PHP Highlight list of Parcels Passed In

Abe Gillespie agillesp at VT.EDU
Sat Jan 22 23:39:07 PST 2005 

Um ... yeah, it's late and I'm tired.  Please replace "ampersand" with
"at symbol" at the appropriate place.  :)

-Abe

On Jan 23, 2005, at 1:44 AM, Abe Gillespie wrote:

> Ok, since this list has been so helpful and generous to me in the
> past, here is an exhaustive example.  I hope this will finally get you
> going.  Disclaimer:  I'm doing this all from memory and w/o testing so
> there may be a few errors.
>
> Setup a map file like this:
>
> MAP
>  NAME "Parcel Query"
>  STATUS on
>  EXTENT xmin ymin xmax ymax
>  SIZE 300 300
>  SHAPEPATH "/data_path"
>  IMAGETYPE png
>  IMAGECOLOR 255 255 255
>
>  QUERYMAP
>   STYLE hilite
>   COLOR 255 0 0
>  END
>
>  LAYER
>   NAME "Parcels"
>   DATA "parcels"
>   CLASS
>    OUTLINECOLOR 0 255 0
>   END
>   TEMPLATE "x"
>  END
> END
>
> Setup a web page like this:
>
> <html>
> <head>
> <?
> $parcel_ids = "1|2|3|4|5";
>
> if (PHP_OS == "WINNT" || PHP_OS == "WIN32")
>         dl("php_mapscript.dll");
> else
>         dl("php_mapscript.so");
>
> $map = ms_newMapObj("parcels.map");
> $layer = $map->getLayerByName("parcels");
>
> // Query.
> $layer->queryByAttributes("", "/".$parcel_ids."/", MS_MULTIPLE);
> // If you want to avoid errors when no matches are found use the
> ampersand
> // in the above statement like this:  @$layer->queryByAttributes();
>
> // Render an image and get its URL.
> $img = $map->drawQuery();
> $url = $img->saveWebImage(MS_PNG, 1, 1, 0);
> $img->free();
> ?>
> </head>
> <body>
> <img src="<? echo $url; ?>" />
> <?
> if ($layer->getNumResults() > 0)
>         echo $layer->getNumResults()." parcels found.";
> else
>         echo "No parcels found.";
> ?>
> </body>
> </html>
>
> Now that I look at it, the last thing you may have been missing was
> the mapObj::queryMap() method.  Anyhow, I hope this helps.
>
> -Abe
>
> On Jan 22, 2005, at 10:07 PM, Steve Lehr wrote:
>
>> Abe:
>>
>> I appreciate the help, still not getting it though.  I'm wondering if
>> I need
>> to draw out the map after rendering?  I've sceen other posts but no
>> real
>> solutions...
>>
>> I'll start from scratch rather then trying to reuse something I have.
>> If
>> anyone else has a more complete example I'd really appreciate seeing
>> it.
>>
>> Thanks
>>
>> Steven Lehr
>> Assistant Professor
>> Freshmen Program
>> College of Engineering
>> Embry-Riddle Aeronautical University (LB159)
>> 600 S. Clyde Morris Blvd.
>> Daytona Beach, FL 32114-3900
>> 386-226-7740
>>
>> -----Original Message-----
>> From: UMN MapServer Users List
>> [mailto:MAPSERVER-USERS at LISTS.UMN.EDU]On
>> Behalf Of Abe Gillespie
>> Sent: Saturday, January 22, 2005 8:22 PM
>> To: MAPSERVER-USERS at LISTS.UMN.EDU
>> Subject: Re: [UMN_MAPSERVER-USERS] PHP Highlight list of Parcels
>> Passed
>> In
>>
>>
>> Something else I noticed.  You shouldn't even have to setup a separate
>> layer to show queried parcels (though there are ways to do this).  I
>> suggest starting out with one layer that renders queried and
>> non-queried parcels at the same time.  Once you get the hang of that
>> then you can do two different layers (if you still even want to).
>> Make
>> the layer like this:
>>
>> LAYER
>>   NAME "parcels"
>>   DATA "parcels"
>>   STATUS on
>>   TYPE polygon
>>   CLASS
>>    OUTLINECOLOR 0 255 0
>>   END
>>   TEMPLATE "x"  # Must be present to query on (though "x" means
>> absolutely nothing).
>> END
>>
