<br><font size=2><tt>> I wanna build it on mobile phone, for example,
NOKIA S40 series <br>
> which only permit 64K program size for a J2ME size. We have to do
<br>
> reading and rendering in this little program, so unzip and xml <br>
> parser will waste too much space.<br>
> A compact binary gis format is what i need I think. Is there a <br>
> format already exist in the world meet my requirement? or I have to
<br>
> create one myself?<br>
</tt></font>
<br><font size=2><tt>I'd just used a basic comma delimited format. Depending
on the size and type of data you are transmitting, I assume this would
be smallest. If you are using j2me, perhaps there is a java specific
data type that you could use instead of basic text. I'm not familiar
with the inner workings of j2me, but I've seen other languages that use
XML to encoded and transmit objects (i.e. XML-RPC). If you could
have j2me receive such transmissions, that'd be the way I'd go.</tt></font>