[Geomoose-users] Dealing with scales

[James Klassen]

I second that.  Even feet vs meters should only be a factor of 3.  My
experience is GeoMoose scales are close to but not exactly the same as
MapServer scales (when DPI is left as defaults).  I haven't tried a site
using feet lately, but I know it used to work (the first GeoMoose site was
in feet.)

I'm sorry I am too swamped right now to dig into this further at the
moment.  Hopefully someone else on the list can help you more.
On Jun 19, 2013 11:07 AM, "Brent Fraser" <bfraser at geoanalytic.com> wrote:

>  Since the difference in the reported scale between Chameleon and
> Geomoose is over an order of magnitude, I suspect there is a units
> mis-configuration somewhere.  Just where depends on which reported scale is
> closer to what's expected...
>
> Best Regards,
> Brent Fraser
>
> On 6/19/2013 9:37 AM, Robert R. Raiz wrote:
>
> Hello James,
>
> Well, yes, actually for me it is important to know that the  MINSCALE /
> MAXSCALE from map files will be read accordingly in GeoMoose. I need the
> correspondence between them to be correct and to be able to check the
> correct rendering of features.
>
> I tested today and it seems what I have in the lower right part (GeoMoose)
> is not quite ok compared to what I have in the mapfile (I am only referring
> to scale here);
>
> To sum up, seeing the big difference between the scales in Chameleon and
> GeoMoose at the same extent, I do not understand how this could work. To
> give a short eg: I have a class rendered in the mapfile between MINSCALE
> 2000 and MAXSCALE 6000. How can see this range (class) in GeoMoose if I
> cannot rely on the scale in the bottom right corner.
>
> Hope I am not missing something here :)
>
>
> On Wed, Jun 19, 2013 at 6:08 PM, James Klassen <klassen.js at gmail.com>wrote:
>
>> Not really since the browsers don't accurately report screen DPI, so
>> traditional scales in the interactive map are rather meaningless.  The main
>> place the scale is important is to allow printing to a known scale.
>> Assuming GeoMoose's DPI matches MapServer's (and I think it is at least
>> close), it also helps when setting min/max scale denominators in MapServer
>> layers/classes.
>>
>> The scale reported in the interface (in the drop down in the lower right)
>> is a scale assuming some nominal display DPI.  (Either 72, 75 or 96 I
>> think, but would have to check to be sure.)
>>
>> The scales parameter in the mapbook is actually a resolution.  (It is
>> simply passed into OpenLayers to setup the zoom levels, primarily for the
>> popular tiled basemaps.)
>>  On Jun 19, 2013 9:41 AM, "Robert R. Raiz" <raizrobert at gmail.com> wrote:
>>
>>>  Oh, as usual, I find something right after I post..
>>> I read that "The scales are actually ground units per pixel resolution
>>> settings and not true scales. "
>>>
>>> Is it possible to somehow change this to render actual scales?
>>>
>>>
>>> On Wed, Jun 19, 2013 at 5:33 PM, Robert R. Raiz <raizrobert at gmail.com>wrote:
>>>
>>>> Hello all,
>>>>
>>>> As I said in a previous post, I am trying to replace the old Chameleon
>>>> web mapping tool with GeoMoose.
>>>>
>>>> Something that I did not quite understand, is why the scales are
>>>> different in these two mapping tools if they have the same extent;
>>>>
>>>> So, I have an extent in the mapfile. Chameleon is giving me a scale
>>>> of 448286 and in GeoMoose I have 1:35203
>>>>
>>>> Can you please tell me what am I missing? I first thought that it has
>>>> something to do with the ground_units param (as I need the units in feet);
>>>>
>>>> Thank you,
>>>> --
>>>> *Raiz Roland Robert*
>>>>
>>>>
>>>>
>>>
>>>
>>>  --
>>> *Raiz Roland Robert*
>>>
>>>
>>>
>>>  _______________________________________________
>>> Geomoose-users mailing list
>>> Geomoose-users at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/geomoose-users
>>>
>>>
>
>
>  --
> *Raiz Roland Robert*
>
>
>
>
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