[OAM-talk] OpenAerialMap questions

Christopher Schmidt crschmidt at metacarta.com
Sat Dec 8 13:25:22 MST 2007


On Sat, Dec 08, 2007 at 03:04:19PM -0500, Christopher Schmidt wrote:
> On Sat, Dec 08, 2007 at 10:37:10AM -0800, Matthew Perry wrote:
> > On Dec 8, 2007 8:13 AM, Christopher Schmidt <crschmidt at crschmidt.net> wrote:
> > > On Fri, Dec 07, 2007 at 12:09:25PM -0800, Matthew Perry wrote:
> > > > On Dec 7, 2007 11:15 AM, Christopher Schmidt <crschmidt at crschmidt.net> wrote:
> > > > The NAIP imagery I am interested in comes as mrsid in UTM projection.
> > > > (http://new.casil.ucdavis.edu/casil/remote_sensing/naip_2005/county_mosaics/).
> > > >
> > > > Is the GDAL version on the server built with Mr Sid support? What
> > > > about supporting on-the-fly reprojection via mapserver? Or is this
> > > > just two strikes against this dataset and it will require alot of
> > > > pre-processing?
> > >
> > > Decompressing from MrSID on the fly is slow. Reprojecting on the fly is
> > > very slow. However, pre-processing data is not something that is some
> > > kind of permanant black mark against a dataset: indeed, it is my
> > > expectation that any serious dataset will need lots of reprocessing in
> > > order to use.
> > 
> > Good points. I was looking for efficiency on the data providers end to
> > hopefully get more organizations to contribute. But pre-processing is
> > certainly more efficient on the delivery end.
> 
> I think that 

I have no idea what I was planning to finish this sentence with that
isn't reitereated in the rest of the email, for the record :)

Regards,
-- 
Christopher Schmidt
MetaCarta



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