "../etc/symbols.sym"
   FONTSET "../etc/fonts.txt"
   IMAGETYPE gif
   IMAGECOLOR 255 255 255
   UNITS METERS
   WEB
     IMAGEPATH "/ms4w/tmp/ms_tmp/"
     IMAGEURL "/ms_tmp/"
     METADATA
     END
   END

   OUTPUTFORMAT
     NAME "gif"
     MIMETYPE "image/gif"
     DRIVER "GD/GIF"
     EXTENSION "gif"
     IMAGEMODE PC256
     TRANSPARENT FALSE
   END

LAYER
   NAME test
   TYPE POLYGON
   STATUS ON
   DATA test
   LabelItem "OWNERS_NAM"
   CLASS
     NAME "ttt"
     COLOR 0 255 0
     LABEL
       COLOR  255 0 0
       FONT fritqat-italic
       TYPE truetype
       SIZE 8
       POSITION AUTO
       PARTIALS FALSE
       OUTLINECOLOR 255 255 255
     END
   END
END # Layer

END





Abe Gillespie wrote:
> I do appreciate the help, but I'm not looking for an "external to
> MapServer" way of getting access to my DBF field values.  I just use my
> PHP script to *reveal* problematic shapefile fields.  When there is a
> problem it's unusable to MapServer!  I.e.: I can't use the field for
> labelling.
>
> -Abe
>
> On Dec 7, 2004, at 11:27 AM, Ryan, Adam wrote:
>
>> Abe,
>>
>> Here's a routine I use to get the header information (field info) from
>> a dbf
>> file.
>>
>> //      ==========      iDbf_fields     ==============
>> //      $f is a dbf file path, returns an array of field arrays
>> function iDbf_fields($f){
>>         $h = fopen($f,"rb");
>>         $a =
>> unpack("cversion/cyy/cmm/cdd/inumrecs/sheadsize/
>> srecsize",fread($h,12));
>>         fread($h,20);   //skip some reserved space
>>         for($i=0;$i<($a["headsize"]-33)/32;$i++){
>>                 $fa = array();
>>                 $fname = trim(fread($h,11));
>>                 $fa["type"] = fread($h,1);
>>                 fread($h,4);
>>                 $fa = array_merge($fa,unpack("Clen/Cpre",fread($h,2)));
>>                 fread($h,14);
>>                 $flds[$fname] = $fa;
>>         }
>>         fclose($h);
>>         return $flds;
>> }
>>
>> When I generate a result table I'll go through the array like this:
>> ($so is
>> the shape Object)
>>
>>                         foreach($flds as $fname => $fA){
>>                                 $val = $so->values[$fname];
>>                                 if ($val==null)$val="&nbsp";
>>                                 $val = str_replace("  ","
>>  ",$val);
>>                                 if ($fA["type"]=="D"){$val =
>> substr($val,4,2)."-".substr($val,6,2)."-".substr($val,0,4);}
>>                                 echo "<td>$val</td>";}
>>                 }
>>
>>
>> Cheers to all,
>>
>> Adam
>>
>>> -----Original Message-----
>>> From: Abe Gillespie [mailto:agillesp at VT.EDU]
>>> Sent: Monday, December 06, 2004 5:14 PM
>>> To: MAPSERVER-USERS at LISTS.UMN.EDU
>>> Subject: Re: [UMN_MAPSERVER-USERS] Shapefile field problem
>>>
>>>
>>> It's a regular shapefile.  I think I've mostly narrowed it
>>> down.  It seems to me (though I may be completely off) that
>>> MapServer loads the first record of the DBF in order to get
>>> the field definitions.  If the first record has a string
>>> field and the value is zero length it won't give me the field
>>> (though the field count is always correct).  In addition, it
>>> won't give me any fields after that either.  If, however, I
>>> make sure that field has some value (a dash, an "x",
>>> whatever) then the field definition will come in correctly.
>>> I still haven't narrowed down a problematic number field
>>> though.  Mind you, this is all done in MapServer PHP v. 4.2.0.
>>>
>>> -Abe
>>>
>>> On Dec 6, 2004, at 6:15 PM, Daniel Morissette wrote:
>>>
>>>> Abe Gillespie wrote:
>>>>
>>>>> A good amount of fields aren't showing up in MapServer for
>>>
>>> me.  I use
>>>
>>>>> the following PHP script to dump out all layers and their
>>>
>>> fields for
>>>
>>>>> debugging.  Does MapServer have problems with certain data
>>>
>>> types or
>>>
>>>>> certain values in a row?
>>>>>
>>>>
>>>> Are you using a tiled shapefile layer or is this a regular
>>>
>>> shapefile
>>>
>>>> layer?
>>>>
>>>> --
>>>> ------------------------------------------------------------
>>>>  Daniel Morissette               dmorissette at dmsolutions.ca
>>>>  DM Solutions Group              http://www.dmsolutions.ca/
>>>> ------------------------------------------------------------
>>>>
>>>
>>
>


--
Jeff McKenna
GIS Specialist
DM Solutions Group Inc.
http://www.dmsolutions.ca