>> The above layer will render all your parcels green outline with hollow
>> fill.  Then when you use the PHP code to query it will render your
>> queried parcels red.  This assumes you have QUERYMAP setup correctly.
>>
>> -Abe
>>
>> On Jan 22, 2005, at 7:12 PM, Steve Lehr wrote:
>>
>>> Abe I've never used the QUERY MAP before, I tried putting it in the
>>> layer
>>> and it did not like that?
>>>
>>> My initial layer looks like:
>>>
>>> I changed my code to pass Pipe delimited.
>>>
>>> But I'm not quite certian I'm still getting what I need to do to my
>>> .map.
>>>
>>> Thanks for the help..below is the layer repeated my EXPRESSION is
>>> trashed I
>>> realize.
>>>
>>>>   LAYER
>>>>     NAME "selected_parcels"
>>>>     DATA parcels
>>>>     STATUS DEFAULT
>>>>     TYPE POLYGON
>>>>     CLASSITEM QPID
>>>>     CLASS
>>>>       EXPRESSION "/%parcels%/"
>>>>       COLOR 255 0 0
>>>>     END
>>>>   END
>>>
>>>
>>> Steven Lehr
>>> Assistant Professor
>>> Freshmen Program
>>> College of Engineering
>>> Embry-Riddle Aeronautical University (LB159)
>>> 600 S. Clyde Morris Blvd.
>>> Daytona Beach, FL 32114-3900
>>> 386-226-7740
>>>
>>> -----Original Message-----
>>> From: UMN MapServer Users List
>>> [mailto:MAPSERVER-USERS at LISTS.UMN.EDU]On
>>> Behalf Of Abe Gillespie
>>> Sent: Saturday, January 22, 2005 7:05 PM
>>> To: MAPSERVER-USERS at LISTS.UMN.EDU
>>> Subject: Re: [UMN_MAPSERVER-USERS] PHP Highlight list of Parcels
>>> Passed
>>> In
>>>
>>>
>>> For the red you need to setup the QUERYMAP.  For the PHP it will be
>>> something like this:
>>>
>>> $target =
>>> use_appropriate_string_func_to_conver_semi_to_pipe($parcels);
>>> // $target should look like "1|2|3|4" ... where the numbers are the
>>> IDs.
>>> $layer = $map->getLayerByName("parcels");
>>> $layer->queryByAttributes("parcel_id_field", "/".$target."/",
>>> MS_MULTIPLE);
>>>
>>> Also, don't forget to add the TEMPLATE "x" tag in your LAYER
>>> definition.
>>>
>>> I'm not a RegEx expert, so someone please put me in check if I'm
>>> leading Steven astray.
>>>
>>> -Abe
>>>
>>> On Jan 22, 2005, at 6:37 PM, Steve Lehr wrote:
>>>
>>>> I'm trying to write some PHP that I can send extents and list of
>>>> parcels to
>>>> get it to highlight the parcels.
>>>>
>>>> I'd like to highlight all the found parcels in RED.
>>>>
>>>> My php gets a variable by post called parcels and contains at this
>>>> time a
>>>> semi colon delimited list of ids in the attribute column QPID of the
>>>> parcels.dbf.
>>>>
>>>>   LAYER
>>>>     NAME "selected_parcels"
>>>>     DATA parcels
>>>>     STATUS DEFAULT
>>>>     TYPE POLYGON
>>>>     CLASSITEM QPID
>>>>     CLASS
>>>>       EXPRESSION "/%parcels%/"
>>>>       COLOR 255 0 0
>>>>     END
>>>>   END
>>>>
>>>>
>>>> I've got my extents.  I've got the list of parcels.  Now I want to
>>>> highlight
>>>> the list of parcels with something like the below.  But I have to do
>>>> something in php to take that ; delimited list and the turn on all
>>>> the
>>>> matching attributes.  (I belive its a QUERYMAP with MULTIPLE_SELECT)
>>>> but I'm
>>>> having trouble getting my brain around what I need to code - might
>>>> someone
>>>> have a sample.
>>>>
>>>> Thanks
>>>>
>>>> Steven Lehr
>>>> Assistant Professor
>>>> Freshmen Program
>>>> College of Engineering
>>>> Embry-Riddle Aeronautical University (LB159)
>>>> 600 S. Clyde Morris Blvd.
>>>> Daytona Beach, FL 32114-3900
>>>> 386-226-7740
>>>>
>>>
>>
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