[mapserver-users] Scale Bar Size Issue

Tue Sep 29 09:08:37 PDT 2009

Sounds like a plan - the best of both worlds!

Thanks,
Pat

Steve Lime wrote:
> 
> I thought about this more last night and settled on using a negative width
> to imply bar width
> and a positive width to imply image width. Wouldn't affect the mapfile
> defs or anything like that
> and a relatively easy addition on my part.
> 
> Steve
> 
>>>> On 9/29/2009 at 10:06 AM, in message
> <1254236781386-3736841.post at n2.nabble.com>, PatB
> <pbarnhart at gis-services.com>
> wrote:
> 
>> Gotcha - I meant that the image size I'd need to calculate would change
>> because of the text etc.
>> 
>> I don't think changing the ms source code is an option for me, I'd prefer
>> to
>> go that route but don't have direct access to the produciton server.  If,
>> however, you come up with a patch please pass it along, maybe I can talk
>> my
>> boss into letting me use it :)  It could also help someone else down the
>> line, I can't be the only person that wants control of the interval size.
>> 
>> So anyway, I know the output dpi and I know I want 1/2" intervals for
>> english and 1 cm for metric so I may end up just making a one size fits
>> all
>> graphic and sticking text underneath it.  Sucks though.
>> 
>> Thanks for your help,
>> Pat
>> 
>> 
>> Steve Lime wrote:
>>> 
>>> No, the image size is held constant and changes in the bar itself are
>>> made
>>> to accommodate for
>>> that restriction, at least that what we try to do. We know how much
>>> space
>>> we have for the 
>>> bar and the various text elements and work backwards from that. You say,
>>> if the bar is
>>> so big the text is this, does it fit? If not then make the bar a touch
>>> shorter and re-compute 
>>> things. Again, that  was done to  facilitate websites where just image
>>> elements change and 
>>> not printing.
>>> 
>>> I suppose one could hack the scalebar code to interpret the size to mean
>>> "the bar" and not
>>> the image, or at least have that as an option. I'll take a peek and get
>>> back to you (or feel free
>>> if you're so inclined). Probably easier to hack the source than make
>>> your
>>> own.
>>> 
>>> Steve
>>> 
>>>>>> On 9/28/2009 at 2:12 PM, in message
>>>>>> <1254165139306-3731312.post at n2.nabble.com>,
>>> PatB <pbarnhart at gis-services.com> wrote:
>>> 
>>>> The image size will vary because of the length of the last callout
>>>> under
>>>> the
>>>> bar, right?  100000 km will stick out past the bar farther than 5000 m. 
>>>> I
>>>> guess I could eyeball how much based on the font size, number of
>>>> characters
>>>> and ouput dpi but, well, bleach.  Is there a better way?  Plan B is to
>>>> make
>>>> my own scalebar but I'm not wild about that idea either.
>>>> 
>>>> Engineers all over the world just cringed when I wrote 'eyeball'.
>>>> 
>>>> Thanks.
>>>> 
>>>> 
>>>> Steve Lime wrote:
>>>>> 
>>>>> When you set a size for a scalebar the width you provide is what you
>>>>> get
>>>>> back. The height is for
>>>>> the bar only. This was done so that scalebar images could retain the
>>>>> same
>>>>> image size and you 
>>>>> could just swap img.src in a web app (assuming you're not mucking with
>>>>> font sizes). You'll likely
>>>>> have to experiment a bit with the width then to get it roughly the
>>>>> right
>>>>> size (e.g ask for 750).
>>>>> 
>>>>> Steve
>>>>> 
>>>>>>>> On 9/24/2009 at 11:04 PM, in message
>>>>> <1253851467382-3710334.post at n2.nabble.com>, PatB
>>>>> <pbarnhart at gis-services.com>
>>>>> wrote:
>>>>> 
>>>>>> Hi,
>>>>>> 
>>>>>> I'm using the code below to request a scalebar from mapserver.  My
>>>>>> understanding of the documentation is that the size parameter sets
>>>>>> the
>>>>>> size
>>>>>> of the scalebar itself not including the text, border, etc but that's
>>>>>> not
>>>>>> what I'm getting back.  The url below returns an image that is 600 x
>>>>>> 153
>>>>>> (I'm requesting 600 x 75) when it should be more like 750 x 153 to
>>>>>> account
>>>>>> for the surrounding stuff.  The height works as expected and the
>>>>>> units/distances look right, the width of the scalebar itself is the
>>>>>> issue.
>>>>>> 
>>>>>> This is for a print app, the output res is 300dpi so by setting the
>>>>>> width
>>>>>> to
>>>>>> 600 I was hoping to print a 2 inch wide scale bar with four 1/2"
>>>>>> intervals. 
>>>>>> This seems like it would be a common task but I've been digging
>>>>>> though
>>>>>> the
>>>>>> forum for hours without success.  A little help?  I'm using MS
>>>>>> version
>>>>>> 5.4.2
>>>>>> 
>>>>>> mapserv.exe?MAP=C:/ms4w/tmp/maps/mp.map&mode=scalebar&mapext=-8798233+4184184+-8
>>>>>> 
>>>> 
>> 793280+4188502&mapsize=11700+10200&map.scalebar=units+feet+size+600+75+interval
>> 
>>>> 
>>>>>> s+4+label+size+40+end
>>>>>> 
>>>>>> and my map file goes something like:
>>>>>> 
>>>>>> MAP
>>>>>> ...
>>>>>> UNITS meters
>>>>>> ...
>>>>>> SCALEBAR
>>>>>>   STYLE 0
>>>>>>   IMAGECOLOR 255 255 255
>>>>>>   LABEL
>>>>>>     TYPE TRUETYPE
>>>>>>     FONT "tahoma"
>>>>>>     SIZE 40
>>>>>>     COLOR 0 114 255
>>>>>>   END
>>>>>>   SIZE 600 75
>>>>>>   COLOR 235 235 235
>>>>>>   BACKGROUNDCOLOR 0 114 255
>>>>>>   OUTLINECOLOR 0 0 0
>>>>>>   UNITS meters
>>>>>>   INTERVALS 4
>>>>>>   STATUS on
>>>>>>   TRANSPARENT on
>>>>>> END
>>>>>> ...
>>>>>> 
>>>>>> Thanks - and yes, the map size is friggin huge.
>>>>> 
>>>>> _______________________________________________
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>>>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users 
>>>>> 
>>>>> 
>>> 
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