[ka-Map-users] Precaching single layer

Lorenzo Becchi lorenzo at ominiverdi.com
Tue Mar 27 13:12:07 EST 2007

> On Tue, Mar 27, 2007 at 11:06:06AM -0600, János Gonzales wrote:
> > Hello,
> >
> > Suppose I pre-cached all of my map layers and then i changed my mind
> > about the symbology of one particular layer.
> >
> > I'm looking at
> > http://ka-map.ominiverdi.org/wiki/index.php/Pre-caching_system   and I
> > don't see an option to re- pre-cache just one single layer/group.
> >
> > I can think of a solution, but it is cumbersome.  I can take my
> > mapfile and rewrite it so that it contains only one group.  And do
> > that for each group I need re-cached and then run precache.php on it.
> >
> > Is there an easier way?
> I'm not 100% sure I understand what you're saying, but keep in mind that
> ka-Map generally is going to generate *one image* for your group of
> layers (unless you're in a different situation than I have used ka-map
> in the past). If you have a layer pre-cached, you have a number of
> images with all the data in those images -- you can't change a single
> layer in those images without regenerating the whole thing.
> But maybe you're looking at something else and I'm just crazy. It
> wouldn't be the first time.

Heh, Chris, I've the same opinion about me

my "crazy" solution:
delete the cache of just the changed layer in all zoom levels (in the 
cache dir)

rm -rf kamapcache/myMap/*/myLayer

or something like that

than do the precaching again fort that map without forcing redraw, this 
should create only those tile that does not exists.

does it make sense?


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