I am not doing anything it..I thought OpenMapdoes what you say. Suppose you
want to zoomin to map..will this change projection parameters? or panning?
will it change projection parameter.? What I know is YES , because
everyhtime we zoom in we change scale....Please correct me if I am wrong.
----- Original Message -----
From: "Don Dietrick" <dietrick_at_bbn.com>
To: "CBSpatial" <support_at_cbspatial.com>
Cc: <openmap-users_at_bbn.com>
Sent: Monday, June 06, 2005 5:05 PM
Subject: Re: [OpenMap Users] Questions on how to use OpenMap as an applet
which uses data from server
Actually, if you are re-projecting your layer data for every render,
you are doing something wrong. The data only needs to be re-
projected when the projection for the map changes.
With any application, there are configuration choices to made that
can hamper and/or improve performance.
On Jun 6, 2005, at 8:33 AM, CBSpatial wrote:
> OpenMap is slow..this is an unfortunate fact..I guess this is
> because of the
> fact that it calculates screen coordinates by using projection
> class to
> everytime to render the layers..This is what slows down OpenMap...
> ----- Original Message -----
> From: "Mariusz Chmielewski" <mchmiel21_at_tlen.pl>
> To: "Don Dietrick" <dietrick_at_bbn.com>; "OpenMap Support"
> <openmap_at_bbn.com>;
> <openmap-users_at_bbn.com>
> Sent: Monday, June 06, 2005 2:40 PM
> Subject: Re: [OpenMap Users] Questions on how to use OpenMap as an
> applet
> which uses data from server
>
>
>
>> Using relative path isn't such a great idea becouse of the size of
>> the
>> RPF map (32 MB) would You suggest?? I have a problem putting such
>> data
>> into the JAR - i do not know if the JAVA VM will allow to execute
>> such
>> application. I am thinking of using Java Web Start but this does not
>> solve my problem i do not want to put map data into my jar file of an
>> applet is there a chance thath if i point to map in URL openMap layer
>> will automaticly download it itself?? is there a chance that i could
>> write some code as a servlet that loads a whole CADRG map and
>> sends only
>> little piec of it as a new CADRG map. Has anybody tried it?? why the
>> engine of open map is so slow while using the CADRG data. When i
>> scroll
>> 3 layer on my 2,2 GHz Pentium 4 512 RAM - i am waiting almost 5
>> seconds
>> befor i can see anything.
>>
>> Thanks for any opinions and hints
>>
>>
>> Don Dietrick napisał(a):
>>
>>
>>> Hi Mariusz,
>>>
>>> On May 27, 2005, at 8:50 AM, Mariusz Chmielewski wrote:
>>>
>>>
>>>> Hi I am now experiencing some problems with teh open map as an
>>>> applet. I written my own applet so it would be downloaded from the
>>>> server and it contains openmap. But i ve got some issues that i
>>>> cannot solve:
>>>> 1. i am using the CADRG MAPS, those are the spatial data which
>>>> requires large amount of memory about 2MB and the question is
>>>> should
>>>> i put the data into the jar file, or should i put the data on the
>>>> server and download it or should i simply load the resources on the
>>>> client. Ofcourse the 3 option is the worst becouse i do not want
>>>> the
>>>> spatial data to be accessable on the client maschine outside the
>>>> applet. (additional info to the first option how to load a map
>>>> using
>>>> properties file from local applet resources??)
>>>>
>>>
>>>
>>> You can put the data in a jar file.
>>>
>>>
>>>> 2. Concerning properties configuration (same as the map) where it
>>>> should be placed inside jar and how to load it??
>>>>
>>>
>>>
>>> You would configure the RPFLayer to have a relative path to the RPF
>>> directory in the jar file, from the root of the jar file.
>>>
>>>
>>>> 3. Is there a chance that i could load only a part of CADRG map and
>>>> the load the rest if neccessery?? so that i could minimize the size
>>>> of used memory during the execution of the applet??
>>>>
>>>
>>>
>>> That's the way the layer works now. It only loads what it needs. You
>>> can change the cache sizes so it holds onto less memory if you need
>>>
> that.
>
>>>
>>> - Don
>>>
>>> --
>>> [To unsubscribe to this list send an email to "majdart_at_bbn.com"
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>>>
>>>
>>>
>>
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>
>>
>
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Received on Mon Jun 06 2005 - 10:38:35 EDT